ADVERSE REACTIONS SECTION.

6 ADVERSE REACTIONS. The following serious adverse reactions are discussed in more detail below and elsewhere in the labeling:Hypoglycemia [see Warnings and Precautions 5.1) Hemolytic anemia [see Warnings and Precautions 5.3) In clinical trials, the most common adverse reactions with glimepiride were hypoglycemia, dizziness, asthenia, headache, and nausea.. Hypoglycemia [see Warnings and Precautions 5.1) . Hemolytic anemia [see Warnings and Precautions 5.3) . Common adverse reactions in clinical trials (>=5% and more common than with placebo) include hypoglycemia, headache, nausea, and dizziness 6.1). To report SUSPECTED ADVERSE REACTIONS, contact Carlsbad Technology, Inc. at (760) 431-8284 or contact 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 practice.Approximately 2,800 patients with type diabetes have been treated with glimepiride in the controlled clinical trials. In these trials, approximately 1,700 patients were treated with glimepiride for at least year.Table summarizes adverse events, other than hypoglycemia, that were reported in 11 pooled placebo-controlled trials, whether or not considered to be possibly or probably related to study medication. Treatment duration ranged from 13 weeks to 12 months. Terms that are reported represent those that occurred at an incidence of >=5% among glimepiride -treated patients and more commonly than in patients who received placebo. Table 1. Eleven Pooled Placebo-Controlled Trials ranging from 13 weeks to 12 months: Adverse Events (Excluding Hypoglycemia) Occurring in >=5% of glimepiride -treated Patients and at Greater Incidence than with Placebo Glimepiride doses ranged from 1-16 mg administered daily +Insufficient information to determine whether any of the accidental injury events were associated with hypoglycemia Glimepiride N=745 Placebo N=294 Headache 8.2 7.8 Accidental Injury 5.8 3.4 Flu Syndrome 5.4 4.4 Nausea 5.0 3.4 Dizziness 5.0 2.4. Hypoglycemia:In randomized, double-blind, placebo-controlled monotherapy trial of 14 weeks duration, patients already on sulfonylurea therapy underwent 3-week washout period then were randomized to glimepiride mg, mg, mg or placebo. Patients randomized to glimepiride mg or mg underwent forced-titration from an initial dose of mg to these final doses, as tolerated [see Clinical Studies 14.1)]. The overall incidence of possible hypoglycemia (defined by the presence of at least one symptom that the investigator believed might be related to hypoglycemia; concurrent glucose measurement was not required) was 4% for glimepiride mg, 17% for glimepiride mg, 16% for glimepiride mg and 0% for placebo. All of these events were self-treated. In randomized, double-blind, placebo-controlled monotherapy trial of 22 weeks duration, patients received starting dose of either mg glimepiride or placebo daily. The dose of glimepiride was titrated to target fasting plasma glucose of 90-150 mg/dL. Final daily doses of glimepiride were 1, 2, 3, 4, or mg [see Clinical Studies 14.1)] The overall incidence of possible hypoglycemia (as defined above for the 14-week trial) for glimepiride vs. placebo was 19.7% vs. 3.2%. All of these events were self-treated. . Weight gain: Glimepiride, like all sulfonylureas, can cause weight gain [see Clinical Studies 14.1) ]. . Allergic Reactions: In clinical trials, allergic reactions, such as pruritus, erythema, urticaria, and morbilliform or maculopapular eruptions, occurred in less than 1% of glimepiride -treated patients. These may resolve despite continued treatment with glimepiride. There are postmarketing reports of more serious allergic reactions (e.g., dyspnea, hypotension, shock) [see Warnings and Precautions 5.2) ]. . Laboratory Tests: Elevated Serum Alanine Aminotransferase (ALT): In 11 pooled placebo-controlled trials of glimepiride, 1.9% of glimepiride -treated patients and 0.8% of placebo-treated patients developed serum ALT greater than times the upper limit of the reference range. 6.2 Postmarketing Experience. The following adverse reactions have been identified during post-approval use of glimepiride. Because these reactions 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.Serious hypersensitivity reactions, including anaphylaxis, angioedema, and Stevens-Johnson Syndrome [see Warnings and Precautions 5.2) Hemolytic anemia in patients with and without G6PD deficiency [see Warnings and Precautions 5.3) Impairment of liver function (e.g. with cholestasis and jaundice), as well as hepatitis, which may progress to liver failure.Porphyria cutanea tarda, photosensitivity reactions and allergic vasculitisLeukopenia, agranulocytosis, aplastic anemia, and pancytopeniaThrombocytopenia (including severe cases with platelet count less than 10,000/uL) and thrombocytopenic purpuraHepatic porphyria reactions and disulfiram-like reactionsHyponatremia and syndrome of inappropriate antidiuretic hormone secretion (SIADH), most often in patients who are on other medications or who have medical conditions known to cause hyponatremia or increase release of antidiuretic hormone. Serious hypersensitivity reactions, including anaphylaxis, angioedema, and Stevens-Johnson Syndrome [see Warnings and Precautions 5.2) . Hemolytic anemia in patients with and without G6PD deficiency [see Warnings and Precautions 5.3) . Impairment of liver function (e.g. with cholestasis and jaundice), as well as hepatitis, which may progress to liver failure.. Porphyria cutanea tarda, photosensitivity reactions and allergic vasculitis. Leukopenia, agranulocytosis, aplastic anemia, and pancytopenia. Thrombocytopenia (including severe cases with platelet count less than 10,000/uL) and thrombocytopenic purpura. Hepatic porphyria reactions and disulfiram-like reactions. Hyponatremia and syndrome of inappropriate antidiuretic hormone secretion (SIADH), most often in patients who are on other medications or who have medical conditions known to cause hyponatremia or increase release of antidiuretic hormone.

CLINICAL PHARMACOLOGY SECTION.

