ADVERSE REACTIONS SECTION.

6 ADVERSE REACTIONS. The most common adverse reactions (> 4% in solifenacin succinate-treated patients and placebo-treated patients) were dry mouth and constipation at both mg and 10 mg doses; and urinary tract infection and blurred vision at the 10 mg dose. 6.1) To report SUSPECTED ADVERSE REACTIONS, contact AustarPharma LLC at 1-844-375-5410 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 practice.Solifenacin Succinate Tablets have been evaluated for safety in 1811 adult patients in four randomized, placebo-controlled trials (Studies 1-4) [see Clinical Studies (14)] Expected adverse reactions of antimuscarinic agents are dry mouth, constipation, blurred vision (accommodation abnormalities), urinary retention, and dry eyes. The incidence of dry mouth and constipation in patients treated with Solifenacin Succinate Tablets was higher in the 10 mg dose group compared to the mg dose group. In the four 12-week double-blind clinical trials, severe fecal impaction, colonic obstruction, and intestinal obstruction were reported in one patient each, all in the Solifenacin Succinate Tablets 10 mg group. Angioneurotic edema was reported in one patient taking Solifenacin Succinate Tablets mg. Compared to 12 weeks of treatment with Solifenacin Succinate Tablets, the incidence and severity of adverse reactions were similar in patients who remained on drug for up to 12 months in Study [see Clinical Studies (14)] The most frequent adverse reaction leading to study discontinuation was dry mouth (1.5%). Table lists the rates of identified adverse reactions, in the four randomized, placebo-controlled trials at an incidence greater than placebo and in 1% or more of patients treated with Solifenacin Succinate Tablets or 10 mg once daily for up to 12 weeks. Table 1: Adverse Reactions Reported by >= 1% of Patients and Exceeding Placebo in Studies 1, 2, and 4Placebo (%) Solifenacin Succinate Tablets mg (%) Solifenacin Succinate Tablets 10 mg (%) Number of Patients12165781233GASTROINTESTINAL DISORDERS Dry Mouth4.210.927.6 Constipation2.95.413.4 Nausea2.01.73.3 Dyspepsia1.01.43.9 Abdominal Pain Upper1.01.91.2 Vomiting NOS0.90.21.1INFECTIONS AND INFESTATIONS Urinary Tract Infection NOS2.82.84.8 Influenza1.32.20.9 Pharyngitis NOS1.00.31.1NERVOUS SYSTEM DISORDERS Dizziness1.81.91.8EYE DISORDERS Vision Blurred1.83.84.8 Dry Eyes NOS0.60.31.6RENAL AND URINARY DISORDERS Urinary Retention0.601.4GENERAL DISORDERS AND ADMINISTRATION SITE CONDITIONS Edema Lower Limb0.70.31.1 Fatigue1.11.02.1PSYCHIATRIC DISORDERS Depression NOS0.81.20.8RESPIRATORY, THORACIC AND MEDIASTINAL DISORDERS Cough0.20.21.1VASCULAR DISORDERS Hypertension NOS0.61.40.5. 6.2 Postmarketing Experience. The following adverse reactions have been identified during post-approval use of solifenacin succinate in the U.S. and/or outside of the U.S. 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.General disorders and administration site conditions: peripheral edema, hypersensitivity reactions (including angioedema with airway obstruction, rash, pruritus, urticaria, anaphylactic reaction); Nervous system disorders: dizziness, headache, confusion, hallucinations, delirium, somnolence; Cardiac disorders: QT prolongation, Torsade de Pointes, atrial fibrillation, tachycardia, palpitations; Hepatobiliary disorders liver disorders mostly characterized by abnormal liver function tests, AST (aspartate aminotransferase), ALT (alanine aminotransferase), GGT (gamma-glutamyl transferase); Renal and urinary disorders: renal impairment, urinary retention; Metabolism and nutrition disorders: decreased appetite, hyperkalemia; Skin and subcutaneous tissue disorders: exfoliative dermatitis, erythema multiforme, dry skin; Eye disorders: glaucoma; Gastrointestinal disorders: gastroesophageal reflux disease, ileus, vomiting, abdominal pain, dysgeusia, sialadenitis; Respiratory, thoracic and mediastinal disorders: dysphonia, nasal dryness; Musculoskeletal and connective tissue disorders: muscular weakness.

CLINICAL PHARMACOLOGY SECTION.

