DETROL LA Capsules contain tolterodine tartrate. The active moiety, tolterodine, is a muscarinic receptor antagonist. The chemical name of tolterodine tartrate is (R)-N,N-diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenylpropanamine L-hydrogen tartrate. The empirical formula of tolterodine tartrate is C 26 H 37 NO 7 . Its structure is: Tolterodine tartrate is a white, crystalline powder with a molecular weight of 475.6. The pK a value is 9.87 and the solubility in water is 12 mg/mL. It is soluble in methanol, slightly soluble in ethanol, and practically insoluble in toluene. The partition coefficient (Log D) between n-octanol and water is 1.83 at pH 7.3. DETROL LA 4 mg capsule for oral administration contains 4 mg of tolterodine tartrate. Inactive ingredients are sucrose, starch, hypromellose, ethylcellulose, medium chain triglycerides, oleic acid, gelatin, and FD&C Blue #2. DETROL LA 2 mg capsule for oral administration contains 2 mg of tolterodine tartrate, and the following inactive ingredients: sucrose, starch, hypromellose, ethylcellulose, medium chain triglycerides, oleic acid, gelatin, yellow iron oxide, and FD&C Blue #2. Both the 2 mg and 4 mg capsule strengths are imprinted with a pharmaceutical grade printing ink that contains shellac glaze, titanium dioxide, propylene glycol, and simethicone. Tolterodine Tartrate Structural Formula

DETROL LA Capsules is indicated for the treatment of overactive bladder with symptoms of urge urinary incontinence, urgency, and frequency . DETROL LA is an antimuscarinic indicated for the treatment of overactive bladder with symptoms of urge urinary incontinence, urgency, and frequency.

The 2 mg capsules are blue-green with symbol and 2 printed in white ink. The 4 mg capsules are blue with symbol and 4 printed in white ink. Capsules: 2 mg and 4 mg

• 4 mg capsules taken orally once daily with water and swallowed whole. • 2 mg capsules taken orally once daily with water and swallowed whole in the presence of: o mild to moderate hepatic impairment (Child-Pugh class A or B) o severe renal impairment [Creatinine Clearance (CCr) 10‑30 mL/min] o drugs that are potent CYP3A4 inhibitors. • DETROL LA is not recommended for use in patients with CCr <10 mL/min. • DETROL LA is not recommended for use in patients with severe hepatic impairment (Child-Pugh Class C)

Dosing Information The recommended dose of DETROL LA Capsules is 4 mg once daily with water and swallowed whole. The dose may be lowered to 2 mg daily based on individual response and tolerability; however, limited efficacy data are available for DETROL LA 2 mg

Dosage Adjustment in Specific Populations For patients with mild to moderate hepatic impairment (Child-Pugh Class A or B) or severe renal impairment (CCr 10-30 mL/min), the recommended dose of DETROL LA is 2 mg once daily. DETROL LA is not recommended for use in patients with severe hepatic impairment (Child-Pugh Class C). Patients with CCr<10 mL/min have not been studied and use of DETROL LA in this population is not recommended

Dosage Adjustment in Presence of Concomitant Drugs For patients who are taking drugs that are potent inhibitors of CYP3A4 [e.g., ketoconazole, clarithromycin, ritonavir], the recommended dose of DETROL LA is 2 mg once daily .

• Anaphylaxis and angioedema requiring hospitalization and emergency medical treatment have occurred with the first or subsequent doses of DETROL LA. • Urinary Retention: use caution in patients with clinically significant bladder outflow obstruction because of the risk of urinary retention. • Gastrointestinal Disorders: use caution in patients with gastrointestinal obstructive disorders or decreased gastrointestinal motility because of the risk of gastric retention. • Controlled Narrow-Angle Glaucoma: use caution in patients being treated for narrow-angle glaucoma. • Central Nervous System Effects: Somnolence has been reported with Detrol LA. Advise patients not to drive or operate heavy machinery until they know how Detrol LA affects them. • Myasthenia Gravis: use caution in patients with myasthenia gravis. • QT Prolongation: consider observations from the thorough QT study in clinical decisions to prescribe DETROL LA to patients with a known history of QT prolongation or to patients who are taking Class IA (e.g., quinidine, procainamide) or Class III (e.g., amiodarone, sotalol) antiarrhythmic medications. 5.1 Angioedema Anaphylaxis and angioedema requiring hospitalization and emergency medical treatment have occurred with the first or subsequent doses of DETROL LA. In the event of difficulty in breathing, upper airway obstruction, or fall in blood pressure, DETROL LA should be discontinued and appropriate therapy promptly provided

Urinary Retention Administer DETROL LA Capsules with caution to patients with clinically significant bladder outflow obstruction because of the risk of urinary retention