12 CLINICAL PHARMACOLOGY. 12.1 Mechanism of Action. Glimepiride primarily lowers blood glucose by stimulating the release of insulin from pancreatic beta cells. Sulfonylureas bind to the sulfonylurea receptor in the pancreatic beta-cell plasma membrane, leading to closure of the ATP-sensitive potassium channel, thereby stimulating the release of insulin.. 12.2 Pharmacodynamics. In healthy subjects, the time to reach maximal effect (minimum blood glucose concentrations) was approximately 2-3 hours after single oral doses of glimepiride. The effects of glimepiride on HbA 1c, fasting plasma glucose, and post-prandial glucose have been assessed in clinical trials see Clinical Studies 14) ]. 12.3 Pharmacokinetics. Absorption: Studies with single oral doses of glimepiride in healthy subjects and with multiple oral doses in patients with type diabetes showed peak drug concentrations (C max) to hours post-dose. When glimepiride was given with meals, the mean max and AUC (area under the curve) were decreased by 8% and 9%, respectively. Glimepiride does not accumulate in serum following multiple dosing. The pharmacokinetics of glimepiride does not differ between healthy subjects and patients with type diabetes. Clearance of glimepiride after oral administration does not change over the mg to mg dose range, indicating linear pharmacokinetics.In healthy subjects, the intra- and inter-individual variabilities of glimepiride pharmacokinetic parameters were 15-23% and 24-29%, respectively.. Distribution: After intravenous dosing in healthy subjects, the volume of distribution (Vd) was 8.8 (113 mL/kg), and the total body clearance (CL) was 47.8 mL/min. Protein binding was greater than 99.5%. . Metabolism: Glimepiride is completely metabolized by oxidative biotransformation after either an intravenous or oral dose. The major metabolites are the cyclohexyl hydroxy methyl derivative (M1) and the carboxyl derivative (M2). Cytochrome P450 2C9 is involved in the biotransformation of glimepiride to M1. M1 is further metabolized to M2 by one or several cytosolic enzymes. M2 is inactive. In animals, M1 possesses about one-third of the pharmacological activity of glimepiride, but it is unclear whether M1 results in clinically meaningful effects on blood glucose in humans. . Excretion: When 14C-glimepiride was given orally to healthy male subjects, approximately 60% of the total radioactivity was recovered in the urine in days. M1 and M2 accounted for 80-90% of the radioactivity recovered in the urine. The ratio of M1 to M2 in the urine was approximately 3:2 in two subjects and 4:1 in one subject. Approximately 40% of the total radioactivity was recovered in feces. M1 and M2 accounted for approximately 70% (ratio of M1 to M2 was 1:3) of the radioactivity recovered in feces. No parent drug was recovered from urine or feces. After intravenous dosing in patients, no significant biliary excretion of glimepiride or its M1 metabolite was observed. . Geriatric Patients: comparison of glimepiride pharmacokinetics in patients with type diabetes <=65 years and those >65 years was evaluated in multiple-dose study using glimepiride mg daily. There were no significant differences in glimepiride pharmacokinetics between the two age groups. The mean AUC at steady state for the older patients was approximately 13% lower than that for the younger patients; the mean weight-adjusted clearance for the older patients was approximately 11% higher than that for the younger patients. . Gender: There were no differences between males and females in the pharmacokinetics of glimepiride when adjustment was made for differences in body weight. . Race: No studies have been conducted to assess the effects of race on glimepiride pharmacokinetics but in placebo-controlled trials of glimepiride in patients with type diabetes, the reduction in HbA 1C was comparable in Caucasians (n 536), blacks (n 63), and Hispanics (n 63). . Renal Impairment: In single-dose, open-label study glimepiride mg was administered to patients with mild, moderate and severe renal impairment as estimated by creatinine clearance (CLcr): Group consisted of patients with mild renal impairment (CLcr 50 mL/min), Group II consisted of patients with moderate renal impairment (CLcr 20-50 mL/min) and Group III consisted of patients with severe renal impairment (CLcr 20 mL/min). Although, glimepiride serum concentrations decreased with decreasing renal function, Group III had 2.3-fold higher mean AUC for M1 and an 8.6-fold higher mean AUC for M2 compared to corresponding mean AUCs in Group I. The apparent terminal half-life (T 1/2) for glimepiride did not change, while the half-lives for M1 and M2 increased as renal function decreased. Mean urinary excretion of M1 plus M2 as percentage of dose decreased from 44.4% for Group to 21.9% for Group II and 9.3% for Group III. . Hepatic Impairment: It is unknown whether there is an effect of hepatic impairment on glimepiride pharmacokinetics because the pharmacokinetics of glimepiride has not been adequately evaluated in patients with hepatic impairment. . Obese Patients: The pharmacokinetics of glimepiride and its metabolites were measured in single-dose study involving 28 patients with type diabetes who either had normal body weight or were morbidly obese. While the max, clearance, and volume of distribution of glimepiride in the morbidly obese patients were similar to those in the normal weight group, the morbidly obese had lower max and AUC than those of normal body weight. The mean max, AUC 0-24, AUC 0- values of glimepiride in normal vs. morbidly obese patients were 547 +- 218 ng/mL vs. 410 +- 124 ng/mL, 3210 +- 1030 hours.ng/mL vs. 2820 +- 1110 hours.ng/mL and 4000 +- 1320 hours.ng/mL vs. 3280 +- 1360 hours.ng/mL, respectively. . Drug Interactions: . Aspirin: In randomized, double-blind, two-period, crossover study, healthy subjects were given either placebo or aspirin gram three times daily for total treatment period of days. On Day of each study period, single mg dose of glimepiride was administered. The glimepiride doses were separated by 14-day washout period. Co-administration of aspirin and glimepiride resulted in 34% decrease in the mean glimepiride AUC and 4% decrease in the mean glimepiride max. . Colesevelam: Concomitant administration of colesevelam and glimepiride resulted in reductions in glimepiride AUC 0- and max of 18% and 8%, respectively. When glimepiride was administered hours prior to colesevelam, there was no significant change in glimepiride AUC 0- or Cmax, -6% and 3%, respectively [see Dosage and Administration 2.1) and Drug Interactions 7.4)]. . Cimetidine and Ranitidine: In randomized, open-label, 3-way crossover study, healthy subjects received either single mg dose of glimepiride alone, glimepiride with ranitidine (150 mg twice daily for days; glimepiride was administered on Day 3), or glimepiride with cimetidine (800 mg daily for days; glimepiride was administered on Day 3). Coadministration of cimetidine or ranitidine with single mg oral dose of glimepiride did not significantly alter the absorption and disposition of glimepiride. . Propranolol: In randomized, double-blind, two-period, crossover study, healthy subjects were given either placebo or propranolol 40 mg three times daily for total treatment period of days. On Day or each study period, single mg dose of glimepiride was administered. The glimepiride doses were separated by 14-day washout period. Concomitant administration of propranolol and glimepiride significantly increased glimepiride max, AUC, and 1/2 by 23%, 22%, and 15%, respectively, and decreased glimepiride CL/f by 18%. The recovery of M1 and M2 from urine was not changed. . Warfarin: In an open-label, two-way, crossover study, healthy subjects received mg of glimepiride tablets daily for 10 days. Single 25 mg doses of warfarin were administered days before starting glimepiride and on Day of glimepiride administration. The concomitant administration of glimepiride did not alter the pharmacokinetics of R- and S-warfarin enantiomers. No changes were observed in warfarin plasma protein binding. Glimepiride resulted in statistically significant decrease in the pharmacodynamic response to warfarin. The reductions in mean area under the prothrombin time (PT) curve and maximum PT values during glimepiride treatment were 3.3% and 9.9%, respectively, and are unlikely to be clinically relevant.