12 CLINICAL PHARMACOLOGY. 12.1 Mechanism of Action. Solifenacin is competitive muscarinic receptor antagonist. Muscarinic receptors play an important role in several major cholinergically mediated functions, including contractions of urinary bladder smooth muscle.. 12.2 Pharmacodynamics. Cardiac Electrophysiology The effect of 10 mg and 30 mg solifenacin succinate (three times the maximum recommended dose) on the QT interval was evaluated at the time of peak plasma concentration of solifenacin in multi-dose, randomized, double-blind, placebo and positive-controlled (moxifloxacin 400 mg) trial [see Warnings and Precautions (5.6)]. After receiving placebo and moxifloxacin sequentially, subjects were randomized to one of two treatment groups. One group (n=51) completed additional sequential periods of dosing with solifenacin succinate 10, 20, and 30 mg while the second group (n=25) in parallel completed sequence of placebo and moxifloxacin. Study subjects were female volunteers aged 19 to 79 years. The 30 mg dose of solifenacin succinate (three times the highest recommended dose) was chosen for use in this study because this dose results in solifenacin exposure that covers those observed upon coadministration of 10 mg Solifenacin Succinate Tablets with strong CYP3A4 inhibitors (e.g., ketoconazole, 400 mg). Due to the sequential dose escalating nature of the study, baseline ECG measurements were separated from the final QT assessment (of the 30 mg dose level) by 33 days. The median difference from baseline in heart rate associated with the 10 and 30 mg doses of solifenacin succinate compared to placebo was -2 and beats/minute, respectively. Because significant period effect on QTc was observed, the QTc effects were analyzed utilizing the parallel placebo control arm rather than the pre-specified intra-patient analysis. Representative results are shown in Table 2.Table 2: QTc changes in msec (90% CI) from baseline at Tmax (relative to placebo)Drug/DoseFridericia method (using mean difference) Solifenacin succinate 10 mg2 (-3,6)Solifenacin succinate 30 mg8 (4,13)Results displayed are those derived from the parallel design portion of the study and represent the comparison of Group to time-matched placebo effects in Group 2.Moxifloxacin was included as positive control in this study and, given the length of the study, its effect on the QT interval was evaluated in different sessions. The placebo-subtracted mean changes (90% CI) in QTcF for moxifloxacin in the three sessions were 11 (7, 14), 12 (8, 17), and 16 (12, 21), respectively.The QT interval prolonging effect of the highest solifenacin succinate dose (three times the maximum therapeutic dose) studied was not as large as that of the positive control moxifloxacin at its recommended dose. However, the confidence intervals overlapped, and this study was not designed to draw direct statistical conclusions between the drugs or the dose levels.. 12.3 Pharmacokinetics. Absorption After oral administration of Solifenacin Succinate Tablets in healthy volunteers, peak plasma concentrations levels (C max) of solifenacin were reached within to hours after administration and, at steady-state, ranged from 32.3 to 62.9 ng/mL for the and 10 mg Solifenacin Succinate Tablets, respectively. The absolute bioavailability of solifenacin is approximately 90%, with plasma concentrations of solifenacin proportional to the dose administered. Effect of Food Solifenacin Succinate Tablets may be administered without regard to meals. single 10 mg dose administration of Solifenacin Succinate Tablets with food increased max and AUC of solifenacin by 4% and 3%, respectively. Distribution Solifenacin is approximately 98% in vivo) bound to human plasma proteins, principally to 1-acid glycoprotein. Solifenacin is highly distributed to non-CNS tissues, having mean steady-state volume of distribution of 600 L. EliminationThe elimination half-life (t 1/2) of solifenacin following chronic dosing is approximately 45-68 hours. Metabolism Solifenacin is extensively metabolized in the liver. The primary pathway for elimination is by way of CYP3A4; however, alternate metabolic pathways exist. The primary metabolic routes of solifenacin are through N-oxidation of the quinuclidin ring and 4R-hydroxylation of the tetrahydroisoquinoline ring. One pharmacologically active metabolite (4R-hydroxy solifenacin), occurring at low concentrations and unlikely to contribute significantly to clinical activity, and three pharmacologically inactive metabolites (N-glucuronide and the N-oxide and 4R-hydroxy-N-oxide of solifenacin) have been found in human plasma after oral dosing.Excretion Following the administration of 10 mg of 14C-solifenacin succinate to healthy volunteers, 69% of the radioactivity was recovered in the urine and 23% in the feces over 26 days. Less than 15% (as mean value) of the dose was recovered in the urine as intact solifenacin. The major metabolites identified in urine were N-oxide of solifenacin, 4R-hydroxy solifenacin, and 4R-hydroxy-N-oxide of solifenacin and, in feces, 4R-hydroxy solifenacin. Specific PopulationsGeriatric PatientsMultiple dose studies of Solifenacin Succinate Tablets in geriatric volunteers (65 to 80 years) showed that max, AUC and 1/2 values of solifenacin were 20-25% higher compared to the younger adult volunteers (18 to 55 years). [See Use in Specific Populations (8.5)] Patients with Renal ImpairmentIn studies with solifenacin succinate 10 mg, there was 2.1-fold increase in AUC and 1.6-fold increase in 1/2 of solifenacin in patients with severe renal impairment compared to subjects with normal renal function [see Use in Specific Populations (8.6)] Patients with Hepatic ImpairmentIn studies with solifenacin succinate 10 mg, there was 2-fold increase in the 1/2 and 35% increase in AUC of solifenacin in patients with moderate hepatic impairment compared to subjects with normal hepatic function [see Use in Specific Populations (8.7)] Solifenacin Succinate Tablets have not been studied in patients with severe hepatic impairment. Drug Interaction Studies Strong CYP3A4 InhibitorsIn crossover study, following blockade of CYP3A4 by coadministration of the strong CYP3A4 inhibitor, ketoconazole 400 mg once daily for 21 days, the mean max and AUC of solifenacin increased by 1.5 and 2.7-fold, respectively [see Dosage and Administration (2.4) and Drug Interactions (7.1)] CYP3A4 InducersBecause solifenacin is substrate of CYP3A4, inducers of CYP3A4 may decrease the concentration of solifenacin.Warfarin In crossover study, subjects received single oral dose of warfarin 25 mg on the 10 th day of dosing with either solifenacin succinate 10 mg or matching placebo once daily for 16 days. For R-warfarin, when it was coadministered with solifenacin succinate, the mean max increased by 3% and AUC decreased by 2%. For S-warfarin, when it was coadministered with solifenacin succinate, the mean max and AUC increased by 5% and 1%, respectively. Oral Contraceptives In crossover study, subjects received cycles of 21 days of oral contraceptives containing 30 ug ethinyl estradiol and 150 ug levonorgestrel. During the second cycle, subjects received additional solifenacin succinate 10 mg or matching placebo once daily for 10 days starting from the 12 th day of receipt of oral contraceptives. For ethinyl estradiol, when it was administered with solifenacin succinate, the mean max and AUC increased by 2% and 3%, respectively. For levonorgestrel, when it was administered with solifenacin succinate, the mean max and AUC decreased by 1%. Digoxin In crossover study, subjects received digoxin (loading dose of 0.25 mg on day 1, followed by 0.125 mg from days to 8) for days. Consecutively, they received solifenacin succinate 10 mg or matching placebo with digoxin 0.125 mg for an additional 10 days. When digoxin was coadministered with solifenacin succinate, the mean max and AUC increased by 13% and 4%, respectively. Drugs Metabolized by Cytochrome P450 EnzymesIn vitro studies demonstrated that, at therapeutic concentrations, solifenacin does not inhibit CYP1A1/2, 2C9, 2C19, 2D6, or 3A4 derived from human liver microsomes.

CLINICAL STUDIES SECTION.

