WARNINGS AND PRECAUTIONS SECTION.

5 WARNINGS AND PRECAUTIONS. Finasteride tablets mg reduce serum prostate specific antigen (PSA) levels by approximately 50%. However, any confirmed increase in PSA while on finasteride tablets mg may signal the presence of prostate cancer and should be evaluated, even if those values are still within the normal range for men not taking 5-reductase inhibitor (5.1). Finasteride tablets mg may increase the risk of high-grade prostate cancer (5.2, 6.1). Females should not handle crushed or broken finasteride tablets mg when they are pregnant or may potentially be pregnant due to potential risk to male fetus (5.3, 8.1, 16). Finasteride tablets mg are not indicated for use in pediatric patients or females (5.4, 8.1, 8.2, 8.4, 12.3).Prior to initiating treatment with finasteride tablets mg for BPH, consideration should be given to other urological conditions that may cause similar symptoms (5.6).. Finasteride tablets mg reduce serum prostate specific antigen (PSA) levels by approximately 50%. However, any confirmed increase in PSA while on finasteride tablets mg may signal the presence of prostate cancer and should be evaluated, even if those values are still within the normal range for men not taking 5-reductase inhibitor (5.1). Finasteride tablets mg may increase the risk of high-grade prostate cancer (5.2, 6.1). Females should not handle crushed or broken finasteride tablets mg when they are pregnant or may potentially be pregnant due to potential risk to male fetus (5.3, 8.1, 16). Finasteride tablets mg are not indicated for use in pediatric patients or females (5.4, 8.1, 8.2, 8.4, 12.3).. Prior to initiating treatment with finasteride tablets mg for BPH, consideration should be given to other urological conditions that may cause similar symptoms (5.6).. 5.1 Effects on Prostate Specific Antigen (PSA) and the Use of PSA in Prostate Cancer Detection. In clinical studies, finasteride tablets mg reduced serum PSA concentration by approximately 50% within six months of treatment. This decrease is predictable over the entire range of PSA values in patients with symptomatic BPH, although it may vary in individuals. For interpretation of serial PSAs in men taking finasteride tablets mg, new PSA baseline should be established at least six months after starting treatment and PSA monitored periodically thereafter. Any confirmed increase from the lowest PSA value while on finasteride tablets mg may signal the presence of prostate cancer and should be evaluated, even if PSA levels are still within the normal range for men not taking 5--reductase inhibitor. Non-compliance with finasteride tablets mg therapy may also affect PSA test results. To interpret an isolated PSA value in patients treated with finasteride tablets mg for six months or more, PSA values should be doubled for comparison with normal ranges in untreated men. These adjustments preserve the utility of PSA to detect prostate cancer in men treated with finasteride tablets mg. Finasteride tablets mg may also cause decreases in serum PSA in the presence of prostate cancer. The ratio of free to total PSA (percent free PSA) remains constant even under the influence of finasteride tablets mg. If clinicians elect to use percent free PSA as an aid in the detection of prostate cancer in men undergoing finasteride therapy, no adjustment to its value appears necessary.. 5.2 Increased Risk of High-Grade Prostate Cancer. Men aged 55 and over with normal digital rectal examination and PSA <=3 ng/mL at baseline taking finasteride mg/day in the year Prostate Cancer Prevention Trial (PCPT) had an increased risk of Gleason score to 10 prostate cancer (finasteride 1.8% vs placebo 1.1%). [See Indications and Usage (1.3) and Adverse Reactions (6.1).] Similar results were observed in 4 year placebo-controlled clinical trial with another 5-reductase inhibitor (dutasteride, AVODART) (1% dutasteride vs 0.5% placebo). 5--reductase inhibitors may increase the risk of development of high-grade prostate cancer. Whether the effect of 5-reductase inhibitors to reduce prostate volume, or study-related factors, impacted the results of these studies has not been established.. 5.3 Exposure of Females Risk to Male Fetus. Finasteride tablets mg is contraindicated in pregnant females and in females who may potentially be pregnant and not indicated for use in females. Based on animal studies and the mechanism of action, finasteride tablets mg may cause abnormal development of external genitalia in male fetus if administered to pregnant female. Females who are pregnant or may potentially be pregnant should not handle crushed or broken finasteride tablets mg tablets. Finasteride tablets mg tablets are coated and will prevent contact with the active ingredient during normal handling, provided that the tablets have not been broken or crushed. If pregnant female comes in contact with crushed or broken finasteride tablets mg tablets, the contact area should be washed immediately with soap and water. [See Contraindications (4), Use in Specific Populations (8.1), Clinical Pharmacology (12.1 and 12.3), and How Supplied/Storage and Handling (16).] 5.4 Pediatric Patients and Females. Finasteride tablets mg are not indicated for use in pediatric patients [see Use in Specific Populations (8.4) and Clinical Pharmacology (12.3)] or females [see also Warnings and Precautions (5.3), Use in Specific Populations (8.1), Clinical Pharmacology (12.3), and How Supplied/Storage and Handling (16)]. 5.5 Effect on Semen Characteristics. Treatment with finasteride tablets mg for 24 weeks to evaluate semen parameters in healthy male volunteers revealed no clinically meaningful effects on sperm concentration, mobility, morphology, or pH. 0.6 mL (22.1%) median decrease in ejaculate volume with concomitant reduction in total sperm per ejaculate was observed. These parameters remained within the normal range and were reversible upon discontinuation of therapy with an average time to return to baseline of 84 weeks.. 5.6 Consideration of Other Urological Conditions. Prior to initiating treatment with finasteride tablets mg, consideration should be given to other urological conditions that may cause similar symptoms. In addition, prostate cancer and BPH may coexist. Patients with large residual urinary volume and/or severely diminished urinary flow should be carefully monitored for obstructive uropathy. These patients may not be candidates for finasteride therapy.

ADVERSE REACTIONS SECTION.