CLINICAL STUDIES SECTION.

14 CLINICAL STUDIES. 14.1 Monotherapy. total of 304 patients with type diabetes already treated with sulfonylurea therapy participated in 14-week, multicenter, randomized, double-blind, placebo-controlled trial evaluating the safety and efficacy of glimepiride monotherapy. Patients discontinued their sulfonylurea therapy then entered 3-week placebo washout period followed by randomization into of treatment groups: placebo (n=74), glimepiride mg (n=78), glimepiride mg (n=76) and glimepiride mg (n=76). All patients randomized toglimepiride started mg daily. Patients randomized to glimepiride mg or mg hadblinded, forced titration of the glimepiride dose at weekly intervals, first to mg and then to8 mg, as long as the dose was tolerated, until the randomized dose was reached. Patients randomized to the mg dose reached the assigned dose at Week 2. Patients randomized tothe mg dose reached the assigned dose at Week 3. Once the randomized dose level was reached, patients were to be maintained at that dose until Week 14. Approximately 66% ofthe placebo-treated patients completed the trial compared to 81% of patients treated with glimepiride mg and 92% of patients treated with glimepiride mg or mg. Compared to placebo, treatment with glimepiride mg, mg and mg daily provided statistically significant improvements in HbA 1C compared to placebo Table 3). Table 3. 14-week Monotherapy Trial Comparing Glimepiride to Placebo in Patients Previously Treated With Sulfonylurea Therapy a Intent-to-treat population using last observation on study Least squares mean adjusted for baseline value p<=0.001 Placebo (N=74) Glimepiride mg (N=78) mg (N=76) mg (N=76) HbA 1C (%) n=59 n=65 n=65 n=68 Baseline (mean) 8.0 7.9 7.9 8.0 Change from Baseline (adjusted mean b) 1.5 0.3 -0.3 -0.4 Difference from Placebo (adjusted mean b) 95% confidence interval -1.2 (-1.5, -0.8) -1.8 (-2.1, -1.4) -1.8 (-2.2, -1.5) Mean Baseline Weight (kg) n=67 n=76 n=75 n=73 Baseline (mean) 85.7 84.3 86.1 85.5 Change from Baseline (adjusted mean b) -2.3 -0.2 0.5 1.0 Difference from Placebo (adjusted mean b) 95% confidence interval 2.0 (1.4, 2.7) 2.8 (2.1, 3.5) 3.2 (2.5, 4.0)A total of 249 patients who were treatment-naive or who had received limited treatment with antidiabetic therapy in the past were randomized to receive 22 weeks of treatment with either glimepiride (n=123) or placebo (n=126) in multicenter, randomized, double-blind, placebo-controlled, dose-titration trial. The starting dose of glimepiride was mg daily and was titrated upward or downward at 2-week intervals to goal FPG of 90-150 mg/dL. Blood glucose levels for both FPG and PPG were analyzed in the laboratory. Following 10 weeks of dose adjustment, patients were maintained at their optimal dose (1, 2, 3, 4, or mg) for the remaining 12 weeks of the trial. Treatment with glimepiride provided statistically significant improvements in HbA 1C and FPG compared to placebo Table 4). Table 4. 22-Week Monotherapy Trial Comparing Glimepiride to Placebo in Patients Who Were Treatment-Naive or Who Had No Recent Treatment with Antidiabetic Therapy aIntent to treat population using last observation on study bLeast squares mean adjusted for baseline value p<=0.0001 Placebo (N=126) Glimepiride (N=123) HbA 1C (%) n=97 n=106 Baseline (mean) 9.1 9.3 Change from Baseline (adjusted mean b) -1.1 -2.2 Difference from Placebo (adjusted mean b) 95% confidence interval -1.1 (-1.5, -0.8) Body Weight (kg) n=122 n=119 Baseline (mean) 86.5 87.1 Change from Baseline (adjusted mean b) -0.9 1.8 Difference from Placebo (adjusted mean b) 95% confidence interval 2.7 (1.9, 3.6).

DOSAGE & ADMINISTRATION SECTION.