14 CLINICAL STUDIES. Solifenacin Succinate Tablets were evaluated in four twelve-week, double-blind, randomized, placebo-controlled, parallel group, multicenter clinical trials for the treatment of overactive bladder in adult patients having symptoms of urinary frequency, urgency, and/or urge or mixed incontinence (with predominance of urge). Entry criteria required that patients have symptoms of overactive bladder for >= months duration. These studies involved 3027 patients (1811 on Solifenacin Succinate Tablets and 1216 on placebo), and approximately 90% of these patients completed the 12-week studies. Two of the four studies evaluated the and 10 mg Solifenacin Succinate Tablets doses (Studies and 2) and the other two evaluated only the 10 mg dose (Studies and 4). All patients completing the 12-week studies were eligible to enter an open-label, long-term extension study (Study 5) and 81% of patients enrolling completed the additional 40-week treatment period. The majority of patients were Caucasian (93%) and female (80%) with mean age of 58 years.The primary endpoint in all four trials was the mean change from baseline to 12 weeks in number of micturitions/24 hours. Secondary endpoints included mean change from baseline to 12 weeks in number of incontinence episodes/24 hours, and mean volume voided per micturition.The efficacy of Solifenacin Succinate Tablets was similar across patient age groups and gender. The mean reduction in the number of micturitions per 24 hours was significantly greater with Solifenacin Succinate Tablets mg (2.3; < 0.001) and Solifenacin Succinate Tablets 10 mg (2.7; < 0.001) compared to placebo (1.4).The mean reduction in the number of incontinence episodes per 24 hours was significantly greater with Solifenacin Succinate Tablets mg (1.5; < 0.001) and Solifenacin Succinate Tablets 10 mg (1.8; < 0.001) treatment groups compared to the placebo treatment group (1.1). The mean increase in the volume voided per micturition was significantly greater with Solifenacin Succinate Tablets mg (32.3 mL; < 0.001) and Solifenacin Succinate Tablets 10 mg (42.5 mL; < 0.001) compared with placebo (8.5 mL).The results for the primary and secondary endpoints in the four individual 12-week clinical studies of Solifenacin Succinate Tablets are reported in Tables through 6.Table 3: Mean Changes from Baseline to Week 12 in Efficacy Endpoints in Study 1ParameterPlacebo (N=253) Mean (SE) Solifenacin Succinate Tablets mg (N=266) Mean (SE) Solifenacin Succinate Tablets 10 mg (N=264) Mean (SE) Urinary Frequency (Number of Micturitions/24 hours) Baseline Reduction value vs. placebo12.2 (0.26)1.2 (0.21)12.1 (0.24)2.2 (0.18)< 0.00112.3 (0.24)2.6 (0.20)< 0.001Number of Incontinence Episodes/24 hours+ Baseline Reduction value vs. placebo2.7 (0.23)0.8 (0.18)2.6 (0.22)1.4 (0.15)< 0.012.6 (0.23)1.5 (0.18)< 0.01Volume Voided per Micturition [mL]+ Baseline Increase value vs. placebo143.8 (3.37)7.4 (2.28)149.6 (3.35)32.9 (2.92)< 0.001147.2 (3.15)39.2 (3.11)< 0.001 Primary endpoint +Secondary endpoint Table 4: Mean Changes from Baseline to Week 12 in Efficacy Endpoints in Study 2ParameterPlacebo (N=281) Mean (SE) Solifenacin Succinate Tablets mg (N=286) Mean (SE) Solifenacin Succinate Tablets 10 mg (N=290) Mean (SE) Urinary Frequency (Number of Micturitions/24 hours) Baseline Reduction value vs. placebo12.3 (0.23)1.7 (0.19)12.1 (0.23)2.4 (0.17)< 0.00112.1 (0.21)2.9 (0.18)< 0.001Number of Incontinence Episodes/24 hours+ Baseline Reduction value vs. placebo3.2 (0.24)1.3 (0.19)2.6 (0.18)1.6 (0.16)< 0.012.8 (0.20)1.6 (0.18)0.016Volume Voided per Micturition [mL]+ Baseline Increase value vs. placebo147.2 (3.18)11.3 (2.52)148.5 (3.16)31.8 (2.94)< 0.001145.9 (3.42)36.6 (3.04)< 0.001Primary endpoint +Secondary endpoint Table 5: Mean Changes from Baseline to Week 12 in Efficacy Endpoints in Study 3ParameterPlacebo (N=309) Mean (SE) Solifenacin Succinate Tablets 10 mg (N=306) Mean (SE) Urinary Frequency (Number of Micturitions/24 hours) Baseline Reduction value vs. placebo11.5 (0.18)1.5 (0.15)11.7 (0.18)3.0 (0.15)< 0.001Number of Incontinence Episodes/24 hours+ Baseline Reduction value vs. placebo3.0 (0.20)1.1 (0.16)3.1 (0.22)2.0 (0.19)< 0.001Volume Voided per Micturition [mL]+ Baseline Increase value vs. placebo190.3 (5.48)2.7 (3.15)183.5 (4.97)47.2 (3.79)< 0.001Primary endpoint +Secondary endpoint Table 6: Mean Changes from Baseline to Week 12 in Efficacy Endpoints in Study 4ParameterPlacebo (N=295) Mean (SE) Solifenacin Succinate Tablets 10 mg (N=298) Mean (SE) Urinary Frequency (Number of Micturitions/24 hours) Baseline Reduction value vs. placebo11.8 (0.18)1.3 (0.16)11.5 (0.18)2.4 (0.15)< 0.001Number of Incontinence Episodes/24 hours+ Baseline Reduction value vs. placebo2.9 (0.18)1.2 (0.15)2.9 (0.17)2.0 (0.15)< 0.001Volume Voided per Micturition [mL]+ Baseline Increase value vs. placebo175.7 (4.44)13.0 (3.45)174.1 (4.15)46.4 (3.73)< 0.001 Primary endpoint +Secondary endpoint.

DOSAGE & ADMINISTRATION SECTION.

2 DOSAGE AND ADMINISTRATION. 5 mg tablet taken orally once daily, and if well tolerated may be increased to 10 mg once daily. 2.1) Do not exceed the mg dose of Solifenacin Succinate Tablets in patients with: Severe renal impairment creatinine clearance 30 mL/min/1.73 2. 2.2, 8.6) Moderate hepatic impairment (Child-Pugh B). Solifenacin Succinate Tablets are not recommended in patients with severe hepatic impairment (Child-Pugh C). 2.3, 8.7) Concomitant use of strong CYP3A4 inhibitors. 2.4, 7.1) 5 mg tablet taken orally once daily, and if well tolerated may be increased to 10 mg once daily. 2.1) Do not exceed the mg dose of Solifenacin Succinate Tablets in patients with: Severe renal impairment creatinine clearance 30 mL/min/1.73 2. 2.2, 8.6) Moderate hepatic impairment (Child-Pugh B). Solifenacin Succinate Tablets are not recommended in patients with severe hepatic impairment (Child-Pugh C). 2.3, 8.7) Concomitant use of strong CYP3A4 inhibitors. 2.4, 7.1) Severe renal impairment creatinine clearance 30 mL/min/1.73 2. 2.2, 8.6) Moderate hepatic impairment (Child-Pugh B). Solifenacin Succinate Tablets are not recommended in patients with severe hepatic impairment (Child-Pugh C). 2.3, 8.7) Concomitant use of strong CYP3A4 inhibitors. 2.4, 7.1) 2.1 Dosing Information. The recommended oral dose of Solifenacin Succinate Tablets is mg once daily. If the mg dose is well tolerated, the dose may be increased to 10 mg once daily.Solifenacin Succinate Tablets should be taken with water and swallowed whole. Solifenacin Succinate Tablets can be administered with or without food.. 2.2 Dosing Recommendations in Patients with Renal Impairment. Do not exceed mg once daily in patients with severe renal impairment (CL cr 30 mL/min/1.73 2) [see Use in Specific Populations (8.6)] . 2.3 Dosing Recommendations in Patients with Hepatic Impairment. Do not exceed mg once daily in patients with moderate hepatic impairment (Child-Pugh B). Do not use Solifenacin Succinate Tablets in patients with severe hepatic impairment (Child-Pugh C) [see Use in Specific Populations (8.7)] . 2.4 Dosing Recommendations in Patients Taking CYP3A4 Inhibitors. Do not exceed mg once daily when Solifenacin Succinate Tablets are administered with strong CYP3A4 inhibitors such as ketoconazole [see Drug Interactions (7.1)].