6 ADVERSE REACTIONS. The drug-related adverse reactions, reported in >=1% in patients treated with finasteride tablets mg and greater than in patients treated with placebo over 4-year study are: impotence, decreased libido, decreased volume of ejaculate, breast enlargement, breast tenderness and rash (6.1). To report SUSPECTED ADVERSE REACTIONS, contact Sun Pharmaceutical Industries, Inc. at 1-800-818-4555 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience. Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. Year Placebo-Controlled StudyIn long-term efficacy and safety study, 1,524 patients treated with finasteride tablets mg and 1,516 patients treated with placebo were evaluated for safety over period of years. The most frequently reported adverse reactions were related to sexual function. 3.7% (57 patients) treated with finasteride tablets mg and 2.1% (32 patients) treated with placebo discontinued therapy as result of adverse reactions related to sexual function, which are the most frequently reported adverse reactions.Table presents the only clinical adverse reactions considered possibly, probably or definitely drug related by the investigator, for which the incidence on finasteride tablets mg were >=1% and greater than placebo over the years of the study. In years to of the study, there was no significant difference between treatment groups in the incidences of impotence, decreased libido and ejaculation disorder.Table 1: Drug-Related Adverse Experiences Year 1(%)Years 2, and 4Combined Years to (%)FinasteridePlaceboFinasteridePlaceboN 1,524 and 1,516, finasteride vs placebo, respectively Impotence 8.1 3.7 5.1 5.1 Decreased Libido 6.4 3.4 2.6 2.6 Decreased Volume of Ejaculate 3.7 0.8 1.5 0.5 Ejaculation Disorder 0.8 0.1 0.2 0.1 Breast Enlargement 0.5 0.1 1.8 1.1 Breast Tenderness 0.4 0.1 0.7 0.3 Rash 0.5 0.2 0.5 0.1 Phase III Studies and Year Open ExtensionsThe adverse experience profile in the year, placebo-controlled, Phase III studies, the year open extensions, and the long-term efficacy and safety study were similar.Medical Therapy of Prostatic Symptoms (MTOPS) StudyIn the MTOPS study, 3,047 men with symptomatic BPH were randomized to receive finasteride tablets mg/day (n=768), doxazosin or mg/day (n=756), the combination of finasteride tablets mg/day and doxazosin or mg/day (n=786), or placebo (n=737) for to years. [See Clinical Studies (14.2).]The incidence rates of drug-related adverse experiences reported by >=2% of patients in any treatment group in the MTOPS Study are listed in Table 2. The individual adverse effects which occurred more frequently in the combination group compared to either drug alone were: asthenia, postural hypotension, peripheral edema, dizziness, decreased libido, rhinitis, abnormal ejaculation, impotence and abnormal sexual function (see Table 2). Of these, the incidence of abnormal ejaculation in patients receiving combination therapy was comparable to the sum of the incidences of this adverse experience reported for the two monotherapies. Combination therapy with finasteride and doxazosin was associated with no new clinical adverse experience. Four patients in MTOPS reported the adverse experience breast cancer. Three of these patients were on finasteride only and one was on combination therapy. [See Long-Term Data.] The MTOPS Study was not specifically designed to make statistical comparisons between groups for reported adverse experiences. In addition, direct comparisons of safety data between the MTOPS study and previous studies of the single agents may not be appropriate based upon differences in patient population, dosage or dose regimen, and other procedural and study design elements.Table 2: Incidence >=2% in One or More Treatment Groups Drug-Related Clinical Adverse Experiences in MTOPS Adverse Experience Placebo (N=737)(%)Doxazosin4 mg or mgDoxazosin dose was achieved by weekly titration (1 to to to mg). The final tolerated dose (4 mg or mg) was administered at end-Week 4. Only those patients tolerating at least mg were kept on doxazosin. The majority of patients received the mg dose over the duration of the study. (N=756)(%)Finasteride (N=768)(%)Combination (N=786)(%)Body as whole Asthenia 7.1 15.7 5.3 16.8 Headache 2.3 4.1 2.3 Cardiovascular Hypotension 0.7 3.4 1.2 1.5 Postural Hypotension 16.7 9.1 17.8 Metabolic and Nutritional Peripheral Edema 0.9 2.6 1.3 3.3 Nervous Dizziness 8.1 17.7 7.4 23.2 Libido Decreased 5.7 10 11.6 Somnolence 1.5 3.7 1.7 3.1 Respiratory Dyspnea 0.7 2.1 0.7 1.9 Rhinitis 0.5 1.3 2.4 Urogenital Abnormal Ejaculation 2.3 4.5 7.2 14.1 Gynecomastia 0.7 1.1 2.2 1.5 Impotence 12.2 14.4 18.5 22.6 Sexual Function Abnormal 0.9 2.5 3.1 Long-Term DataHigh-Grade Prostate CancerThe PCPT trial was 7 year randomized, double-blind, placebo-controlled trial that enrolled 18,882 men >=55 years of age with normal digital rectal examination and PSA <= ng/mL. Men received either finasteride tablets mg or placebo daily. Patients were evaluated annually with PSA and digital rectal exams. Biopsies were performed for elevated PSA, an abnormal digital rectal exam, or the end of study. The incidence of Gleason score to 10 prostate cancer was higher in men treated with finasteride (1.8%) than in those treated with placebo (1.1%) [see Indications and Usage (1.3) and Warnings and Precautions (5.2)]. In 4 year placebo-controlled clinical trial with another 5-reductase inhibitor (dutasteride, AVODART), similar results for Gleason score to 10 prostate cancer were observed (1% dutasteride vs 0.5% placebo). No clinical benefit has been demonstrated in patients with prostate cancer treated with finasteride tablets mg. Breast CancerDuring the to year placebo- and comparator-controlled MTOPS study that enrolled 3,047 men, there were cases of breast cancer in men treated with finasteride but no cases in men not treated with finasteride. During the year, placebo-controlled long-term efficacy and safety study that enrolled 3,040 men, there were cases of breast cancer in placebo-treated men but no cases in men treated with finasteride. During the 7- year placebo-controlled Prostate Cancer Prevention Trial (PCPT) that enrolled 18,882 men, there was case of breast cancer in men treated with finasteride, and case of breast cancer in men treated with placebo. The relationship between long-term use of finasteride and male breast neoplasia is currently unknown. Sexual Function There is no evidence of increased sexual adverse experiences with increased duration of treatment with finasteride tablets mg. New reports of drug-related sexual adverse experiences decreased with duration of therapy.. 6.2 Postmarketing Experience. The following additional adverse events have been reported in postmarketing experience with finasteride tablets mg. Because these events are reported voluntarily from population of uncertain size, it is not always possible to reliably estimate their frequency or establish causal relationship to drug exposure:- hypersensitivity reactions, such as pruritus, urticaria, and angioedema (including swelling of the lips, tongue, throat, and face) testicular pain hematospermia- sexual dysfunction that continued after discontinuation of treatment, including erectile dysfunction, decreased libido and ejaculation disorders (e.g. reduced ejaculate volume). These events were reported rarely in men taking finasteride tablets mg for the treatment of BPH. Most men were older and were taking concomitant medications and/or had co-morbid conditions. The independent role of finasteride tablets mg in these events is unknown.- male infertility and/or poor seminal quality were reported rarely in men taking finasteride tablets mg for the treatment of BPH. Normalization or improvement of poor seminal quality has been reported after discontinuation of finasteride. The independent role of finasteride tablets mg in these events is unknown. depression- male breast cancer. The following additional adverse event related to sexual dysfunction that continued after discontinuation of treatment has been reported in postmarketing experience with finasteride at lower doses used to treat male pattern baldness. Because the event is reported voluntarily from population of uncertain size, it is not always possible to reliably estimate its frequency or establish causal relationship to drug exposure:- orgasm disorders.

CARCINOGENESIS & MUTAGENESIS & IMPAIRMENT OF FERTILITY SECTION.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility. Carcinogenesis No evidence of tumorigenic effect was observed in 24-month study in Sprague-Dawley rats receiving doses of finasteride up to 160 mg/kg/day in males and 320 mg/kg/day in females. These doses produced respective systemic exposure in rats of 111 and 274 times those observed in man receiving the recommended human dose of mg/day. All exposure calculations were based on calculated AUC(0-24 hr) for animals and mean AUC(0-24 hr) for man (0.4 mcgohr/mL). In 19 month carcinogenicity study in CD-1 mice, statistically significant (p<=0.05) increase in the incidence of testicular Leydig cell adenomas was observed at 228 times the human exposure (250 mg/kg/day). In mice at 23 times the human exposure, estimated (25 mg/kg/day) and in rats at 39 times the human exposure (40 mg/kg/day) an increase in the incidence of Leydig cell hyperplasia was observed. positive correlation between the proliferative changes in the Leydig cells and an increase in serum LH levels (2 to fold above control) has been demonstrated in both rodent species treated with high doses of finasteride. No drug-related Leydig cell changes were seen in either rats or dogs treated with finasteride for year at 30 and 350 times (20 mg/kg/day and 45 mg/kg/day, respectively) or in mice treated for 19 months at 2.3 times the human exposure, estimated (2.5 mg/kg/day). Mutagenesis No evidence of mutagenicity was observed in an in vitro bacterial mutagenesis assay, mammalian cell mutagenesis assay, or in an in vitro alkaline elution assay. In an in vitro chromosome aberration assay, using Chinese hamster ovary cells, there was slight increase in chromosome aberrations. These concentrations correspond to 4,000 to 5,000 times the peak plasma levels in man given total dose of mg. In an in vivo chromosome aberration assay in mice, no treatment-related increase in chromosome aberration was observed with finasteride at the maximum tolerated dose of 250 mg/kg/day (228 times the human exposure) as determined in the carcinogenicity studies. Impairment of Fertility In sexually mature male rabbits treated with finasteride at 543 times the human exposure (80 mg/kg/day) for up to 12 weeks, no effect on fertility, sperm count, or ejaculate volume was seen. In sexually mature male rats treated with 61 times the human exposure (80 mg/kg/day), there were no significant effects on fertility after or 12 weeks of treatment; however, when treatment was continued for up to 24 or 30 weeks, there was an apparent decrease in fertility, fecundity and an associated significant decrease in the weights of the seminal vesicles and prostate. All these effects were reversible within weeks of discontinuation of treatment. No drug-related effect on testes or on mating performance has been seen in rats or rabbits. This decrease in fertility in finasteride-treated rats is secondary to its effect on accessory sex organs (prostate and seminal vesicles) resulting in failure to form seminal plug. The seminal plug is essential for normal fertility in rats and is not relevant in man.

CLINICAL PHARMACOLOGY SECTION.