2 DOSAGE AND ADMINISTRATION. Recommended starting dose is or mg once daily. Increase in or mg increments no more frequently than every 1-2 weeks based on glycemic response. Maximum recommended dose is mg once daily 2.1). Administer with breakfast or first meal of the day 2.1). Use mg starting dose and titrate slowly in patients at increased risk for hypoglycemia (e.g., elderly, patients with renal impairment) 2.1). Recommended starting dose is or mg once daily. Increase in or mg increments no more frequently than every 1-2 weeks based on glycemic response. Maximum recommended dose is mg once daily 2.1). Administer with breakfast or first meal of the day 2.1). Use mg starting dose and titrate slowly in patients at increased risk for hypoglycemia (e.g., elderly, patients with renal impairment) 2.1). 2.1 Recommended Dosing. Glimepiride should be administered with breakfast or the first main meal of the day.The recommended starting dose of glimepiride is mg or mg once daily. Patients at increased risk for hypoglycemia (e.g., the elderly or patients with renal impairment) should be started on mg once daily [see Warnings and Precautions 5.1) and Use in Specific Populations 8.5, 8.6) ]. After reaching daily dose of mg, further dose increases can be made in increments of mg or mg based upon the patients glycemic response. Uptitration should not occur more frequently than every 1-2 weeks. conservative titration scheme is recommended for patients at increased risk for hypoglycemia [see Warnings and Precautions 5.1) and Use in Specific Populations 8.5, 8.6) ]. The maximum recommended dose is mg once daily.Patients being transferred to glimepiride from longer half-life sulfonylureas (e.g., chlorpropamide) may have overlapping drug effect for 1-2 weeks and should be appropriately monitored for hypoglycemia.When colesevelam is coadministered with glimepiride, maximum plasma concentration and total exposure to glimepiride is reduced. Therefore, glimepiride should be administered at least hours prior to colesevelam.

DRUG INTERACTIONS SECTION.

7 DRUG INTERACTIONS. Certain medications may affect glucose metabolism, requiring glimepiride dose adjustment and close monitoring of blood glucose 7.1). Miconazole: Severe hypoglycemia can occur when glimepiride and oral miconazole are used concomitantly. 7.2). Cytochrome P450 2C9 interactions: Inhibitors and inducers of cytochrome P450 2C9 may affect glycemic control by altering glimepiride plasma concentrations 7.3). Colesevelam: Coadministration may reduce glimepiride absorption. Glimepiride should be administered at least hours prior to colesevelam 2.1, 7.4). Certain medications may affect glucose metabolism, requiring glimepiride dose adjustment and close monitoring of blood glucose 7.1). Miconazole: Severe hypoglycemia can occur when glimepiride and oral miconazole are used concomitantly. 7.2). Cytochrome P450 2C9 interactions: Inhibitors and inducers of cytochrome P450 2C9 may affect glycemic control by altering glimepiride plasma concentrations 7.3). Colesevelam: Coadministration may reduce glimepiride absorption. Glimepiride should be administered at least hours prior to colesevelam 2.1, 7.4). 7.1 Drugs Affecting Glucose Metabolism. number of medications affect glucose metabolism and may require glimepiride dose adjustment and particularly close monitoring for hypoglycemia or worsening glycemic control.The following are examples of medications that may increase the glucose-lowering effect of sulfonylureas including glimepiride, increasing the susceptibility to and/or intensity of hypoglycemia: oral anti-diabetic medications, pramlintide acetate, insulin, angiotensin converting enzyme (ACE) inhibitors, H2 receptor antagonists, fibrates, propoxyphene, pentoxifylline, somatostatin analogs, anabolic steroids and androgens, cyclophosphamide, phenyramidol, guanethidine, fluconazole, sulfinpyrazone, tetracyclines, clarithromycin, disopyramide, quinolones, and those drugs that are highly protein-bound, such as fluoxetine, nonsteroidal anti-inflammatory drugs, salicylates, sulfonamides, chloramphenicol, coumarins, probenecid and monoamine oxidase inhibitors. When these medications are administered to patient receiving glimepiride, monitor the patient closely for hypoglycemia. When these medications are withdrawn from patient receiving glimepiride, monitor the patient closely for worsening glycemic control.The following are examples of medications that may reduce the glucose-lowering effect of sulfonylureas including glimepiride, leading to worsening glycemic control: danazol, glucagon, somatropin, protease inhibitors, atypical antipsychotic medications (e.g., olanzapine and clozapine), barbiturates, diazoxide, laxatives, rifampin, thiazides and other diuretics, corticosteroids, phenothiazines, thyroid hormones, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics (e.g., epinephrine, albuterol, terbutaline), and isoniazid. When these medications are administered to patient receiving glimepiride, monitor the patient closely for worsening glycemic control. When these medications are withdrawn from patient receiving glimepiride, monitor the patient closely for hypoglycemia.Beta-blockers, clonidine, and reserpine may lead to either potentiation or weakening of glimepirides glucose-lowering effect.Both acute and chronic alcohol intake may potentiate or weaken the glucose-lowering action of glimepiride in an unpredictable fashion.The signs of hypoglycemia may be reduced or absent in patients taking sympatholytic drugs such as beta-blockers, clonidine, guanethidine, and reserpine.. 7.2 Miconazole. potential interaction between oral miconazole and sulfonylureas leading to severe hypoglycemia has been reported. Whether this interaction also occurs with other dosage forms of miconazole is not known.. 7.3 Cytochrome P450 2C9 Interactions. There may be an interaction between glimepiride and inhibitors (e.g., fluconazole) and inducers (e.g., rifampin) of cytochrome P450 2C9. Fluconazole may inhibit the metabolism of glimepiride, causing increased plasma concentrations of glimepiride which may lead to hypoglycemia. Rifampin may induce the metabolism of glimepiride, causing decreased plasma concentrations of glimepiride which may lead to worsening glycemic control.. 7.4 Concomitant Administration of Colesevelam. Colesevelam can reduce the maximum plasma concentration and total exposure of glimepiride when the two are coadministered. However, absorption is not reduced when glimepiride is administered hours prior to colesevelam. Therefore, glimepiride should be administered at least hours prior to colesevelam.