Gastrointestinal Disorders Administer DETROL LA with caution in patients with gastrointestinal obstructive disorders because of the risk of gastric retention. DETROL LA, like other antimuscarinic drugs, may decrease gastrointestinal motility and should be used with caution in patients with conditions associated with decreased gastrointestinal motility (e.g., intestinal atony) [ see Contraindications ]

Controlled Narrow-Angle Glaucoma Administer DETROL LA with caution in patients being treated for narrow-angle glaucoma

Central Nervous System Effects Detrol LA is associated with anticholinergic central nervous system (CNS) effects including dizziness and somnolence . Patients should be monitored for signs of anticholinergic CNS effects, particularly after beginning treatment or increasing the dose. Advise patients not to drive or operate heavy machinery until the drug’s effects have been determined. If a patient experiences anticholinergic CNS effects, dose reduction or drug discontinuation should be considered

Hepatic Impairment The clearance of orally administered tolterodine immediate release was substantially lower in cirrhotic patients than in the healthy volunteers. For patients with mild to moderate hepatic impairment (Child-Pugh Class A or B), the recommended dose for DETROL LA is 2 mg once daily. DETROL LA is not recommended for use in patients with severe hepatic impairment (Child-Pugh Class C)

Renal Impairment Renal impairment can significantly alter the disposition of tolterodine and its metabolites. The dose of DETROL LA should be reduced to 2 mg once daily in patients with severe renal impairment (CCr: 10-30 mL/min). Patients with CCr<10 mL/min have not been studied and use of DETROL LA in this population is not recommended

Myasthenia Gravis Administer DETROL LA with caution in patients with myasthenia gravis, a disease characterized by decreased cholinergic activity at the neuromuscular junction

Use in Patients with Congenital or Acquired QT Prolongation In a study of the effect of tolterodine immediate release tablets on the QT interval , the effect on the QT interval appeared greater for 8 mg/day (two times the therapeutic dose) compared to 4 mg/day and was more pronounced in CYP2D6 poor metabolizers (PM) than extensive metabolizers (EMs). The effect of tolterodine 8 mg/day was not as large as that observed after four days of therapeutic dosing with the active control moxifloxacin. However, the confidence intervals overlapped. These observations should be considered in clinical decisions to prescribe DETROL LA to patients with a known history of QT prolongation or to patients who are taking Class IA (e.g., quinidine, procainamide) or Class III (e.g., amiodarone, sotalol) antiarrhythmic medications. There has been no association of Torsade de Pointes in the international post-marketing experience with DETROL or DETROL LA.

• Potent CYP3A4 Inhibitors: Coadministration may increase systemic exposure to DETROL LA. Reduce DETROL LA dose to 2 mg once daily. • Other Anticholinergics (antimuscarinics): Concomitant use with other anticholinergic agents may increase the frequency and/or severity of dry mouth, constipation, blurred vision, and other anticholinergic pharmacological effects

Potent CYP2D6 Inhibitors Fluoxetine, a potent inhibitor of CYP2D6 activity, significantly inhibited the metabolism of tolterodine immediate release in CYP2D6 extensive metabolizers, resulting in a 4.8-fold increase in tolterodine AUC. There was a 52% decrease in C max and a 20% decrease in AUC of 5-hydroxymethyl tolterodine (5-HMT), the pharmacologically active metabolite of tolterodine . The sums of unbound serum concentrations of tolterodine and 5-HMT are only 25% higher during the interaction. No dose adjustment is required when tolterodine and fluoxetine are co-administered

Potent CYP3A4 Inhibitors Ketoconazole (200 mg daily), a potent CYP3A4 inhibitor, increased the mean C max and AUC of tolterodine by 2- and 2.5-fold, respectively, in CYP2D6 poor metabolizers. For patients receiving ketoconazole or other potent CYP3A4 inhibitors such as itraconazole, clarithromycin, or ritonavir, the recommended dose of DETROL LA is 2 mg once daily

Other Interactions No clinically relevant interactions have been observed when tolterodine was co-administered with warfarin, with a combined oral contraceptive drug containing ethinyl estradiol and levonorgestrel, or with diuretics

Other Drugs Metabolized by Cytochrome P450 Isoenzymes In vivo drug-interaction data show that tolterodine immediate release does not result in clinically relevant inhibition of CYP1A2, 2D6, 2C9, 2C19, or 3A4 as evidenced by lack of influence on the marker drugs caffeine, debrisoquine, S-warfarin, and omeprazole

Drug-Laboratory-Test Interactions Interactions between tolterodine and laboratory tests have not been studied

Other Anticholinergics The concomitant use of DETROL LA with other anticholinergic (antimuscarinic) agents may increase the frequency and/or severity of dry mouth, constipation, blurred vision, somnolence, and other anticholinergic pharmacological effects.