12 CLINICAL PHARMACOLOGY. 12.1 Mechanism of Action. The development and enlargement of the prostate gland is dependent on the potent androgen, 5-dihydrotestosterone (DHT). Type II 5-reductase metabolizes testosterone to DHT in the prostate gland, liver and skin. DHT induces androgenic effects by binding to androgen receptors in the cell nuclei of these organs. Finasteride is competitive and specific inhibitor of Type II 5-reductase with which it slowly forms stable enzyme complex. Turnover from this complex is extremely slow (t 1/2 30 days). This has been demonstrated both in vivo and in vitro. Finasteride has no affinity for the androgen receptor. In man, the 5-reduced steroid metabolites in blood and urine are decreased after administration of finasteride.. 12.2 Pharmacodynamics. In man, single mg oral dose of finasteride tablets produces rapid reduction in serum DHT concentration, with the maximum effect observed hours after the first dose. The suppression of DHT is maintained throughout the 24 hour dosing interval and with continued treatment. Daily dosing of finasteride tablets at mg/day for up to years has been shown to reduce the serum DHT concentration by approximately 70%. The median circulating level of testosterone increased by approximately 10 to 20% but remained within the physiologic range. In separate study in healthy men treated with finasteride mg per day (n=82) or placebo (n=69), mean circulating levels of testosterone and estradiol were increased by approximately 15% as compared to baseline, but these remained within the physiologic range. In patients receiving finasteride tablets mg/day, increases of about 10% were observed in luteinizing hormone (LH) and follicle-stimulating hormone (FSH), but levels remained within the normal range. In healthy volunteers, treatment with finasteride tablets mg did not alter the response of LH and FSH to gonadotropin-releasing hormone indicating that the hypothalamic-pituitary-testicular axis was not affected. In patients with BPH, finasteride tablets mg have no effect on circulating levels of cortisol, prolactin, thyroid-stimulating hormone, or thyroxine. No clinically meaningful effect was observed on the plasma lipid profile (i.e., total cholesterol, low density lipoproteins, high density lipoproteins and triglycerides) or bone mineral density. Adult males with genetically inherited Type II 5-reductase deficiency also have decreased levels of DHT. Except for the associated urogenital defects present at birth, no other clinical abnormalities related to Type II 5-reductase deficiency have been observed in these individuals. These individuals have small prostate gland throughout life and do not develop BPH. In patients with BPH treated with finasteride (1 to 100 mg/day) for to 10 days prior to prostatectomy, an approximate 80% lower DHT content was measured in prostatic tissue removed at surgery, compared to placebo; testosterone tissue concentration was increased up to 10 times over pretreatment levels, relative to placebo. Intraprostatic content of PSA was also decreased. In healthy male volunteers treated with finasteride tablets mg for 14 days, discontinuation of therapy resulted in return of DHT levels to pretreatment levels in approximately weeks. In patients treated for three months, prostate volume, which declined by approximately 20%, returned to close to baseline value after approximately three months of discontinuation of therapy.. 12.3 Pharmacokinetics. AbsorptionIn study of 15 healthy young subjects, the mean bioavailability of finasteride mg tablets was 63% (range 34 to 108%), based on the ratio of area under the curve (AUC) relative to an intravenous (IV) reference dose. Maximum finasteride plasma concentration averaged 37 ng/mL (range, 27 to 49 ng/mL) and was reached to hours postdose. Bioavailability of finasteride was not affected by food. DistributionMean steady-state volume of distribution was 76 liters (range, 44 to 96 liters). Approximately 90% of circulating finasteride is bound to plasma proteins. There is slow accumulation phase for finasteride after multiple dosing. After dosing with mg/day of finasteride for 17 days, plasma concentrations of finasteride were 47 and 54% higher than after the first dose in men 45 to 60 years old (n=12) and >=70 years old (n=12), respectively. Mean trough concentrations after 17 days of dosing were 6.2 ng/mL (range, 2.4- to 9.8 ng/mL) and 8.1 ng/mL (range, 1.8 to 19.7 ng/mL), respectively, in the two age groups. Although steady state was not reached in this study, mean trough plasma concentration in another study in patients with BPH (mean age, 65 years) receiving mg/day was 9.4 ng/mL (range, 7.1 to 13.3 ng/mL; n=22) after over year of dosing. Finasteride has been shown to cross the blood brain barrier but does not appear to distribute preferentially to the CSF. In studies of healthy subjects (n=69) receiving finasteride tablets mg/day for to 24 weeks, finasteride concentrations in semen ranged from undetectable (<0.1 ng/mL) to 10.54 ng/mL. In an earlier study using less sensitive assay, finasteride concentrations in the semen of 16 subjects receiving finasteride tablets mg/day ranged from undetectable (<1 ng/mL) to 21 ng/mL. Thus, based on 5 mL ejaculate volume, the amount of finasteride in semen was estimated to be 50 to 100 fold less than the dose of finasteride (5 mcg) that had no effect on circulating DHT levels in men [see also Use in Specific Populations (8.1)]. MetabolismFinasteride is extensively metabolized in the liver, primarily via the cytochrome P450 3A4 enzyme subfamily. Two metabolites, the t-butyl side chain monohydroxylated and monocarboxylic acid metabolites, have been identified that possess no more than 20% of the 5-reductase inhibitory activity of finasteride. ExcretionIn healthy young subjects (n=15), mean plasma clearance of finasteride was 165 mL/min (range, 70 to 279 mL/min) and mean elimination half-life in plasma was hours (range, to 16 hours). Following an oral dose of 14C-finasteride in man (n=6), mean of 39% (range, 32 to 46%) of the dose was excreted in the urine in the form of metabolites; 57% (range, 51 to 64%) was excreted in the feces.The mean terminal half-life of finasteride in subjects >=70 years of age was approximately hours (range, to 15 hours; n=12), compared with hours (range, to 12 hours; n=12) in subjects 45 to 60 years of age. As result, mean AUC(0-24 hr) after 17 days of dosing was 15% higher in subjects >=70 years of age than in subjects 45 to 60 years of age (p=0.02).Table 3: Mean (SD) Pharmacokinetic Parameters in Healthy Young Subjects (n=15) Mean (+- SD)Bioavailability 63% (34 to 108%)Range Clearance (mL/min) 165 (55) Volume of Distribution (L) 76 (14) Half-Life (hours) 6.2 (2.1) PediatricFinasteride pharmacokinetics have not been investigated in patients <18 years of age. Finasteride is not indicated for use in pediatric patients [see Warnings and Precautions (5.4), Use in Specific Populations (8.4)]. Gender Finasteride is not indicated for use in females [see Contraindications (4), Warnings and Precautions (5.3 and 5.4), Use in Specific Populations (8.1), and How Supplied/Storage and Handling (16)]. GeriatricNo dosage adjustment is necessary in the elderly. Although the elimination rate of finasteride is decreased in the elderly, these findings are of no clinical significance. [See Clinical Pharmacology (12.3) and Use in Specific Populations (8.5).]Table 4: Mean (SD) Noncompartmental Pharmacokinetic Parameters After Multiple Doses of mg/day in Older Men Mean (+- SD) 45 to 60 years old (n=12)>=70 years old (n=12)AUC (ngohr/mL) 389 (98) 463 (186) Peak Concentration (ng/mL) 46.2 (8.7) 48.4 (14.7) Time to Peak (hours) 1.8 (0.7) 1.8 (0.6) Half-Life (hours)First-dose values; all other parameters are last-dose values (1.5) 8.2 (2.5) RaceThe effect of race on finasteride pharmacokinetics has not been studied.Hepatic ImpairmentThe effect of hepatic impairment on finasteride pharmacokinetics has not been studied. Caution should be exercised in the administration of finasteride tablets mg in those patients with liver function abnormalities, as finasteride is metabolized extensively in the liver.Renal Impairment No dosage adjustment is necessary in patients with renal impairment. In patients with chronic renal impairment, with creatinine clearances ranging from to 55 mL/min, AUC, maximum plasma concentration, half-life, and protein binding after single dose of 14C-finasteride were similar to values obtained in healthy volunteers. Urinary excretion of metabolites was decreased in patients with renal impairment. This decrease was associated with an increase in fecal excretion of metabolites. Plasma concentrations of metabolites were significantly higher in patients with renal impairment (based on 60% increase in total radioactivity AUC). However, finasteride has been well tolerated in BPH patients with normal renal function receiving up to 80 mg/day for 12 weeks, where exposure of these patients to metabolites would presumably be much greater.

CLINICAL STUDIES SECTION.