PEDIATRIC USE SECTION.

8.4 Pediatric Use. The pharmacokinetics, efficacy and safety of glimepiride have been evaluated in pediatric patients with type diabetes as described below. Glimepiride is not recommended in pediatric patients because of its adverse effects on body weight and hypoglycemia.The pharmacokinetics of 1 mg single dose of glimepiride was evaluated in 30 patients with type diabetes (male 7; female 23) between ages 10 and 17 years. The mean (+- SD) AUC (0-last) (339+-203 ngohr/mL), Cmax (102+-48 ng/mL) and t1/2 (3.1+-1.7 hours) for glimepiride were comparable to historical data from adults (AUC 0-last) 315+-96 ngohr/mL, Cmax 103+-34 ng/mL and t1/2 5.3+-4.1 hours). The safety and efficacy of glimepiride in pediatric patients was evaluated in single-blind, 24-week trial that randomized 272 patients (8-17 years of age) with type diabetes to glimepiride (n=135) or metformin (n=137). Both treatment-naive patients (those treated with only diet and exercise for at least weeks prior to randomization) and previously treated patients (those previously treated or currently treated with other oral antidiabetic medications for at least months) were eligible to participate. Patients who were receiving oral antidiabetic agents at the time of study entry discontinued these medications before randomization without washout period. Glimepiride was initiated at mg, and then titrated up to 2, or mg (mean last dose mg) through Week 12, targeting self-monitored fasting fingerstick blood glucose 126 mg/dL. Metformin was initiated at 500 mg twice daily and titrated at Week 12 up to 1000 mg twice daily (mean last dose 1365 mg).After 24 weeks, the overall mean treatment difference in HbA 1c between glimepiride and metformin was 0.2%, favoring metformin (95% confidence interval -0.3% to +0.6%). Based on these results, the trial did not meet its primary objective of showing similar reduction in HbA 1c with glimepiride compared to metformin. Table 2. Change from Baseline in HbA 1C and Body Weight in Pediatric Patients Taking Glimepiride or Metformin Intent-to-treat population using last-observation-carried-forward for missing data (Glimepiride, n=127; metformin, n=126) adjusted for baseline HbA 1C and Tanner Stage Difference is Glimepiride metformin with positive differences favoring metformin Metformin Glimepiride Treatment-Naive Patients N=69 N=72 HbA 1C (%) Baseline (mean) 8.2 8.3 Change from baseline (adjusted LS mean) -1.2 -1.0 Adjusted Treatment Difference (95%CI) 0.2 (-0.3; 0.6) Previously Treated Patients N=57 N=55 HbA 1C (%) Baseline (mean) 9.0 8.7 Change from baseline (adjusted LS mean) -0.2 0.2 Adjusted Treatment Difference (95%CI) 0.4 (-0.4; 1.2) Body Weight (kg) N=126 N=129 Baseline (mean) 67.3 66.5 Change from baseline (adjusted LS mean)+ 0.7 2.0 Adjusted Treatment Difference (95% CI) 1.3 (0.3; 2.3)The profile of adverse reactions in pediatric patients treated with glimepiride was similar to that observed in adults [see Adverse Reactions 6)]. Hypoglycemic events documented by blood glucose values <36 mg/dL were observed in 4% of pediatric patients treated with glimepiride and in 1% of pediatric patients treated with metformin. One patient in each treatment group experienced severe hypoglycemic episode (severity was determined by the investigator based on observed signs and symptoms).

PHARMACOKINETICS SECTION.