INFORMATION FOR PATIENTS SECTION.

17 PATIENT COUNSELING INFORMATION. Advise the patient to read the FDA-approved patient labeling (Patient Information).Angioedema and Anaphylactic ReactionsInform patients that angioedema and anaphylactic reactions have been reported in patients treated with Solifenacin Succinate Tablets. Angioedema and anaphylactic reactions may be life-threatening. Advise patients to promptly discontinue Solifenacin Succinate Tablets therapy and seek immediate attention if they experience edema of the tongue or laryngopharynx, or difficulty breathing [see Contraindications (4) and Warnings and Precautions (5.1)] Urinary RetentionInform patients that Solifenacin Succinate Tablets may cause urinary retention in patients with conditions associated with bladder outlet obstruction [see Warnings and Precautions (5.2)] Gastrointestinal DisordersInform patients that Solifenacin Succinate Tablets may cause further decrease in gastrointestinal motility in patients with conditions associated with decreased gastrointestinal motility. Solifenacin Succinate Tablets have been associated with constipation and dry mouth. Advise patients to contact their health care providers if they experience severe abdominal pain or become constipated for or more days [see Warnings and Precautions (5.3)] Central Nervous System EffectsBecause Solifenacin Succinate Tablets, like other antimuscarinic agents, may cause central nervous system effects or blurred vision, advise patients to exercise caution in decisions to engage in potentially dangerous activities until the drugs effect on the patient has been determined [see Warnings and Precautions (5.4)] Narrow-Angle GlaucomaInform patients that Solifenacin Succinate Tablets, like other antimuscarinics, may cause worsening of the glaucoma condition in patients with narrow-angle glaucoma [see Warnings and Precautions (5.5)] Dry SkinInform patients that Solifenacin Succinate Tablets, like other antimuscarinics, may cause dry skin due to decreased sweating. Heat prostration due to decreased sweating can occur when Solifenacin Succinate Tablets are used in hot environment [see Adverse Reactions (6.2)] Manufactured by: AustarPharma, LLC18 Mayfield Ave, Edison, NJ 08837Revised:09/2020LBL343.

NONCLINICAL TOXICOLOGY SECTION.

13 NONCLINICAL TOXICOLOGY. 13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility. No increase in tumors was found following the administration of solifenacin succinate to male and female mice for 104 weeks at doses up to 200 mg/kg/day (5 and times, respectively, of the exposure at the maximum recommended human dose [MRHD] of 10 mg), and male and female rats for 104 weeks at doses up to 20 and 15 mg/kg/day, respectively (<1 times the exposure at the MRHD).Solifenacin succinate was not mutagenic in the in vitro Salmonella typhimurium or Escherichia coli microbial mutagenicity test or chromosomal aberration test in human peripheral blood lymphocytes with or without metabolic activation or in the in vivo micronucleus test in rats. Solifenacin succinate had no effect on reproductive function, fertility, or early embryonic development of the fetus in male and female mice treated with 250 mg/kg/day (13 times the exposure at the MRHD) of solifenacin succinate, and in male rats treated with 50 mg/kg/day (<1 times the exposure at the MRHD) and female rats treated with 100 mg/kg/day (1.7 times the exposure at the MRHD) of solifenacin succinate.. 13.2 Animal Toxicology and/or Pharmacology. Juvenile Animal Toxicology DataDose-related increased mortality without preceding clinical signs occurred in juvenile mice treated before weaning for duration of 12 weeks, from day 10 after birth, with doses that achieved pharmacological effect. Animals dosed from postnatal day 10 onwards had higher mortality compared to the mortality in adult mice. No increased frequency in mortality was observed in juvenile mice that were treated after weaning for duration of weeks, from day 21 after birth onwards. Plasma exposure at postnatal day 10 was higher than in adult mice; the systemic exposure at postnatal day 21 was comparable to the systemic exposure in adult mice.

PHARMACODYNAMICS SECTION.

12.2 Pharmacodynamics. Cardiac Electrophysiology The effect of 10 mg and 30 mg solifenacin succinate (three times the maximum recommended dose) on the QT interval was evaluated at the time of peak plasma concentration of solifenacin in multi-dose, randomized, double-blind, placebo and positive-controlled (moxifloxacin 400 mg) trial [see Warnings and Precautions (5.6)]. After receiving placebo and moxifloxacin sequentially, subjects were randomized to one of two treatment groups. One group (n=51) completed additional sequential periods of dosing with solifenacin succinate 10, 20, and 30 mg while the second group (n=25) in parallel completed sequence of placebo and moxifloxacin. Study subjects were female volunteers aged 19 to 79 years. The 30 mg dose of solifenacin succinate (three times the highest recommended dose) was chosen for use in this study because this dose results in solifenacin exposure that covers those observed upon coadministration of 10 mg Solifenacin Succinate Tablets with strong CYP3A4 inhibitors (e.g., ketoconazole, 400 mg). Due to the sequential dose escalating nature of the study, baseline ECG measurements were separated from the final QT assessment (of the 30 mg dose level) by 33 days. The median difference from baseline in heart rate associated with the 10 and 30 mg doses of solifenacin succinate compared to placebo was -2 and beats/minute, respectively. Because significant period effect on QTc was observed, the QTc effects were analyzed utilizing the parallel placebo control arm rather than the pre-specified intra-patient analysis. Representative results are shown in Table 2.Table 2: QTc changes in msec (90% CI) from baseline at Tmax (relative to placebo)Drug/DoseFridericia method (using mean difference) Solifenacin succinate 10 mg2 (-3,6)Solifenacin succinate 30 mg8 (4,13)Results displayed are those derived from the parallel design portion of the study and represent the comparison of Group to time-matched placebo effects in Group 2.Moxifloxacin was included as positive control in this study and, given the length of the study, its effect on the QT interval was evaluated in different sessions. The placebo-subtracted mean changes (90% CI) in QTcF for moxifloxacin in the three sessions were 11 (7, 14), 12 (8, 17), and 16 (12, 21), respectively.The QT interval prolonging effect of the highest solifenacin succinate dose (three times the maximum therapeutic dose) studied was not as large as that of the positive control moxifloxacin at its recommended dose. However, the confidence intervals overlapped, and this study was not designed to draw direct statistical conclusions between the drugs or the dose levels.