14 CLINICAL STUDIES. 14.1 Monotherapy. Finasteride tablets mg/day were initially evaluated in patients with symptoms of BPH and enlarged prostates by digital rectal examination in two year, placebo-controlled, randomized, double-blind studies and their year open extensions. Finasteride tablets mg were further evaluated in the long-term efficacy and safety study, double-blind, randomized, placebo-controlled, year, multicenter study. 3,040 patients between the ages of 45 and 78, with moderate to severe symptoms of BPH and an enlarged prostate upon digital rectal examination, were randomized into the study (1,524 to finasteride, 1,516 to placebo) and 3,016 patients were evaluable for efficacy. 1,883 patients completed the year study (1,000 in the finasteride group, 883 in the placebo group). Effect on Symptom ScoreSymptoms were quantified using score similar to the American Urological Association Symptom Score, which evaluated both obstructive symptoms (impairment of size and force of stream, sensation of incomplete bladder emptying, delayed or interrupted urination) and irritative symptoms (nocturia, daytime frequency, need to strain or push the flow of urine) by rating on 0 to scale for six symptoms and 0 to scale for one symptom, for total possible score of 34. Patients in the long-term efficacy and safety study had moderate to severe symptoms at baseline (mean of approximately 15 points on 0 to 34 point scale). Patients randomized to finasteride tablets mg who remained on therapy for years had mean (+- SD) decrease in symptom score of 3.3 (+- 5.8) points compared with 1.3 (+- 5.6) points in the placebo group. (See Figure 1.) statistically significant improvement in symptom score was evident at year in patients treated with finasteride tablets mg vs placebo (-2.3 vs -1.6), and this improvement continued through Year 4. Results seen in earlier studies were comparable to those seen in the long-term efficacy and safety study. Although an early improvement in urinary symptoms was seen in some patients, therapeutic trial of at least months was generally necessary to assess whether beneficial response in symptom relief had been achieved. The improvement in BPH symptoms was seen during the first year and maintained throughout an additional years of open extension studies. Effect on Acute Urinary Retention and the Need for Surgery In long-term efficacy and safety study, efficacy was also assessed by evaluating treatment failures. Treatment failure was prospectively defined as BPH-related urological events or clinical deterioration, lack of improvement and/or the need for alternative therapy. BPH-related urological events were defined as urological surgical intervention and acute urinary retention requiring catheterization. Complete event information was available for 92% of the patients. The following table (Table 5) summarizes the results. Table 5: All Treatment Failures in The Long-Term Efficacy And Safety Study Patients (%) EventPlacebo N=1,503Finasteride N=1,513Relative Risk+ 95% CIP Value+ All Treatment Failures 37.1 26.2 0.68 (0.57 to 0.79) <0.001 Surgical Interventions for BPH 10.1 4.6 0.45 (0.32 to 0.63) <0.001 Acute Urinary Retention Requiring Catheterization 6.6 2.8 0.43 (0.28 to 0.66) <0.001 Two consecutive symptom scores >=20 9.2 6.7 Bladder Stone 0.4 0.5 Incontinence 2.1 1.7 Renal Failure 0.5 0.6 UTI 5.7 4.9 Discontinuation due to worsening of BPH, lack of improvement, or to receive other medical treatment 21.8 13.3 patients with multiple events may be counted more than once for each type of event +Hazard ratio based on log rank test Compared with placebo, finasteride tablets mg were associated with significantly lower risk for acute urinary retention or the need for BPH-related surgery [13.2% for placebo vs 6.6% for finasteride tablets mg; 51% reduction in risk, 95% CI: (34 to 63%)]. Compared with placebo, finasteride tablets mg were associated with significantly lower risk for surgery [10.1% for placebo vs 4.6% for finasteride tablets mg; 55% reduction in risk, 95% CI: (37 to 68%)] and with significantly lower risk of acute urinary retention [6.6% for placebo vs 2.8% for finasteride tablets mg; 57% reduction in risk, 95% CI: (34 to 72%)]; see Figures and 3.Effect on Maximum Urinary Flow RateIn the patients in the long-term efficacy and safety study who remained on therapy for the duration of the study and had evaluable urinary flow data, finasteride tablets mg increased maximum urinary flow rate by 1.9 mL/sec compared with 0.2 mL/sec in the placebo group. There was clear difference between treatment groups in maximum urinary flow rate in favor of finasteride tablets mg by month (1 vs 0.3 mL/sec) which was maintained throughout the study. In the earlier year studies, increase in maximum urinary flow rate was comparable to the long-term efficacy and safety study and was maintained through the first year and throughout an additional years of open extension studies. Effect on Prostate Volume In long-term efficacy and safety study, prostate volume was assessed yearly by magnetic resonance imaging (MRI) in subset of patients. In patients treated with finasteride tablets mg who remained on therapy, prostate volume was reduced compared with both baseline and placebo throughout the year study. Finasteride tablets mg decreased prostate volume by 17.9% (from 55.9 mL at baseline to 45.8 mL at years) compared with an increase of 14.1% (from 51.3 mL to 58.5 mL) in the placebo group (p<0.001). (See Figure 4.) Results seen in earlier studies were comparable to those seen in the long-term efficacy and safety study. Mean prostate volume at baseline ranged between 40 to 50 mL. The reduction in prostate volume was seen during the first year and maintained throughout an additional five years of open extension studies. Prostate Volume as Predictor of Therapeutic Response meta-analysis combining year data from seven double-blind, placebo-controlled studies of similar design, including 4,491 patients with symptomatic BPH, demonstrated that, in patients treated with finasteride tablets mg, the magnitude of symptom response and degree of improvement in maximum urinary flow rate were greater in patients with an enlarged prostate at baseline. figure 1.jpg. figure 2.jpg. finasteride-figure-3.jpg. finasteride-figure-4.jpg. 14.2 Combination with Alpha-Blocker Therapy. The Medical Therapy of Prostatic Symptoms (MTOPS) Trial was double-blind, randomized, placebo-controlled, multicenter, to year study (average years) in 3,047 men with symptomatic BPH, who were randomized to receive finasteride tablets mg/day (n=768), doxazosin or mg/day (n=756), the combination of finasteride tablets mg/day and doxazosin or mg/day (n=786), or placebo (n=737). All participants underwent weekly titration of doxazosin (or its placebo) from to to to mg/day. Only those who tolerated the or mg dose level were kept on doxazosin (or its placebo) in the study. The participants final tolerated dose (either mg or mg) was administered beginning at end-Week 4. The final doxazosin dose was administered once per day, at bedtime. The mean patient age at randomization was 62.6 years (+-7.3 years). Patients were Caucasian (82%), African American (9%), Hispanic (7%), Asian (1%) or Native American (<1%). The mean duration of BPH symptoms was 4.7 years (+-4.6 years). Patients had moderate to severe BPH symptoms at baseline with mean AUA symptom score of approximately 17 out of 35 points. Mean maximum urinary flow rate was 10.5 mL/sec (+-2.6 mL/sec). The mean prostate volume as measured by transrectal ultrasound was 36.3 mL (+-20.1 mL). Prostate volume was <=20 mL in 16% of patients, >=50 mL in 18% of patients and between 21 and 49 mL in 66% of patients. The primary endpoint was composite measure of the first occurrence of any of the following five outcomes: >=4 point confirmed increase from baseline in symptom score, acute urinary retention, BPH-related renal insufficiency (creatinine rise), recurrent urinary tract infections or urosepsis, or incontinence. Compared to placebo, treatment with finasteride tablets mg, doxazosin, or combination therapy resulted in reduction in the risk of experiencing one of these five outcome events by 34% (p=0.002), 39% (p<0.001), and 67% (p<0.001), respectively. Combination therapy resulted in significant reduction in the risk of the primary endpoint compared to treatment with finasteride tablets mg alone (49%; p<=0.001) or doxazosin alone (46%; p<=0.001). (See Table 6.) Table 6: Count and Percent Incidence of Primary Outcome Events by Treatment Group in MTOPS EventTreatment GroupPlacebo N=737N (%)Doxazosin N=756N (%)Finasteride N=768N (%)Combination N=786N (%)Total N=3,047N (%)AUA 4-point rise 100 (13.6) 59 (7.8) 74 (9.6) 41 (5.2) 274 (9) Acute Urinary Retention 18 (2.4) 13 (1.7) (0.8) (0.5) 41 (1.3) Incontinence (1.1) 11 (1.5) (1.2) (0.4) 31 (1) Recurrent UTI/urosepsis (0.3) (0.3) (0) (0.1) (0.2) Creatinine rise (0) (0) (0) (0) (0) Total Events 128 (17.4) 85 (11.2) 89 (11.6) 49 (6.2) 351 (11.5) The majority of the events (274 out of 351; 78%) was confirmed >=4 point increase in symptom score, referred to as symptom score progression. The risk of symptom score progression was reduced by 30% (p=0.016), 46% (p<0.001), and 64% (p<0.001) in patients treated with finasteride tablets mg, doxazosin, or the combination, respectively, compared to patients treated with placebo (see Figure 5). Combination therapy significantly reduced the risk of symptom score progression compared to the effect of finasteride tablets mg alone (p<0.001) and compared to doxazosin alone (p=0.037). Treatment with finasteride tablets mg, doxazosin or the combination of finasteride tablets mg with doxazosin, reduced the mean symptom score from baseline at year 4. Table provides the mean change from baseline for AUA symptom score by treatment group for patients who remained on therapy for four years. Table 7: Change From Baseline in AUA Symptom Score by Treatment Group at Year in MTOPS Placebo N=534Doxazosin N=582Finasteride N=565Combination N=598Baseline Mean (SD) 16.8 (6) 17 (5.9) 17.1 (6) 16.8 (5.8) Mean Change AUA Symptom Score (SD) -4.9 (5.8) -6.6 (6.1) -5.6 (5.9) -7.4 (6.3) Comparison to Placebo (95% CI) -1.8(-2.5, -1.1) -0.7(-1.4, 0) -2.5(-3.2, -1.8) Comparison to Doxazosin alone (95% CI) -0.7(-1.4, 0) Comparison to Finasteride alone (95% CI) -1.8(-2.5, -1.1) The results of MTOPS are consistent with the findings of the 4-year, placebo-controlled long-term efficacy and safety study [see Clinical Studies (14.1)] in that treatment with finasteride tablets mg reduce the risk of acute urinary retention and the need for BPH-related surgery. In MTOPS, the risk of developing acute urinary retention was reduced by 67% in patients treated with finasteride tablets mg compared to patients treated with placebo (0.8% for finasteride tablets mg and 2.4% for placebo). Also, the risk of requiring BPH-related invasive therapy was reduced by 64% in patients treated with finasteride tablets mg compared to patients treated with placebo (2% for finasteride tablets mg and 5.4% for placebo). finasteride-figure-5.jpg. 14.3 Summary of Clinical Studies. The data from these studies, showing improvement in BPH-related symptoms, reduction in treatment failure (BPH-related urological events), increased maximum urinary flow rates, and decreasing prostate volume, suggest that finasteride tablets mg arrest the disease process of BPH in men with an enlarged prostate.