12.3 Pharmacokinetics. Absorption: Studies with single oral doses of glimepiride in healthy subjects and with multiple oral doses in patients with type diabetes showed peak drug concentrations (C max) to hours post-dose. When glimepiride was given with meals, the mean max and AUC (area under the curve) were decreased by 8% and 9%, respectively. Glimepiride does not accumulate in serum following multiple dosing. The pharmacokinetics of glimepiride does not differ between healthy subjects and patients with type diabetes. Clearance of glimepiride after oral administration does not change over the mg to mg dose range, indicating linear pharmacokinetics.In healthy subjects, the intra- and inter-individual variabilities of glimepiride pharmacokinetic parameters were 15-23% and 24-29%, respectively.. Distribution: After intravenous dosing in healthy subjects, the volume of distribution (Vd) was 8.8 (113 mL/kg), and the total body clearance (CL) was 47.8 mL/min. Protein binding was greater than 99.5%. . Metabolism: Glimepiride is completely metabolized by oxidative biotransformation after either an intravenous or oral dose. The major metabolites are the cyclohexyl hydroxy methyl derivative (M1) and the carboxyl derivative (M2). Cytochrome P450 2C9 is involved in the biotransformation of glimepiride to M1. M1 is further metabolized to M2 by one or several cytosolic enzymes. M2 is inactive. In animals, M1 possesses about one-third of the pharmacological activity of glimepiride, but it is unclear whether M1 results in clinically meaningful effects on blood glucose in humans. . Excretion: When 14C-glimepiride was given orally to healthy male subjects, approximately 60% of the total radioactivity was recovered in the urine in days. M1 and M2 accounted for 80-90% of the radioactivity recovered in the urine. The ratio of M1 to M2 in the urine was approximately 3:2 in two subjects and 4:1 in one subject. Approximately 40% of the total radioactivity was recovered in feces. M1 and M2 accounted for approximately 70% (ratio of M1 to M2 was 1:3) of the radioactivity recovered in feces. No parent drug was recovered from urine or feces. After intravenous dosing in patients, no significant biliary excretion of glimepiride or its M1 metabolite was observed. . Geriatric Patients: comparison of glimepiride pharmacokinetics in patients with type diabetes <=65 years and those >65 years was evaluated in multiple-dose study using glimepiride mg daily. There were no significant differences in glimepiride pharmacokinetics between the two age groups. The mean AUC at steady state for the older patients was approximately 13% lower than that for the younger patients; the mean weight-adjusted clearance for the older patients was approximately 11% higher than that for the younger patients. . Gender: There were no differences between males and females in the pharmacokinetics of glimepiride when adjustment was made for differences in body weight. . Race: No studies have been conducted to assess the effects of race on glimepiride pharmacokinetics but in placebo-controlled trials of glimepiride in patients with type diabetes, the reduction in HbA 1C was comparable in Caucasians (n 536), blacks (n 63), and Hispanics (n 63). . Renal Impairment: In single-dose, open-label study glimepiride mg was administered to patients with mild, moderate and severe renal impairment as estimated by creatinine clearance (CLcr): Group consisted of patients with mild renal impairment (CLcr 50 mL/min), Group II consisted of patients with moderate renal impairment (CLcr 20-50 mL/min) and Group III consisted of patients with severe renal impairment (CLcr 20 mL/min). Although, glimepiride serum concentrations decreased with decreasing renal function, Group III had 2.3-fold higher mean AUC for M1 and an 8.6-fold higher mean AUC for M2 compared to corresponding mean AUCs in Group I. The apparent terminal half-life (T 1/2) for glimepiride did not change, while the half-lives for M1 and M2 increased as renal function decreased. Mean urinary excretion of M1 plus M2 as percentage of dose decreased from 44.4% for Group to 21.9% for Group II and 9.3% for Group III. . Hepatic Impairment: It is unknown whether there is an effect of hepatic impairment on glimepiride pharmacokinetics because the pharmacokinetics of glimepiride has not been adequately evaluated in patients with hepatic impairment. . Obese Patients: The pharmacokinetics of glimepiride and its metabolites were measured in single-dose study involving 28 patients with type diabetes who either had normal body weight or were morbidly obese. While the max, clearance, and volume of distribution of glimepiride in the morbidly obese patients were similar to those in the normal weight group, the morbidly obese had lower max and AUC than those of normal body weight. The mean max, AUC 0-24, AUC 0- values of glimepiride in normal vs. morbidly obese patients were 547 +- 218 ng/mL vs. 410 +- 124 ng/mL, 3210 +- 1030 hours.ng/mL vs. 2820 +- 1110 hours.ng/mL and 4000 +- 1320 hours.ng/mL vs. 3280 +- 1360 hours.ng/mL, respectively. . Drug Interactions: . Aspirin: In randomized, double-blind, two-period, crossover study, healthy subjects were given either placebo or aspirin gram three times daily for total treatment period of days. On Day of each study period, single mg dose of glimepiride was administered. The glimepiride doses were separated by 14-day washout period. Co-administration of aspirin and glimepiride resulted in 34% decrease in the mean glimepiride AUC and 4% decrease in the mean glimepiride max. . Colesevelam: Concomitant administration of colesevelam and glimepiride resulted in reductions in glimepiride AUC 0- and max of 18% and 8%, respectively. When glimepiride was administered hours prior to colesevelam, there was no significant change in glimepiride AUC 0- or Cmax, -6% and 3%, respectively [see Dosage and Administration 2.1) and Drug Interactions 7.4)]. . Cimetidine and Ranitidine: In randomized, open-label, 3-way crossover study, healthy subjects received either single mg dose of glimepiride alone, glimepiride with ranitidine (150 mg twice daily for days; glimepiride was administered on Day 3), or glimepiride with cimetidine (800 mg daily for days; glimepiride was administered on Day 3). Coadministration of cimetidine or ranitidine with single mg oral dose of glimepiride did not significantly alter the absorption and disposition of glimepiride. . Propranolol: In randomized, double-blind, two-period, crossover study, healthy subjects were given either placebo or propranolol 40 mg three times daily for total treatment period of days. On Day or each study period, single mg dose of glimepiride was administered. The glimepiride doses were separated by 14-day washout period. Concomitant administration of propranolol and glimepiride significantly increased glimepiride max, AUC, and 1/2 by 23%, 22%, and 15%, respectively, and decreased glimepiride CL/f by 18%. The recovery of M1 and M2 from urine was not changed. . Warfarin: In an open-label, two-way, crossover study, healthy subjects received mg of glimepiride tablets daily for 10 days. Single 25 mg doses of warfarin were administered days before starting glimepiride and on Day of glimepiride administration. The concomitant administration of glimepiride did not alter the pharmacokinetics of R- and S-warfarin enantiomers. No changes were observed in warfarin plasma protein binding. Glimepiride resulted in statistically significant decrease in the pharmacodynamic response to warfarin. The reductions in mean area under the prothrombin time (PT) curve and maximum PT values during glimepiride treatment were 3.3% and 9.9%, respectively, and are unlikely to be clinically relevant.

USE IN SPECIFIC POPULATIONS SECTION.