PHARMACOKINETICS SECTION.

12.3 Pharmacokinetics. Absorption After oral administration of Solifenacin Succinate Tablets in healthy volunteers, peak plasma concentrations levels (C max) of solifenacin were reached within to hours after administration and, at steady-state, ranged from 32.3 to 62.9 ng/mL for the and 10 mg Solifenacin Succinate Tablets, respectively. The absolute bioavailability of solifenacin is approximately 90%, with plasma concentrations of solifenacin proportional to the dose administered. Effect of Food Solifenacin Succinate Tablets may be administered without regard to meals. single 10 mg dose administration of Solifenacin Succinate Tablets with food increased max and AUC of solifenacin by 4% and 3%, respectively. Distribution Solifenacin is approximately 98% in vivo) bound to human plasma proteins, principally to 1-acid glycoprotein. Solifenacin is highly distributed to non-CNS tissues, having mean steady-state volume of distribution of 600 L. EliminationThe elimination half-life (t 1/2) of solifenacin following chronic dosing is approximately 45-68 hours. Metabolism Solifenacin is extensively metabolized in the liver. The primary pathway for elimination is by way of CYP3A4; however, alternate metabolic pathways exist. The primary metabolic routes of solifenacin are through N-oxidation of the quinuclidin ring and 4R-hydroxylation of the tetrahydroisoquinoline ring. One pharmacologically active metabolite (4R-hydroxy solifenacin), occurring at low concentrations and unlikely to contribute significantly to clinical activity, and three pharmacologically inactive metabolites (N-glucuronide and the N-oxide and 4R-hydroxy-N-oxide of solifenacin) have been found in human plasma after oral dosing.Excretion Following the administration of 10 mg of 14C-solifenacin succinate to healthy volunteers, 69% of the radioactivity was recovered in the urine and 23% in the feces over 26 days. Less than 15% (as mean value) of the dose was recovered in the urine as intact solifenacin. The major metabolites identified in urine were N-oxide of solifenacin, 4R-hydroxy solifenacin, and 4R-hydroxy-N-oxide of solifenacin and, in feces, 4R-hydroxy solifenacin. Specific PopulationsGeriatric PatientsMultiple dose studies of Solifenacin Succinate Tablets in geriatric volunteers (65 to 80 years) showed that max, AUC and 1/2 values of solifenacin were 20-25% higher compared to the younger adult volunteers (18 to 55 years). [See Use in Specific Populations (8.5)] Patients with Renal ImpairmentIn studies with solifenacin succinate 10 mg, there was 2.1-fold increase in AUC and 1.6-fold increase in 1/2 of solifenacin in patients with severe renal impairment compared to subjects with normal renal function [see Use in Specific Populations (8.6)] Patients with Hepatic ImpairmentIn studies with solifenacin succinate 10 mg, there was 2-fold increase in the 1/2 and 35% increase in AUC of solifenacin in patients with moderate hepatic impairment compared to subjects with normal hepatic function [see Use in Specific Populations (8.7)] Solifenacin Succinate Tablets have not been studied in patients with severe hepatic impairment. Drug Interaction Studies Strong CYP3A4 InhibitorsIn crossover study, following blockade of CYP3A4 by coadministration of the strong CYP3A4 inhibitor, ketoconazole 400 mg once daily for 21 days, the mean max and AUC of solifenacin increased by 1.5 and 2.7-fold, respectively [see Dosage and Administration (2.4) and Drug Interactions (7.1)] CYP3A4 InducersBecause solifenacin is substrate of CYP3A4, inducers of CYP3A4 may decrease the concentration of solifenacin.Warfarin In crossover study, subjects received single oral dose of warfarin 25 mg on the 10 th day of dosing with either solifenacin succinate 10 mg or matching placebo once daily for 16 days. For R-warfarin, when it was coadministered with solifenacin succinate, the mean max increased by 3% and AUC decreased by 2%. For S-warfarin, when it was coadministered with solifenacin succinate, the mean max and AUC increased by 5% and 1%, respectively. Oral Contraceptives In crossover study, subjects received cycles of 21 days of oral contraceptives containing 30 ug ethinyl estradiol and 150 ug levonorgestrel. During the second cycle, subjects received additional solifenacin succinate 10 mg or matching placebo once daily for 10 days starting from the 12 th day of receipt of oral contraceptives. For ethinyl estradiol, when it was administered with solifenacin succinate, the mean max and AUC increased by 2% and 3%, respectively. For levonorgestrel, when it was administered with solifenacin succinate, the mean max and AUC decreased by 1%. Digoxin In crossover study, subjects received digoxin (loading dose of 0.25 mg on day 1, followed by 0.125 mg from days to 8) for days. Consecutively, they received solifenacin succinate 10 mg or matching placebo with digoxin 0.125 mg for an additional 10 days. When digoxin was coadministered with solifenacin succinate, the mean max and AUC increased by 13% and 4%, respectively. Drugs Metabolized by Cytochrome P450 EnzymesIn vitro studies demonstrated that, at therapeutic concentrations, solifenacin does not inhibit CYP1A1/2, 2C9, 2C19, 2D6, or 3A4 derived from human liver microsomes.

PREGNANCY SECTION.