INDICATIONS & USAGE SECTION.

1 INDICATIONS AND USAGE. Finasteride tablets mg are 5-reductase inhibitors, indicated for the treatment of symptomatic benign prostatic hyperplasia (BPH) in men with an enlarged prostate to (1.1): Improve symptoms Reduce the risk of acute urinary retention Reduce the risk of the need for surgery including transurethral resection of the prostate (TURP) and prostatectomy. Finasteride tablets mg administered in combination with the alpha-blocker doxazosin is indicated to reduce the risk of symptomatic progression of BPH (a confirmed >=4 point increase in American Urological Association (AUA) symptom score) (1.2). Limitations of Use: Finasteride tablets mg are not approved for the prevention of prostate cancer (1.3). Improve symptoms Reduce the risk of acute urinary retention. Reduce the risk of the need for surgery including transurethral resection of the prostate (TURP) and prostatectomy. 1.1 Monotherapy. Finasteride tablets mg are indicated for the treatment of symptomatic benign prostatic hyperplasia (BPH) in men with an enlarged prostate to:- Improve symptoms Reduce the risk of acute urinary retention- Reduce the risk of the need for surgery including transurethral resection of the prostate (TURP) and prostatectomy. 1.2 Combination with Alpha-Blocker. Finasteride tablets mg administered in combination with the alpha-blocker doxazosin is indicated to reduce the risk of symptomatic progression of BPH (a confirmed >=4 point increase in American Urological Association (AUA) symptom score).. 1.3 Limitations of Use. Finasteride tablets mg are not approved for the prevention of prostate cancer.

CONTRAINDICATIONS SECTION.

4 CONTRAINDICATIONS. Finasteride tablets mg are contraindicated in the following:Hypersensitivity to any component of this medication.Pregnancy. Finasteride use is contraindicated in females when they are or may potentially be pregnant. Because of the ability of Type II 5-reductase inhibitors to inhibit the conversion of testosterone to 5-dihydrotestosterone (DHT), finasteride may cause abnormalities of the external genitalia of male fetus of pregnant female who receives finasteride. If this drug is used during pregnancy, or if pregnancy occurs while taking this drug, the pregnant female should be apprised of the potential hazard to the male fetus. [See also Warnings and Precautions (5.3), Use in Specific Populations (8.1), and How Supplied/Storage and Handling (16).] In female rats, low doses of finasteride administered during pregnancy have produced abnormalities of the external genitalia in male offspring.. Hypersensitivity to any component of this medication.. Pregnancy. Finasteride use is contraindicated in females when they are or may potentially be pregnant. Because of the ability of Type II 5-reductase inhibitors to inhibit the conversion of testosterone to 5-dihydrotestosterone (DHT), finasteride may cause abnormalities of the external genitalia of male fetus of pregnant female who receives finasteride. If this drug is used during pregnancy, or if pregnancy occurs while taking this drug, the pregnant female should be apprised of the potential hazard to the male fetus. [See also Warnings and Precautions (5.3), Use in Specific Populations (8.1), and How Supplied/Storage and Handling (16).] In female rats, low doses of finasteride administered during pregnancy have produced abnormalities of the external genitalia in male offspring.. Hypersensitivity to any components of this product (4).Females who are or may potentially be pregnant (4, 5.3, 8.1, 16).

DESCRIPTION SECTION.

11 DESCRIPTION. Finasteride, synthetic 4-azasteroid compound, is specific inhibitor of steroid Type II 5-reductase, an intracellular enzyme that converts the androgen testosterone into 5-dihydrotestosterone (DHT).Finasteride is 4-azaandrost-1-ene-17-carboxamide, N-(1,1-dimethylethyl)-3-oxo-,(5,17)-. The molecular formula of finasteride is C23H36N2O2 and its molecular weight is 372.55. Its structural formula is:Finasteride is white crystalline powder with melting point near 250C. It is freely soluble in chloroform and in lower alcohol solvents, but is practically insoluble in water. Finasteride tablets USP, mg for oral administration are film-coated tablets that contain mg of finasteride USP and the following inactive ingredients: lactose monohydrate, corn starch, microcrystalline cellulose, povidone, docusate sodium, talc, sodium starch glycolate type potato, magnesium stearate, hypromellose, polyethylene glycol, titanium dioxide, and FD&C Blue aluminum lake.. finasteride-structure.

DOSAGE & ADMINISTRATION SECTION.

2 DOSAGE AND ADMINISTRATION. Finasteride tablets mg may be administered with or without meals.. Finasteride tablets mg may be administered with or without meals (2).Monotherapy: One tablet (5 mg) taken once day (2.1).Combination with Doxazosin: One tablet (5 mg) taken once day in combination with the alpha-blocker doxazosin (2.2).. 2.1 Monotherapy. The recommended dose of finasteride tablets mg is one tablet (5 mg) taken once day [see Clinical Studies (14.1)].. 2.2 Combination with Alpha-Blocker. The recommended dose of finasteride tablets mg is one tablet (5 mg) taken once day in combination with the alpha-blocker doxazosin [see Clinical Studies (14.2)].

DOSAGE FORMS & STRENGTHS SECTION.

3 DOSAGE FORMS AND STRENGTHS. mg light blue, circular, film-coated tablets debossed with 715 on one side and plain on other side.. mg film-coated tablets (3).

DRUG INTERACTIONS SECTION.

7 DRUG INTERACTIONS. 7.1 Cytochrome P450-Linked Drug Metabolizing Enzyme System. No drug interactions of clinical importance have been identified. Finasteride does not appear to affect the cytochrome P450-linked drug metabolizing enzyme system. Compounds that have been tested in man have included antipyrine, digoxin, propranolol, theophylline, and warfarin and no clinically meaningful interactions were found.. 7.2 Other Concomitant Therapy. Although specific interaction studies were not performed, finasteride tablets mg were concomitantly used in clinical studies with acetaminophen, acetylsalicylic acid, -blockers, angiotensin-converting enzyme (ACE) inhibitors, analgesics, anti-convulsants, beta-adrenergic blocking agents, diuretics, calcium channel blockers, cardiac nitrates, HMG-CoA reductase inhibitors, nonsteroidal anti-inflammatory drugs (NSAIDs), benzodiazepines, H2 antagonists and quinolone anti-infectives without evidence of clinically significant adverse interactions.

FEMALES & MALES OF REPRODUCTIVE POTENTIAL SECTION.

8.3 Females and Males of Reproductive Potential. InfertilityFemalesFinasteride tablets mg is not indicated for use in females.Males Treatment with finasteride tablets mg for 24 weeks to evaluate semen parameters in healthy male volunteers revealed no clinically meaningful effects on sperm concentration, mobility, morphology, or pH. 0.6 mL (22.1%) median decrease in ejaculate volume with concomitant reduction in total sperm per ejaculate was observed. These parameters remained within the normal range and were reversible upon discontinuation of therapy with an average time to return to baseline of 84 weeks [see Warnings and Precautions (5.5)]. There have been postmarketing reports of male infertility and/or poor seminal quality; normalization or improvement of seminal quality has been reported after discontinuation of finasteride [see Adverse Reactions (6.2)].

GERIATRIC USE SECTION.

8.5 Geriatric Use. Of the total number of subjects included in the long-term efficacy and safety study, 1,480 and 105 subjects were 65 and over and 75 and over, respectively. No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in responses between the elderly and younger patients. No dosage adjustment is necessary in the elderly [see Clinical Pharmacology (12.3) and Clinical Studies (14)].

HOW SUPPLIED SECTION.

16 HOW SUPPLIED/STORAGE AND HANDLING. Finasteride tablets USP, mg are light blue, circular, film-coated tablets debossed with 715 on one side and plain on other side. They are supplied as follows:Bottles of 30 with Child Resistant Closure ................... NDC 47335-715-83Bottles of 90 with Child Resistant Closure ................... NDC 47335-715-81Bottles of 100 with Child Resistant Closure .................. NDC 47335-715-88Bottles of 100 ............ NDC 47335-715-08Bottles of 500 ............ NDC 47335-715-13Bottles of 1000 .......... NDC 47335-715-18 Storage and Handling Store at 20 to 25C (68 to 77F); excursions permitted between 15 and 30C (59 and 86F) [see USP Controlled Room Temperature]. Protect from light and keep container tightly closed. Females should not handle crushed or broken finasteride tablets mg when they are pregnant or may potentially be pregnant because of the possibility of absorption of finasteride and the subsequent potential risk to male fetus [see Warnings and Precautions (5.3) and Use in Specific Populations (8.1)].

INFORMATION FOR PATIENTS SECTION.