8. USE IN SPECIFIC POPULATIONS. Pregnancy: Based on animal data, may cause fetal harm 8.1). Nursing Mothers: Discontinue glimepiride or nursing taking into consideration the importance of glimepiride to the mother 8.3). Pediatric Patients: Not recommended because of adverse effects on body weight and hypoglycemia 8.4). Geriatric or Renally Impaired Patients: At risk for hypoglycemia with glimepiride. Use caution in dose selection and titration, and monitor closely 8.5, 8.6). Pregnancy: Based on animal data, may cause fetal harm 8.1). Nursing Mothers: Discontinue glimepiride or nursing taking into consideration the importance of glimepiride to the mother 8.3). Pediatric Patients: Not recommended because of adverse effects on body weight and hypoglycemia 8.4). Geriatric or Renally Impaired Patients: At risk for hypoglycemia with glimepiride. Use caution in dose selection and titration, and monitor closely 8.5, 8.6). 8.1 Pregnancy. Pregnancy Category CThere are no adequate and well-controlled studies of glimepiride in pregnant women. In animal studies there was no increase in congenital anomalies, but an increase in fetal deaths occurred in rats and rabbits at glimepiride doses 50 times (rats) and 0.1 times (rabbits) the maximum recommended human dose (based on body surface area). This fetotoxicity, observed only at doses inducing maternal hypoglycemia, is believed to be directly related to the pharmacologic (hypoglycemic) action of glimepiride and has been similarly notedwith other sulfonylureas. Glimepiride should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. Because data suggest that abnormal blood glucose during pregnancy is associated with higher incidence of congenital abnormalities, diabetes treatment during pregnancy should maintain blood glucose as close to normal as possible.. Nonteratogenic Effects: Prolonged severe hypoglycemia (4 to 10 days) has been reported in neonates born to mothers receiving sulfonylurea at the time of delivery. 8.3 Nursing Mothers. It is not known whether glimepiride is excreted in human milk. During pre- and post-natal studies in rats, significant concentrations of glimepiride were present in breast milk and the serum of the pups. Offspring of rats exposed to high levels of glimepiride during pregnancy and lactation developed skeletal deformities consisting of shortening, thickening, and bending of the humerus during the postnatal period. These skeletal deformations were determined to be the result of nursing from mothers exposed to glimepiride. Based on these animal data and the potential for hypoglycemia in nursing infant, decision should be made whether to discontinue nursing or discontinue glimepiride, taking into account the importance of glimepiride to the mother.. 8.4 Pediatric Use. The pharmacokinetics, efficacy and safety of glimepiride have been evaluated in pediatric patients with type diabetes as described below. Glimepiride is not recommended in pediatric patients because of its adverse effects on body weight and hypoglycemia.The pharmacokinetics of 1 mg single dose of glimepiride was evaluated in 30 patients with type diabetes (male 7; female 23) between ages 10 and 17 years. The mean (+- SD) AUC (0-last) (339+-203 ngohr/mL), Cmax (102+-48 ng/mL) and t1/2 (3.1+-1.7 hours) for glimepiride were comparable to historical data from adults (AUC 0-last) 315+-96 ngohr/mL, Cmax 103+-34 ng/mL and t1/2 5.3+-4.1 hours). The safety and efficacy of glimepiride in pediatric patients was evaluated in single-blind, 24-week trial that randomized 272 patients (8-17 years of age) with type diabetes to glimepiride (n=135) or metformin (n=137). Both treatment-naive patients (those treated with only diet and exercise for at least weeks prior to randomization) and previously treated patients (those previously treated or currently treated with other oral antidiabetic medications for at least months) were eligible to participate. Patients who were receiving oral antidiabetic agents at the time of study entry discontinued these medications before randomization without washout period. Glimepiride was initiated at mg, and then titrated up to 2, or mg (mean last dose mg) through Week 12, targeting self-monitored fasting fingerstick blood glucose 126 mg/dL. Metformin was initiated at 500 mg twice daily and titrated at Week 12 up to 1000 mg twice daily (mean last dose 1365 mg).After 24 weeks, the overall mean treatment difference in HbA 1c between glimepiride and metformin was 0.2%, favoring metformin (95% confidence interval -0.3% to +0.6%). Based on these results, the trial did not meet its primary objective of showing similar reduction in HbA 1c with glimepiride compared to metformin. Table 2. Change from Baseline in HbA 1C and Body Weight in Pediatric Patients Taking Glimepiride or Metformin Intent-to-treat population using last-observation-carried-forward for missing data (Glimepiride, n=127; metformin, n=126) adjusted for baseline HbA 1C and Tanner Stage Difference is Glimepiride metformin with positive differences favoring metformin Metformin Glimepiride Treatment-Naive Patients N=69 N=72 HbA 1C (%) Baseline (mean) 8.2 8.3 Change from baseline (adjusted LS mean) -1.2 -1.0 Adjusted Treatment Difference (95%CI) 0.2 (-0.3; 0.6) Previously Treated Patients N=57 N=55 HbA 1C (%) Baseline (mean) 9.0 8.7 Change from baseline (adjusted LS mean) -0.2 0.2 Adjusted Treatment Difference (95%CI) 0.4 (-0.4; 1.2) Body Weight (kg) N=126 N=129 Baseline (mean) 67.3 66.5 Change from baseline (adjusted LS mean)+ 0.7 2.0 Adjusted Treatment Difference (95% CI) 1.3 (0.3; 2.3)The profile of adverse reactions in pediatric patients treated with glimepiride was similar to that observed in adults [see Adverse Reactions 6)]. Hypoglycemic events documented by blood glucose values <36 mg/dL were observed in 4% of pediatric patients treated with glimepiride and in 1% of pediatric patients treated with metformin. One patient in each treatment group experienced severe hypoglycemic episode (severity was determined by the investigator based on observed signs and symptoms).. 8.5 Geriatric Use. In clinical trials of glimepiride, 1053 of 3491 patients (30%) were >65 years of age. No overall differences in safety or effectiveness were observed between these patients and younger patients, but greater sensitivity of some older individuals cannot be ruled out.There were no significant differences in glimepiride pharmacokinetics between patients with type diabetes <=65 years (n=49) and those >65 years (n=42) [see Clinical Pharmacology 12.3) ]. Glimepiride is substantially excreted by the kidney. Elderly patients are more likely to have renal impairment. In addition, hypoglycemia may be difficult to recognize in the elderly [see Dosage and Administration 2.1) and Warnings and Precautions 5.1) ]. Use caution when initiating glimepiride and increasing the dose of glimepiride in this patient population. 8.6 Renal Impairment. To minimize the risk of hypoglycemia, the recommended starting dose of glimepiride is mg daily for all patients with type diabetes and renal impairment [see Dosage and Administration 2.1) and Warnings and Precautions 5.1) ]. multiple-dose titration study was conducted in 16 patients with type diabetes and renal impairment using doses ranging from mg to mg daily for months. Baseline creatinine clearance ranged from 10-60 mL/min. The pharmacokinetics of glimepiride were evaluated in the multiple-dose titration study and the results were consistent with those observed in patients enrolled in single-dose study. In both studies, the relative total clearance of glimepiride increased when kidney function was impaired. Both studies also demonstrated that the elimination of the two major metabolites was reduced in patients with renal impairment [see Clinical Pharmacology 12.3) ].