8.1 Pregnancy. Risk SummaryThere are no studies with the use of solifenacin succinate in pregnant women to inform drug-associated risk of major birth defects, miscarriages, or adverse maternal or fetal outcomes. No adverse developmental outcomes were observed in animal reproduction studies with oral administration of solifenacin succinate to pregnant mice during the period of organogenesis at dose resulting in 1.2 times the systemic exposure at the maximum recommended human dose (MRHD) of 10 mg/day. However, administration of doses 3.6 times and greater than the MRHD during organogenesis produced maternal toxicity in the pregnant mice and resulted in developmental toxicity and reduced fetal body weights in offspring [see Data]. In the U.S. general population, the estimated background risk of major birth defects or miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.DataAnimal DataOral administration of 14C-solifenacin succinate to pregnant mice resulted in the recovery of radiolabel in the fetus indicating that solifenacin-related product can cross the placental barrier. In pregnant mice, administration of solifenacin succinate at dose of 250 mg/kg/day (7.9 times the systemic exposure at the MRHD of 10 mg), resulted in an increased incidence of cleft palate and increased maternal lethality. Administration of solifenacin succinate to pregnant mice during organogenesis at greater than or equal to 3.6 times (100 mg/kg/day and greater) the systemic exposure at the MRHD, resulted in reduced fetal body weights and reduced maternal body weight gain. No embryo-fetal toxicity or teratogenicity was observed in fetuses from pregnant mice treated with solifenacin succinate at dose of 30 mg/kg/day (1.2 times the systemic exposure at the MRHD). Administration of solifenacin succinate to pregnant rats and rabbits at dose of 50 mg/kg/day (< times and 1.8 times the systemic exposure at the MRHD, respectively), resulted in no findings of embryo-fetal toxicity. Oral pre- and post-natal administration of solifenacin succinate at 100 mg/kg/day (3.6 times the systemic exposure at the MRHD) during the period of organogenesis through weaning, resulted in reduced peripartum and postnatal survival, reduced body weight gain by the pups, and delayed physical development (eye opening and vaginal patency). An increase in the percentage of male offspring was also observed in litters from offspring (F2 generation) exposed to maternal doses of 250 mg/kg/day. There were no effects on natural delivery in mice treated with 1.2 times (30 mg/kg/day) the expected systemic exposure at the MRHD.

SPL PATIENT PACKAGE INSERT SECTION.

Patient InformationSolifenacin Succinate Tablets(so-li-fen-a-cin suc-ci-nate tab-lets)Read the Patient Information that comes with Solifenacin Succinate Tabletsbefore you start taking it and each time you get refill. There may be new information. This leaflet does not take the place of talking with your doctor about your medical condition or treatment.What are Solifenacin Succinate Tablets Solifenacin Succinate Tablets are prescription medicine for adults used to treat the following symptoms due to condition called overactive bladder: Urge urinary incontinence: strong need to urinate with leaking or wetting accidentsUrgency: strong need to urinate right awayFrequency: urinating oftenSolifenacin Succinate mg and 10 mg tablets are not approved for use in children.Who should not take Solifenacin Succinate Tablets Do not take Solifenacin Succinate Tablets if you: are not able to empty your bladder (urinary retention)have delayed or slow emptying of your stomach (gastric retention)have an eye problem called uncontrolled narrow-angle glaucomaare allergic to solifenacin succinate or any of the ingredients in Solifenacin Succinate Tablets. See the end of this leaflet for complete list of ingredients.What should tell my doctor before taking Solifenacin Succinate Tablets Before you take Solifenacin Succinate Tablets, tell your doctor if you: have any stomach or intestinal problems or problems with constipationhave trouble emptying your bladder or you have weak urine streamhave an eye problem called narrow-angle glaucomahave liver problemshave kidney problemshave rare heart problem called QT prolongationare pregnant or plan to become pregnant. It is not known if Solifenacin Succinate Tablets will harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant.are breastfeeding or plan to breastfeed. It is not known if Solifenacin Succinate Tablets pass into your breast milk. You and your doctor should decide if you will take Solifenacin Succinate Tablets or breastfeed.Tell your doctor about all the medicines you take, including prescription and nonprescription medicines, vitamins, and herbal supplements. Solifenacin Succinate Tablets may affect the way other medicines work, and other medicines may affect how Solifenacin Succinate Tablets works. How should take Solifenacin Succinate TabletsTake Solifenacin Succinate Tablets exactly as your doctor tells you to take it.You should take Solifenacin Succinate tablet time day.You should take Solifenacin Succinate Tablets with water and swallow the tablet whole.You can take Solifenacin Succinate Tablets with or without food.If you miss dose of Solifenacin Succinate Tablets, begin taking Solifenacin Succinate Tablets again the next day. Do not take doses of Solifenacin Succinate Tablets the same day.If you take too much Solifenacin Succinate Tablets, call your doctor or go to the nearest hospital emergency room right away.What should avoid while taking Solifenacin Succinate Tablets Solifenacin Succinate Tablets can cause blurred vision or drowsiness. Do not drive or operate heavy machinery until you know how Solifenacin Succinate Tablets affect you.What are the possible side effects of Solifenacin Succinate Tablets Solifenacin Succinate Tablets may cause serious side effects including:Serious allergic reaction. Stop taking Solifenacin Succinate Tablets and get medical help right away if you have: hives, skin rash or swelling severe itching swelling of your face, mouth or tongue trouble breathing The most common side effects of Solifenacin Succinate Tablets include:dry mouthconstipation. Call your doctor if you get severe stomach area (abdominal) pain or become constipated for or more days.urinary tract infectionblurred visionOther side effects have been observed with anticholinergic drugs such as Solifenacin Succinate Tablets and may include:dry skin due to decreased sweating. Heat exhaustion or heat stroke can happen due to decreased sweating when Solifenacin Succinate Tablets are used in hot environments. Symptoms may include: decreased sweating dizziness tiredness nausea increase in body temperature Tell your doctor if you have any side effect that bothers you or that does not go away.These are not all the possible side effects of Solifenacin Succinate Tablets. For more information, ask your doctor or pharmacist.Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088. How should store Solifenacin Succinate Tablets Store Solifenacin Succinate Tablets between 59F to 86F (15C to 30C). Keep the bottle closed.Safely throw away medicine that is out of date or no longer need.Keep Solifenacin Succinate Tablets and all medicines out of the reach of children. General information about the safe and effective use of Solifenacin Succinate Tablets. Medicines are sometimes prescribed for purposes other than those listed in Patient Information leaflets. Do not use Solifenacin Succinate Tablets for condition for which it was not prescribed. Do not give Solifenacin Succinate Tablets to other people, even if they have the same symptoms you have. It may harm them.This leaflet summarizes the most important information about Solifenacin Succinate Tablets. If you would like more information, talk with your doctor. You can ask your doctor or pharmacist for information about Solifenacin Succinate Tablets that is written for health professionals.What are the ingredients in Solifenacin Succinate Tablets Active ingredient: solifenacin succinate Inactive ingredients: lactose monohydrate, pregelatinized starch, hypromellose 2910, magnesium stearate, triacetin, polyethylene glycol 3350 and titanium dioxide with yellow ferric oxide and red ferric oxide. What is overactive bladder Overactive bladder occurs when you cannot control your bladder contractions. When these muscle contractions happen too often or cannot be controlled you can get symptoms of overactive bladder, which are urinary frequency, urinary urgency, and urinary incontinence (leakage).Manufactured by:AustarPharma, LLC18 Mayfield Ave, Edison, NJ 08837Revised:09/2020LBL344For more information, call 1-844-375-5410.. Urge urinary incontinence: strong need to urinate with leaking or wetting accidents. Urgency: strong need to urinate right away. Frequency: urinating often. are not able to empty your bladder (urinary retention). have delayed or slow emptying of your stomach (gastric retention). have an eye problem called uncontrolled narrow-angle glaucoma. are allergic to solifenacin succinate or any of the ingredients in Solifenacin Succinate Tablets. See the end of this leaflet for complete list of ingredients.. have any stomach or intestinal problems or problems with constipation. have trouble emptying your bladder or you have weak urine stream. have an eye problem called narrow-angle glaucoma. have liver problems. have kidney problems. have rare heart problem called QT prolongation. are pregnant or plan to become pregnant. It is not known if Solifenacin Succinate Tablets will harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant.. are breastfeeding or plan to breastfeed. It is not known if Solifenacin Succinate Tablets pass into your breast milk. You and your doctor should decide if you will take Solifenacin Succinate Tablets or breastfeed.. Take Solifenacin Succinate Tablets exactly as your doctor tells you to take it.. You should take Solifenacin Succinate tablet time day.. You should take Solifenacin Succinate Tablets with water and swallow the tablet whole.. You can take Solifenacin Succinate Tablets with or without food.. If you miss dose of Solifenacin Succinate Tablets, begin taking Solifenacin Succinate Tablets again the next day. Do not take doses of Solifenacin Succinate Tablets the same day.. If you take too much Solifenacin Succinate Tablets, call your doctor or go to the nearest hospital emergency room right away.. Serious allergic reaction. Stop taking Solifenacin Succinate Tablets and get medical help right away if you have: dry mouth. constipation. Call your doctor if you get severe stomach area (abdominal) pain or become constipated for or more days.. urinary tract infection. blurred vision. dry skin due to decreased sweating. Heat exhaustion or heat stroke can happen due to decreased sweating when Solifenacin Succinate Tablets are used in hot environments. Symptoms may include:. Store Solifenacin Succinate Tablets between 59F to 86F (15C to 30C). Keep the bottle closed.. Safely throw away medicine that is out of date or no longer need.