17 PATIENT COUNSELING INFORMATION. Advise the patient to read the FDA-approved patient labeling (Patient Information).. 17.1 Increased Risk of High-Grade Prostate Cancer. Patients should be informed that there was an increase in high-grade prostate cancer in men treated with 5-reductase inhibitors indicated for BPH treatment, including finasteride tablets mg, compared to those treated with placebo in studies looking at the use of these drugs to prevent prostate cancer [see Indications and Usage (1.3), Warnings and Precautions (5.2), and Adverse Reactions (6.1)]. 17.2 Exposure of Females Risk to Male Fetus. Physicians should inform patients that females who are pregnant or may potentially be pregnant should not handle crushed or broken finasteride tablets mg because of the possibility of absorption of finasteride and the subsequent potential risk to the male fetus. Finasteride tablets mg are coated and will prevent contact with the active ingredient during normal handling, provided that the tablets have not been broken or crushed. If female who is pregnant or may potentially be pregnant comes in contact with crushed or broken finasteride tablets mg, the contact area should be washed immediately with soap and water [see Contraindications (4), Warnings and Precautions (5.3), Use in Specific Populations (8.1) and How Supplied/Storage and Handling (16)]. 17.3 Additional Instructions. Physicians should inform patients that the volume of ejaculate may be decreased in some patients during treatment with finasteride tablets mg. This decrease does not appear to interfere with normal sexual function. However, impotence and decreased libido may occur in patients treated with finasteride tablets mg [see Adverse Reactions (6.1)]. Physicians should instruct their patients to promptly report any changes in their breasts such as lumps, pain or nipple discharge. Breast changes including breast enlargement, tenderness and neoplasm have been reported [see Adverse Reactions (6.1)]. Physicians should instruct their patients to read the patient package insert before starting therapy with finasteride tablets mg and to reread it each time the prescription is renewed so that they are aware of current information for patients regarding finasteride tablets mg.

LACTATION SECTION.

8.2 Lactation. Risk Summary Finasteride tablets mg are not indicated for use in females.

MECHANISM OF ACTION SECTION.

12.1 Mechanism of Action. The development and enlargement of the prostate gland is dependent on the potent androgen, 5-dihydrotestosterone (DHT). Type II 5-reductase metabolizes testosterone to DHT in the prostate gland, liver and skin. DHT induces androgenic effects by binding to androgen receptors in the cell nuclei of these organs. Finasteride is competitive and specific inhibitor of Type II 5-reductase with which it slowly forms stable enzyme complex. Turnover from this complex is extremely slow (t 1/2 30 days). This has been demonstrated both in vivo and in vitro. Finasteride has no affinity for the androgen receptor. In man, the 5-reduced steroid metabolites in blood and urine are decreased after administration of finasteride.

NONCLINICAL TOXICOLOGY SECTION.

13 NONCLINICAL TOXICOLOGY. 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility. Carcinogenesis No evidence of tumorigenic effect was observed in 24-month study in Sprague-Dawley rats receiving doses of finasteride up to 160 mg/kg/day in males and 320 mg/kg/day in females. These doses produced respective systemic exposure in rats of 111 and 274 times those observed in man receiving the recommended human dose of mg/day. All exposure calculations were based on calculated AUC(0-24 hr) for animals and mean AUC(0-24 hr) for man (0.4 mcgohr/mL). In 19 month carcinogenicity study in CD-1 mice, statistically significant (p<=0.05) increase in the incidence of testicular Leydig cell adenomas was observed at 228 times the human exposure (250 mg/kg/day). In mice at 23 times the human exposure, estimated (25 mg/kg/day) and in rats at 39 times the human exposure (40 mg/kg/day) an increase in the incidence of Leydig cell hyperplasia was observed. positive correlation between the proliferative changes in the Leydig cells and an increase in serum LH levels (2 to fold above control) has been demonstrated in both rodent species treated with high doses of finasteride. No drug-related Leydig cell changes were seen in either rats or dogs treated with finasteride for year at 30 and 350 times (20 mg/kg/day and 45 mg/kg/day, respectively) or in mice treated for 19 months at 2.3 times the human exposure, estimated (2.5 mg/kg/day). Mutagenesis No evidence of mutagenicity was observed in an in vitro bacterial mutagenesis assay, mammalian cell mutagenesis assay, or in an in vitro alkaline elution assay. In an in vitro chromosome aberration assay, using Chinese hamster ovary cells, there was slight increase in chromosome aberrations. These concentrations correspond to 4,000 to 5,000 times the peak plasma levels in man given total dose of mg. In an in vivo chromosome aberration assay in mice, no treatment-related increase in chromosome aberration was observed with finasteride at the maximum tolerated dose of 250 mg/kg/day (228 times the human exposure) as determined in the carcinogenicity studies. Impairment of Fertility In sexually mature male rabbits treated with finasteride at 543 times the human exposure (80 mg/kg/day) for up to 12 weeks, no effect on fertility, sperm count, or ejaculate volume was seen. In sexually mature male rats treated with 61 times the human exposure (80 mg/kg/day), there were no significant effects on fertility after or 12 weeks of treatment; however, when treatment was continued for up to 24 or 30 weeks, there was an apparent decrease in fertility, fecundity and an associated significant decrease in the weights of the seminal vesicles and prostate. All these effects were reversible within weeks of discontinuation of treatment. No drug-related effect on testes or on mating performance has been seen in rats or rabbits. This decrease in fertility in finasteride-treated rats is secondary to its effect on accessory sex organs (prostate and seminal vesicles) resulting in failure to form seminal plug. The seminal plug is essential for normal fertility in rats and is not relevant in man.

OVERDOSAGE SECTION.

10 OVERDOSAGE. Patients have received single doses of finasteride tablets mg up to 400 mg and multiple doses of finasteride tablets mg up to 80 mg/day for three months without adverse effects. Until further experience is obtained, no specific treatment for an overdose with finasteride tablets mg can be recommended. Significant lethality was observed in male and female mice at single oral doses of 1,500 mg/m2 (500 mg/kg) and in female and male rats at single oral doses of 2,360 mg/m2 (400 mg/kg) and 5,900 mg/m2 (1,000 mg/kg), respectively.

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL.

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL LABEL 5 mg. NDC 47335-715-83 Finasteride Tablets, USP mg Rx only 30 Tablets SUN PHARMA PHARMACIST: Dispense with Patient Information to each patient. finasteride-label.jpg.

PEDIATRIC USE SECTION.

8.4 Pediatric Use. Finasteride tablets mg are not indicated for use in pediatric patients. Safety and effectiveness in pediatric patients have not been established.

PHARMACODYNAMICS SECTION.

12.2 Pharmacodynamics. In man, single mg oral dose of finasteride tablets produces rapid reduction in serum DHT concentration, with the maximum effect observed hours after the first dose. The suppression of DHT is maintained throughout the 24 hour dosing interval and with continued treatment. Daily dosing of finasteride tablets at mg/day for up to years has been shown to reduce the serum DHT concentration by approximately 70%. The median circulating level of testosterone increased by approximately 10 to 20% but remained within the physiologic range. In separate study in healthy men treated with finasteride mg per day (n=82) or placebo (n=69), mean circulating levels of testosterone and estradiol were increased by approximately 15% as compared to baseline, but these remained within the physiologic range. In patients receiving finasteride tablets mg/day, increases of about 10% were observed in luteinizing hormone (LH) and follicle-stimulating hormone (FSH), but levels remained within the normal range. In healthy volunteers, treatment with finasteride tablets mg did not alter the response of LH and FSH to gonadotropin-releasing hormone indicating that the hypothalamic-pituitary-testicular axis was not affected. In patients with BPH, finasteride tablets mg have no effect on circulating levels of cortisol, prolactin, thyroid-stimulating hormone, or thyroxine. No clinically meaningful effect was observed on the plasma lipid profile (i.e., total cholesterol, low density lipoproteins, high density lipoproteins and triglycerides) or bone mineral density. Adult males with genetically inherited Type II 5-reductase deficiency also have decreased levels of DHT. Except for the associated urogenital defects present at birth, no other clinical abnormalities related to Type II 5-reductase deficiency have been observed in these individuals. These individuals have small prostate gland throughout life and do not develop BPH. In patients with BPH treated with finasteride (1 to 100 mg/day) for to 10 days prior to prostatectomy, an approximate 80% lower DHT content was measured in prostatic tissue removed at surgery, compared to placebo; testosterone tissue concentration was increased up to 10 times over pretreatment levels, relative to placebo. Intraprostatic content of PSA was also decreased. In healthy male volunteers treated with finasteride tablets mg for 14 days, discontinuation of therapy resulted in return of DHT levels to pretreatment levels in approximately weeks. In patients treated for three months, prostate volume, which declined by approximately 20%, returned to close to baseline value after approximately three months of discontinuation of therapy.

PHARMACOKINETICS SECTION.