WARNINGS AND PRECAUTIONS SECTION.

5 WARNINGS AND PRECAUTIONS. Hypoglycemia: May be severe. Ensure proper patient selection, dosing, and instructions, particularly in at-risk populations (e.g., elderly, renally impaired) and when used with other anti-diabetic medications 5.1). Hypersensitivity Reactions: Postmarketing reports include anaphylaxis, angioedema and Stevens-Johnson Syndrome. Promptly discontinue glimepiride, assess for other causes, institute appropriate monitoring and treatment, and initiate alternative treatment for diabetes 5.2). Hemolytic Anemia: Can occur if glucose 6-phosphate dehydrogenase (G6PD) deficient. Consider non-sulfonylurea alternative. 5.3). Potential Increased Risk of Cardiovascular Mortality with Sulfonylureas: Inform patient of risks, benefits and treatment alternatives 5.4). Macrovascular Outcomes: No clinical studies establishing conclusive evidence of macrovascular risk reduction with glimepiride or any other anti-diabetic drug 5.5). Hypoglycemia: May be severe. Ensure proper patient selection, dosing, and instructions, particularly in at-risk populations (e.g., elderly, renally impaired) and when used with other anti-diabetic medications 5.1). Hypersensitivity Reactions: Postmarketing reports include anaphylaxis, angioedema and Stevens-Johnson Syndrome. Promptly discontinue glimepiride, assess for other causes, institute appropriate monitoring and treatment, and initiate alternative treatment for diabetes 5.2). Hemolytic Anemia: Can occur if glucose 6-phosphate dehydrogenase (G6PD) deficient. Consider non-sulfonylurea alternative. 5.3). Potential Increased Risk of Cardiovascular Mortality with Sulfonylureas: Inform patient of risks, benefits and treatment alternatives 5.4). Macrovascular Outcomes: No clinical studies establishing conclusive evidence of macrovascular risk reduction with glimepiride or any other anti-diabetic drug 5.5). 5.1 Hypoglycemia. All sulfonylureas, including glimepiride, can cause severe hypoglycemia [see Adverse Reactions 6.1) ]. The patients ability to concentrate and react may be impaired as result of hypoglycemia. These impairments may present risk in situations where these abilities are especially important, such as driving or operating other machinery. Severe hypoglycemia can lead to unconsciousness or convulsions and may result in temporary or permanent impairment of brain function or death. Patients must be educated to recognize and manage hypoglycemia. Use caution when initiating and increasing glimepiride doses in patients who may be predisposed to hypoglycemia (e.g., the elderly, patients with renal impairment, patients on other anti- diabetic medications). Debilitated or malnourished patients, and those with adrenal, pituitary, or hepatic impairment are particularly susceptible to the hypoglycemic action of glucose-lowering medications. Hypoglycemia is also more likely to occur when caloric intake is deficient, after severe or prolonged exercise, or when alcohol is ingested.Early warning symptoms of hypoglycemia may be different or less pronounced in patients with autonomic neuropathy, the elderly, and in patients who are taking beta-adrenergic blocking medications or other sympatholytic agents. These situations may result in severe hypoglycemia before the patient is aware of the hypoglycemia.. 5.2 Hypersensitivity Reactions. There have been postmarketing reports of hypersensitivity reactions in patients treated with glimepiride, including serious reactions such as anaphylaxis, angioedema, and Stevens-Johnson Syndrome. If hypersensitivity reaction is suspected, promptly discontinue glimepiride, assess for other potential causes for the reaction, and institute alternative treatment for diabetes.. 5.3 Hemolytic Anemia. Sulfonylureas can cause hemolytic anemia in patients with glucose 6-phosphate dehydrogenase (G6PD) deficiency. Because glimepiride is sulfonylurea, use caution in patients with G6PD deficiency and consider the use of non-sulfonylurea alternative.There are also postmarketing reports of hemolytic anemia in patients receiving glimepiride who did not have known G6PD deficiency [see Adverse Reactions 6.2) ]. 5.4 Increased Risk of Cardiovascular Mortality with Sulfonylureas. The administration of oral hypoglycemic drugs has been reported to be associated with increased cardiovascular mortality as compared to treatment with diet alone or diet plus insulin. This warning is based on the study conducted by the University Group Diabetes Program (UGDP), long-term, prospective clinical trial designed to evaluate the effectiveness of glucose-lowering drugs in preventing or delaying vascular complications in patients with non-insulin-dependent diabetes. The study involved 823 patients who were randomly assigned to one of four treatment groups.UGDP reported that patients treated for to years with diet plus fixed dose of tolbutamide (1.5 grams per day) had rate of cardiovascular mortality approximately 2-1/2 times that of patients treated with diet alone. significant increase in total mortality was not observed, but the use of tolbutamide was discontinued based on the increase in cardiovascular mortality, thus limiting the opportunity for the study to show an increase in overall mortality. Despite controversy regarding the interpretation of these results, the findings of the UGDP study provide an adequate basis for this warning. The patient should be informed of the potential risks and advantages of glimepiride and of alternative modes of therapy.Although only one drug in the sulfonylurea class (tolbutamide) was included in this study, it is prudent from safety standpoint to consider that this warning may also apply to other oral hypoglycemic drugs in this class, in view of their close similarities in mode of action and chemical structure.. 5.5 Macrovascular Outcomes. There have been no clinical studies establishing conclusive evidence of macrovascular risk reduction with glimepiride or any other anti-diabetic drug.