USE IN SPECIFIC POPULATIONS SECTION.

8 USE IN SPECIFIC POPULATIONS. 8.1 Pregnancy. Risk SummaryThere are no studies with the use of solifenacin succinate in pregnant women to inform drug-associated risk of major birth defects, miscarriages, or adverse maternal or fetal outcomes. No adverse developmental outcomes were observed in animal reproduction studies with oral administration of solifenacin succinate to pregnant mice during the period of organogenesis at dose resulting in 1.2 times the systemic exposure at the maximum recommended human dose (MRHD) of 10 mg/day. However, administration of doses 3.6 times and greater than the MRHD during organogenesis produced maternal toxicity in the pregnant mice and resulted in developmental toxicity and reduced fetal body weights in offspring [see Data]. In the U.S. general population, the estimated background risk of major birth defects or miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.DataAnimal DataOral administration of 14C-solifenacin succinate to pregnant mice resulted in the recovery of radiolabel in the fetus indicating that solifenacin-related product can cross the placental barrier. In pregnant mice, administration of solifenacin succinate at dose of 250 mg/kg/day (7.9 times the systemic exposure at the MRHD of 10 mg), resulted in an increased incidence of cleft palate and increased maternal lethality. Administration of solifenacin succinate to pregnant mice during organogenesis at greater than or equal to 3.6 times (100 mg/kg/day and greater) the systemic exposure at the MRHD, resulted in reduced fetal body weights and reduced maternal body weight gain. No embryo-fetal toxicity or teratogenicity was observed in fetuses from pregnant mice treated with solifenacin succinate at dose of 30 mg/kg/day (1.2 times the systemic exposure at the MRHD). Administration of solifenacin succinate to pregnant rats and rabbits at dose of 50 mg/kg/day (< times and 1.8 times the systemic exposure at the MRHD, respectively), resulted in no findings of embryo-fetal toxicity. Oral pre- and post-natal administration of solifenacin succinate at 100 mg/kg/day (3.6 times the systemic exposure at the MRHD) during the period of organogenesis through weaning, resulted in reduced peripartum and postnatal survival, reduced body weight gain by the pups, and delayed physical development (eye opening and vaginal patency). An increase in the percentage of male offspring was also observed in litters from offspring (F2 generation) exposed to maternal doses of 250 mg/kg/day. There were no effects on natural delivery in mice treated with 1.2 times (30 mg/kg/day) the expected systemic exposure at the MRHD. 8.2 Lactation. Risk SummaryThere is no information on the presence of solifenacin in human milk, the effects on the breastfed child, or the effects on milk production. Solifenacin is present in mouse milk [see Data]. When drug is present in animal milk, it is likely that the drug will be present in human milk. The developmental and health benefits of breastfeeding should be considered along with the mothers clinical need for solifenacin succinate and any potential adverse effects on the breastfed child from solifenacin succinate or from the underlying maternal condition. DataAnimal DataOral administration of 14C-solifenacin succinate to lactating mice resulted in the recovery of radioactivity in maternal milk. Lactating female mice orally administered solifenacin succinate at maternally toxic dose of 100 mg/kg/day (3.6 times the systemic exposure at the MRHD) had increased postpartum pup mortality, pups with reduced body weights, or delays in the onset of reflex and physical development. Pups from lactating dams orally administered solifenacin succinate at dose of 30 mg/kg/day (1.2 times the systemic exposure at the MRHD) had no discernible adverse findings. The concentrations of solifenacin in animal milk does not necessarily predict the concentration of drug in human milk. 8.4 Pediatric Use. The safety and effectiveness of Solifenacin Succinate Tablets have not been established in pediatric patients.. 8.5 Geriatric Use. In placebo-controlled clinical studies, similar safety and effectiveness were observed between geriatric patients (623 patients >= 65 years and 189 patients >= 75 years) and younger adult patients (1188 patients 65 years) treated with Solifenacin Succinate Tablets [see Clinical Pharmacology (12.3)] . 8.6 Renal Impairment. Solifenacin plasma concentrations are greater in patients with severe renal impairment compared to subjects with normal renal function [see Clinical Pharmacology (12.3)] Because increased solifenacin plasma concentrations increase the risk of antimuscarinic adverse reactions, the maximum recommended dose of Solifenacin Succinate Tablets in patients with severe renal impairment (CL cr 30 mL/min/1.73 2) is mg once daily [see Dosage and Administration (2.2)] The recommended dose in patients with mild or moderate renal impairment is the same as in patients with normal renal function. 8.7 Hepatic Impairment. Solifenacin plasma concentrations are greater in patients with moderate hepatic impairment compared to subjects with normal hepatic function [see Clinical Pharmacology (12.3)] Because increased solifenacin plasma concentrations increase the risk of antimuscarinic adverse reactions, the maximum recommended dose of Solifenacin Succinate Tablets in patients with moderate hepatic impairment (Child-Pugh B) is mg once daily [see Dosage and Administration (2.3)] and Solifenacin Succinate Tablets are not recommended for use in patients with severe hepatic impairment (Child-Pugh C). 8.8 Gender. The pharmacokinetics of solifenacin is not significantly influenced by gender.