12.3 Pharmacokinetics. AbsorptionIn study of 15 healthy young subjects, the mean bioavailability of finasteride mg tablets was 63% (range 34 to 108%), based on the ratio of area under the curve (AUC) relative to an intravenous (IV) reference dose. Maximum finasteride plasma concentration averaged 37 ng/mL (range, 27 to 49 ng/mL) and was reached to hours postdose. Bioavailability of finasteride was not affected by food. DistributionMean steady-state volume of distribution was 76 liters (range, 44 to 96 liters). Approximately 90% of circulating finasteride is bound to plasma proteins. There is slow accumulation phase for finasteride after multiple dosing. After dosing with mg/day of finasteride for 17 days, plasma concentrations of finasteride were 47 and 54% higher than after the first dose in men 45 to 60 years old (n=12) and >=70 years old (n=12), respectively. Mean trough concentrations after 17 days of dosing were 6.2 ng/mL (range, 2.4- to 9.8 ng/mL) and 8.1 ng/mL (range, 1.8 to 19.7 ng/mL), respectively, in the two age groups. Although steady state was not reached in this study, mean trough plasma concentration in another study in patients with BPH (mean age, 65 years) receiving mg/day was 9.4 ng/mL (range, 7.1 to 13.3 ng/mL; n=22) after over year of dosing. Finasteride has been shown to cross the blood brain barrier but does not appear to distribute preferentially to the CSF. In studies of healthy subjects (n=69) receiving finasteride tablets mg/day for to 24 weeks, finasteride concentrations in semen ranged from undetectable (<0.1 ng/mL) to 10.54 ng/mL. In an earlier study using less sensitive assay, finasteride concentrations in the semen of 16 subjects receiving finasteride tablets mg/day ranged from undetectable (<1 ng/mL) to 21 ng/mL. Thus, based on 5 mL ejaculate volume, the amount of finasteride in semen was estimated to be 50 to 100 fold less than the dose of finasteride (5 mcg) that had no effect on circulating DHT levels in men [see also Use in Specific Populations (8.1)]. MetabolismFinasteride is extensively metabolized in the liver, primarily via the cytochrome P450 3A4 enzyme subfamily. Two metabolites, the t-butyl side chain monohydroxylated and monocarboxylic acid metabolites, have been identified that possess no more than 20% of the 5-reductase inhibitory activity of finasteride. ExcretionIn healthy young subjects (n=15), mean plasma clearance of finasteride was 165 mL/min (range, 70 to 279 mL/min) and mean elimination half-life in plasma was hours (range, to 16 hours). Following an oral dose of 14C-finasteride in man (n=6), mean of 39% (range, 32 to 46%) of the dose was excreted in the urine in the form of metabolites; 57% (range, 51 to 64%) was excreted in the feces.The mean terminal half-life of finasteride in subjects >=70 years of age was approximately hours (range, to 15 hours; n=12), compared with hours (range, to 12 hours; n=12) in subjects 45 to 60 years of age. As result, mean AUC(0-24 hr) after 17 days of dosing was 15% higher in subjects >=70 years of age than in subjects 45 to 60 years of age (p=0.02).Table 3: Mean (SD) Pharmacokinetic Parameters in Healthy Young Subjects (n=15) Mean (+- SD)Bioavailability 63% (34 to 108%)Range Clearance (mL/min) 165 (55) Volume of Distribution (L) 76 (14) Half-Life (hours) 6.2 (2.1) PediatricFinasteride pharmacokinetics have not been investigated in patients <18 years of age. Finasteride is not indicated for use in pediatric patients [see Warnings and Precautions (5.4), Use in Specific Populations (8.4)]. Gender Finasteride is not indicated for use in females [see Contraindications (4), Warnings and Precautions (5.3 and 5.4), Use in Specific Populations (8.1), and How Supplied/Storage and Handling (16)]. GeriatricNo dosage adjustment is necessary in the elderly. Although the elimination rate of finasteride is decreased in the elderly, these findings are of no clinical significance. [See Clinical Pharmacology (12.3) and Use in Specific Populations (8.5).]Table 4: Mean (SD) Noncompartmental Pharmacokinetic Parameters After Multiple Doses of mg/day in Older Men Mean (+- SD) 45 to 60 years old (n=12)>=70 years old (n=12)AUC (ngohr/mL) 389 (98) 463 (186) Peak Concentration (ng/mL) 46.2 (8.7) 48.4 (14.7) Time to Peak (hours) 1.8 (0.7) 1.8 (0.6) Half-Life (hours)First-dose values; all other parameters are last-dose values (1.5) 8.2 (2.5) RaceThe effect of race on finasteride pharmacokinetics has not been studied.Hepatic ImpairmentThe effect of hepatic impairment on finasteride pharmacokinetics has not been studied. Caution should be exercised in the administration of finasteride tablets mg in those patients with liver function abnormalities, as finasteride is metabolized extensively in the liver.Renal Impairment No dosage adjustment is necessary in patients with renal impairment. In patients with chronic renal impairment, with creatinine clearances ranging from to 55 mL/min, AUC, maximum plasma concentration, half-life, and protein binding after single dose of 14C-finasteride were similar to values obtained in healthy volunteers. Urinary excretion of metabolites was decreased in patients with renal impairment. This decrease was associated with an increase in fecal excretion of metabolites. Plasma concentrations of metabolites were significantly higher in patients with renal impairment (based on 60% increase in total radioactivity AUC). However, finasteride has been well tolerated in BPH patients with normal renal function receiving up to 80 mg/day for 12 weeks, where exposure of these patients to metabolites would presumably be much greater.

PREGNANCY SECTION.

8.1 Pregnancy. Risk SummaryFinasteride tablets mg is contraindicated in pregnant females and not indicated for use in females. Based on animal studies and the mechanism of action, finasteride tablets mg may cause abnormal development of external genitalia in male fetus if administered to pregnant female [see Warnings and Precautions (5.3) and Clinical Pharmacology (12.1)]. In an embryo-fetal development study in rats, there was dose-dependent increase in hypospadias that occurred in 3.6 to 100% of male offspring of pregnant rats administered oral finasteride during the period of major organogenesis at doses approximately 0.1 to 86 times the maximum recommended human dose (MRHD) of mg/day (based on AUC at animal doses of 0.1 to 100 mg/kg/day). Decreased prostatic and seminal vesicular weights, delayed preputial separation and transient nipple development were also observed in male offspring at oral maternal doses approximately 0.03 times the MRHD (based on AUC at animal dose of 0.03 mg/kg/day), along with decreased anogenital distance in male offspring at oral maternal doses approximately 0.003 times the MRHD (based on AUC at animal dose of 0.003 mg/kg/day). Finasteride tablets mg are Type II 5-reductase inhibitors that prevent conversion of testosterone to 5-dihydrotestosterone (DHT), hormone necessary for normal development of male genitalia. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential hazard to the male fetus.Abnormal male genital development is an expected consequence when conversion of testosterone to 5-dihydrotestosterone (DHT) is inhibited by 5-reductase inhibitors. These outcomes are similar to those reported in male infants with genetic 5-reductase deficiency. Females could be exposed to finasteride through contact with crushed or broken finasteride tablets mg or semen from male partner taking finasteride tablets mg. With regard to finasteride exposure through the skin, finasteride tablets mg are coated and will prevent skin contact with finasteride during normal handling if the tablets have not been crushed or broken. Females who are pregnant or may potentially be pregnant should not handle crushed or broken finasteride tablets mg because of possible exposure of male fetus. With regard to potential finasteride exposure through semen, three studies have been conducted that measured finasteride concentrations in semen in men receiving finasteride tablets mg/day. In these studies the highest amount of finasteride in semen was estimated to be 50-to 100-fold less than the dose of finasteride (5 mcg) that had no effect on circulating DHT levels in men [see Data and Clinical Pharmacology (12.3)]. Data Human DataIn studies of healthy subjects (n=69) receiving finasteride tablets mg/day for 6-24 weeks, finasteride concentrations in semen ranged from undetectable (<0.1 ng/mL) to 10.54 ng/mL. In an earlier study using less sensitive assay, finasteride concentrations in semen of 16 subjects receiving finasteride tablets mg/day ranged from undetectable (<1.0 ng/mL) to 21 ng/mL. Using the highest semen level measured and assuming 100% absorption would be up to 105 ng per day, which is 50-to 100-fold less than the dose of finasteride (5 mcg) that had no effect on circulating DHT levels in men [see Clinical Pharmacology (12.3)]. Animal DataIn an embryo-fetal development study, pregnant rats received finasteride during the period of major organogenesis (gestation days to 17). At maternal doses of oral finasteride approximately 0.1 to 86 times the maximum recommended human dose (MRHD) of mg/day (based on AUC at animal doses of 0.1 to 100 mg/kg/day) there was dose-dependent increase in hypospadias that occurred in 3.6 to 100% of male offspring. Exposure multiples were estimated using data from nonpregnant rats. Days 16 to 17 of gestation is critical period in male fetal rats for differentiation of the external genitalia. At oral maternal doses approximately 0.03 times the MRHD (based on AUC at animal dose of 0.03 mg/kg/day), male offspring had decreased prostatic and seminal vesicular weights, delayed preputial separation and transient nipple development. Decreased anogenital distance occurred in male offspring of pregnant rats that received approximately 0.003 times the MRHD (based on AUC at animal dose of 0.003 mg/kg/day). No abnormalities were observed in female offspring at any maternal dose of finasteride. No developmental abnormalities were observed in the offspring of untreated females mated with finasteride treated male rats that received approximately 61 times the MRHD (based on AUC at animal dose of 80 mg/kg/day). Slightly decreased fertility was observed in male offspring after administration of about times the MRHD (based on AUC at animal dose of mg/kg/day) to female rats during late gestation and lactation. No effects on fertility were seen in female offspring under these conditions. No evidence of male external genital malformations or other abnormalities were observed in rabbit fetuses exposed to finasteride during the period of major organogenesis (gestation days to 18) at maternal oral doses up to 100 mg/kg /day, (finasteride exposure levels were not measured in rabbits). However, this study may not have included the critical period for finasteride effects on development of male external genitalia in the rabbit. The fetal effects of maternal finasteride exposure during the period of embryonic and fetal development were evaluated in the rhesus monkey (gestation days 20 to 100), in species and development period more predictive of specific effects in humans than the studies in rats and rabbits. Intravenous administration of finasteride to pregnant monkeys at doses as high as 800 ng/day (estimated maximal blood concentration of 1.86 ng/mL or about 143 times the highest estimated exposure of pregnant females to finasteride from semen of men taking mg/day) resulted in no abnormalities in male fetuses. In confirmation of the relevance of the rhesus model for human fetal development, oral administration of dose of finasteride (2 mg/kg/day or approximately 18,000 times the highest estimated blood levels of finasteride from semen of men taking mg/day) to pregnant monkeys resulted in external genital abnormalities in male fetuses. No other abnormalities were observed in male fetuses and no finasteride-related abnormalities were observed in female fetuses at any dose.

SPL UNCLASSIFIED SECTION.

1.1 Monotherapy. Finasteride tablets mg are indicated for the treatment of symptomatic benign prostatic hyperplasia (BPH) in men with an enlarged prostate to:- Improve symptoms Reduce the risk of acute urinary retention- Reduce the risk of the need for surgery including transurethral resection of the prostate (TURP) and prostatectomy.

USE IN SPECIFIC POPULATIONS SECTION.

8 USE IN SPECIFIC POPULATIONS. 8.1 Pregnancy. Risk SummaryFinasteride tablets mg is contraindicated in pregnant females and not indicated for use in females. Based on animal studies and the mechanism of action, finasteride tablets mg may cause abnormal development of external genitalia in male fetus if administered to pregnant female [see Warnings and Precautions (5.3) and Clinical Pharmacology (12.1)]. In an embryo-fetal development study in rats, there was dose-dependent increase in hypospadias that occurred in 3.6 to 100% of male offspring of pregnant rats administered oral finasteride during the period of major organogenesis at doses approximately 0.1 to 86 times the maximum recommended human dose (MRHD) of mg/day (based on AUC at animal doses of 0.1 to 100 mg/kg/day). Decreased prostatic and seminal vesicular weights, delayed preputial separation and transient nipple development were also observed in male offspring at oral maternal doses approximately 0.03 times the MRHD (based on AUC at animal dose of 0.03 mg/kg/day), along with decreased anogenital distance in male offspring at oral maternal doses approximately 0.003 times the MRHD (based on AUC at animal dose of 0.003 mg/kg/day). Finasteride tablets mg are Type II 5-reductase inhibitors that prevent conversion of testosterone to 5-dihydrotestosterone (DHT), hormone necessary for normal development of male genitalia. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential hazard to the male fetus.Abnormal male genital development is an expected consequence when conversion of testosterone to 5-dihydrotestosterone (DHT) is inhibited by 5-reductase inhibitors. These outcomes are similar to those reported in male infants with genetic 5-reductase deficiency. Females could be exposed to finasteride through contact with crushed or broken finasteride tablets mg or semen from male partner taking finasteride tablets mg. With regard to finasteride exposure through the skin, finasteride tablets mg are coated and will prevent skin contact with finasteride during normal handling if the tablets have not been crushed or broken. Females who are pregnant or may potentially be pregnant should not handle crushed or broken finasteride tablets mg because of possible exposure of male fetus. With regard to potential finasteride exposure through semen, three studies have been conducted that measured finasteride concentrations in semen in men receiving finasteride tablets mg/day. In these studies the highest amount of finasteride in semen was estimated to be 50-to 100-fold less than the dose of finasteride (5 mcg) that had no effect on circulating DHT levels in men [see Data and Clinical Pharmacology (12.3)]. Data Human DataIn studies of healthy subjects (n=69) receiving finasteride tablets mg/day for 6-24 weeks, finasteride concentrations in semen ranged from undetectable (<0.1 ng/mL) to 10.54 ng/mL. In an earlier study using less sensitive assay, finasteride concentrations in semen of 16 subjects receiving finasteride tablets mg/day ranged from undetectable (<1.0 ng/mL) to 21 ng/mL. Using the highest semen level measured and assuming 100% absorption would be up to 105 ng per day, which is 50-to 100-fold less than the dose of finasteride (5 mcg) that had no effect on circulating DHT levels in men [see Clinical Pharmacology (12.3)]. Animal DataIn an embryo-fetal development study, pregnant rats received finasteride during the period of major organogenesis (gestation days to 17). At maternal doses of oral finasteride approximately 0.1 to 86 times the maximum recommended human dose (MRHD) of mg/day (based on AUC at animal doses of 0.1 to 100 mg/kg/day) there was dose-dependent increase in hypospadias that occurred in 3.6 to 100% of male offspring. Exposure multiples were estimated using data from nonpregnant rats. Days 16 to 17 of gestation is critical period in male fetal rats for differentiation of the external genitalia. At oral maternal doses approximately 0.03 times the MRHD (based on AUC at animal dose of 0.03 mg/kg/day), male offspring had decreased prostatic and seminal vesicular weights, delayed preputial separation and transient nipple development. Decreased anogenital distance occurred in male offspring of pregnant rats that received approximately 0.003 times the MRHD (based on AUC at animal dose of 0.003 mg/kg/day). No abnormalities were observed in female offspring at any maternal dose of finasteride. No developmental abnormalities were observed in the offspring of untreated females mated with finasteride treated male rats that received approximately 61 times the MRHD (based on AUC at animal dose of 80 mg/kg/day). Slightly decreased fertility was observed in male offspring after administration of about times the MRHD (based on AUC at animal dose of mg/kg/day) to female rats during late gestation and lactation. No effects on fertility were seen in female offspring under these conditions. No evidence of male external genital malformations or other abnormalities were observed in rabbit fetuses exposed to finasteride during the period of major organogenesis (gestation days to 18) at maternal oral doses up to 100 mg/kg /day, (finasteride exposure levels were not measured in rabbits). However, this study may not have included the critical period for finasteride effects on development of male external genitalia in the rabbit. The fetal effects of maternal finasteride exposure during the period of embryonic and fetal development were evaluated in the rhesus monkey (gestation days 20 to 100), in species and development period more predictive of specific effects in humans than the studies in rats and rabbits. Intravenous administration of finasteride to pregnant monkeys at doses as high as 800 ng/day (estimated maximal blood concentration of 1.86 ng/mL or about 143 times the highest estimated exposure of pregnant females to finasteride from semen of men taking mg/day) resulted in no abnormalities in male fetuses. In confirmation of the relevance of the rhesus model for human fetal development, oral administration of dose of finasteride (2 mg/kg/day or approximately 18,000 times the highest estimated blood levels of finasteride from semen of men taking mg/day) to pregnant monkeys resulted in external genital abnormalities in male fetuses. No other abnormalities were observed in male fetuses and no finasteride-related abnormalities were observed in female fetuses at any dose.. 8.2 Lactation. Risk Summary Finasteride tablets mg are not indicated for use in females. 8.3 Females and Males of Reproductive Potential. InfertilityFemalesFinasteride tablets mg is not indicated for use in females.Males Treatment with finasteride tablets mg for 24 weeks to evaluate semen parameters in healthy male volunteers revealed no clinically meaningful effects on sperm concentration, mobility, morphology, or pH. 0.6 mL (22.1%) median decrease in ejaculate volume with concomitant reduction in total sperm per ejaculate was observed. These parameters remained within the normal range and were reversible upon discontinuation of therapy with an average time to return to baseline of 84 weeks [see Warnings and Precautions (5.5)]. There have been postmarketing reports of male infertility and/or poor seminal quality; normalization or improvement of seminal quality has been reported after discontinuation of finasteride [see Adverse Reactions (6.2)]. 8.4 Pediatric Use. Finasteride tablets mg are not indicated for use in pediatric patients. Safety and effectiveness in pediatric patients have not been established.. 8.5 Geriatric Use. Of the total number of subjects included in the long-term efficacy and safety study, 1,480 and 105 subjects were 65 and over and 75 and over, respectively. No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in responses between the elderly and younger patients. No dosage adjustment is necessary in the elderly [see Clinical Pharmacology (12.3) and Clinical Studies (14)].. 8.6 Hepatic Impairment. Caution should be exercised in the administration of finasteride tablets mg in those patients with liver function abnormalities, as finasteride is metabolized extensively in the liver [see Clinical Pharmacology (12.3)]. 8.7 Renal Impairment. No dosage adjustment is necessary in patients with renal impairment [see Clinical Pharmacology (12.3)].