WARNINGS AND PRECAUTIONS SECTION.

5 WARNINGS AND PRECAUTIONS. Angioedema and Anaphylactic Reactions: Promptly discontinue Solifenacin Succinate Tablets and provide appropriate therapy. 5.1) Urinary Retention: Solifenacin Succinate Tablets are not recommended for use in patients with clinically significant bladder outlet obstruction. 5.2) Gastrointestinal Disorders: Solifenacin Succinate Tablets are not recommended for use in patients with decreased gastrointestinal motility. 5.3) Central Nervous System Effects: Somnolence has been reported with Solifenacin Succinate Tablets. Advise patients not to drive or operate heavy machinery until they know how Solifenacin Succinate Tablets affect them. 5.4) Controlled Narrow-Angle Glaucoma: Use Solifenacin Succinate Tablets with caution in patients being treated for narrow-angle glaucoma. 5.5) QT Prolongation in Patients at High Risk of QT Prolongation: Solifenacin Succinate Tablets are not recommended for use in patients at high risk of QT prolongation, including patients with known history of QT prolongation and patients taking medications known to prolong the QT interval. 5.6) Angioedema and Anaphylactic Reactions: Promptly discontinue Solifenacin Succinate Tablets and provide appropriate therapy. 5.1) Urinary Retention: Solifenacin Succinate Tablets are not recommended for use in patients with clinically significant bladder outlet obstruction. 5.2) Gastrointestinal Disorders: Solifenacin Succinate Tablets are not recommended for use in patients with decreased gastrointestinal motility. 5.3) Central Nervous System Effects: Somnolence has been reported with Solifenacin Succinate Tablets. Advise patients not to drive or operate heavy machinery until they know how Solifenacin Succinate Tablets affect them. 5.4) Controlled Narrow-Angle Glaucoma: Use Solifenacin Succinate Tablets with caution in patients being treated for narrow-angle glaucoma. 5.5) QT Prolongation in Patients at High Risk of QT Prolongation: Solifenacin Succinate Tablets are not recommended for use in patients at high risk of QT prolongation, including patients with known history of QT prolongation and patients taking medications known to prolong the QT interval. 5.6) 5.1 Angioedema and Anaphylactic Reactions. Angioedema of the face, lips, tongue, and/or larynx have been reported with solifenacin succinate. In some cases, angioedema occurred after the first dose, however, cases have been reported to occur hours after the first dose or after multiple doses. Anaphylactic reactions have also been reported in patients treated with solifenacin succinate. Angioedema associated with upper airway swelling and anaphylactic reactions may be life-threatening.Solifenacin Succinate Tablets are contraindicated in patients with known or suspected hypersensitivity to solifenacin succinate [see Contraindications (4)] If involvement of the tongue, hypopharynx, or larynx occurs, promptly discontinue Solifenacin Succinate Tablets andprovide appropriate therapy and/or measures necessary to ensure patent airway. 5.2 Urinary Retention. The use of Solifenacin Succinate Tablets, like other antimuscarinic drugs, in patients with clinically significant bladder outlet obstruction including patients with urinary retention, may result in further urinary retention and kidney injury. The use of Solifenacin Succinate Tablets is not recommended in patients with clinically significant bladder outlet obstruction and is contraindicated in patients with urinary retention [see Contraindications (4)] . 5.3 Gastrointestinal Disorders. The use of Solifenacin Succinate Tablets, like other antimuscarinic drugs, in patients with conditions associated with decreased gastrointestinal motility may result in further decreased gastrointestinal motility. Solifenacin Succinate Tablets are contraindicated in patients with gastric retention [see Contraindications (4)] The use of Solifenacin Succinate Tablets is not recommended in patients with conditions associated with decreased gastrointestinal motility. 5.4 Central Nervous System Effects. Solifenacin Succinate Tablets are associated with antimuscarinic central nervous system (CNS) adverse reactions [see Adverse Reactions (6.2)]. variety of CNS antimuscarinic adverse reactions have been reported, including headache, confusion, hallucinations, and somnolence. Monitor patients for signs of antimuscarinic CNS adverse reactions, particularly after beginning treatment or increasing the dose. Advise patients not to drive or operate heavy machinery until they know how Solifenacin Succinate Tablets affect them. If patient experiences antimuscarinic CNS adverse reactions, consider dose reduction or drug discontinuation. 5.5 Controlled Narrow-Angle Glaucoma. Solifenacin Succinate Tablets should be used with caution in patients being treated for narrow-angle glaucoma [see Contraindications (4)]. 5.6 QT Prolongation in Patients at High Risk of QT Prolongation. In study of the effect of solifenacin succinate on the QT interval conducted in 76 healthy women [see Clinical Pharmacology (12.2)] solifenacin succinate 30 mg (three times the largest maximum recommended dose in adultpatients) was associated with mean increase in the Fridericia-corrected QT interval of msec (90% CI, 4, 13). The QTprolonging effect appeared less with solifenacin succinate 10 mg than with solifenacin succinate 30 mg, and the effect ofsolifenacin succinate 30 mg did not appear as large as that of the positive control moxifloxacin at its therapeutic dose. The use of Solifenacin Succinate Tablets is not recommended in patients at high risk of QT prolongation, including patients with known history of QT prolongation and patients who are taking medications known to prolong the QT interval.