Toviaz fesoterodine fumarate 8 mg Tablet, Film Coated, Extended Release, 30-count

5 WARNINGS AND PRECAUTIONS • Angioedema : Promptly discontinue Toviaz and provide appropriate therapy. ( 5.1 ) • Urinary Retention : Toviaz is not recommended in patients with clinically significant bladder outlet obstruction because of the risk of urinary retention. ( 5.2 ) • Decreased Gastrointestinal Motility : Toviaz is not recommended for use in patients with decreased gastrointestinal motility, such as those with severe constipation.

( 5.3 ) • Worsening of Narrow-Angle Glaucoma : Use Toviaz with caution in patients being treated for narrow-angle glaucoma. ( 5.4 ) • Central Nervous System Effects : Somnolence has been reported with Toviaz. Advise patients not to drive or operate heavy machinery until they know how Toviaz affects them.

( 5.5 ) • Worsening of Myasthenia Gravis Symptoms : Use Toviaz with caution in patients with myasthenia gravis. ( 5.6 )

5.1Angioedema Angioedema of the face, lips, tongue, and/or larynx has been reported with Toviaz. 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. Angioedema associated with upper airway swelling may be life-threatening.

Toviaz is contraindicated in patients with a known or suspected hypersensitivity to Toviaz or any of its ingredients [see Contraindications (4) ]. If involvement of the tongue, hypopharynx, or larynx occurs, Toviaz should be promptly discontinued and appropriate therapy and/or measures to ensure a patent airway should be promptly provided.

5.2Urinary Retention in Adult Patients With Bladder Outlet Obstruction The use of Toviaz, 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 Toviaz is not recommended in patients with clinically significant bladder outlet obstruction, and is contraindicated in patients with urinary retention [see Contraindications (4) and Adverse Reactions (6.1) ] .

5.3Decreased Gastrointestinal Motility Toviaz is associated with decreased gastric motility. Toviaz is contraindicated in patients with gastric retention [see Contraindications (4) ]. The use of Toviaz is not recommended in patients with decreased gastrointestinal motility, such as those with severe constipation.

5.4Worsening of Narrow-Angle Glaucoma Toviaz can worsen controlled narrow-angle glaucoma. Toviaz is contraindicated in patients with uncontrolled narrow-angle glaucoma [see Contraindications (4) ]. Toviaz should be used with caution in patients being treated for narrow-angle glaucoma.

5.5Central Nervous System Effects Toviaz is associated with anticholinergic central nervous system (CNS) adverse reactions [see Adverse Reactions (6.1) ] . A variety of CNS anticholinergic effects have been reported, including headache, 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 they know how Toviaz affects them. If a patient experiences anticholinergic CNS effects, Toviaz dose reduction or discontinuation should be considered.

5.6Worsening of Myasthenia Gravis Symptoms Toviaz should be used with caution in patients with myasthenia gravis due to the risk of worsening of symptoms of the disease.

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in labeling: • Angioedema [see Warnings and Precautions (5.1) ] • Urinary Retention [see Warnings and Precautions (5.2) ] • Decreased Gastrointestinal Motility [see Warnings and Precautions (5.3) ] • Most frequently reported adverse events with Toviaz in adult patients with OAB (≥4%) were: dry mouth (placebo, 7%; Toviaz 4 mg, 19%; Toviaz 8 mg, 35%) and constipation (placebo, 2%; Toviaz 4 mg, 4%; Toviaz 8 mg, 6%). ( 6.1 ) • Most frequently reported adverse reactions with Toviaz in pediatric patients (≥2%) with NDO were: diarrhea, urinary tract infection (UTI), dry mouth, constipation, abdominal pain, nausea, weight increased, and headache.

( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Pfizer Inc. at 1-800-438-1985 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .

6.1Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Adult Overactive Bladder (OAB) The safety of Toviaz was evaluated in Phase 2 and 3 controlled trials in a total of 2859 patients with overactive bladder, of which 2288 were treated with Toviaz. Of this total, 782 received Toviaz 4 mg/day, and 785 received Toviaz 8 mg/day with treatment periods of 8- or 12-weeks.

Approximately 80% of these patients had greater than 10-weeks of exposure to Toviaz in these trials. A total of 1964 patients participated in two 12-week, Phase 3 efficacy and safety studies and subsequent open-label extension studies. In these two studies combined, 554 patients received Toviaz 4 mg/day and 566 patients received Toviaz 8 mg/day.

In Phase 2 and 3 placebo-controlled trials combined, the incidences of serious adverse events in patients receiving placebo, Toviaz 4 mg, and Toviaz 8 mg were 1.9%, 3.5%, and 2.9%, respectively. All serious adverse events were judged to be not related or unlikely to be related to study medication by the investigator, except for four patients receiving Toviaz who reported one serious adverse reaction each: angina, chest pain, gastroenteritis, and QT prolongation on ECG. The most commonly reported adverse event in patients treated with Toviaz was dry mouth.

The incidence of dry mouth was higher in those taking 8 mg/day (35%) and in those taking 4 mg/day (19%), as compared to placebo (7%). Dry mouth led to discontinuation in 0.4%, 0.4%, and 0.8% of patients receiving placebo, Toviaz 4 mg, and Toviaz 8 mg, respectively. For those patients who reported dry mouth, most had their first occurrence of the event within the first month of treatment.

The second most commonly reported adverse event was constipation. The incidence of constipation was 2% in those taking placebo, 4% in those taking 4 mg/day, and 6% in those taking 8 mg/day. Table 4 lists adverse events, regardless of causality, that were reported in the combined Phase 3, randomized, placebo-controlled trials at an incidence greater than placebo and in 1% or more of patients treated with Toviaz 4 mg or 8 mg once daily for up to 12-weeks.

Table 4: Adverse Events With an Incidence Exceeding the Placebo Rate and Reported by ≥1% of Patients From Double-Blind, Placebo-Controlled Phase 3 Trials of 12-Weeks Treatment Duration System organ class/Preferred term Placebo N=554 % Toviaz 4 mg/day N=554 % Toviaz 8 mg/day N=566 % ALT = alanine aminotransferase; GGT = gamma glutamyltransferase Gastrointestinal disorders Dry mouth 7.0 18.8

34.6Constipation 2.0 4.2

6.0Dyspepsia 0.5 1.6

2.3Nausea 1.3 0.7

1.9Abdominal pain upper 0.5 1.1

0.5Infections Urinary tract infection 3.1 3.2

4.2Upper respiratory tract infection 2.2 2.5

1.8Eye disorders Dry eyes 0 1.4

3.7Renal and urinary disorders Dysuria 0.7 1.3

1.6Urinary retention 0.2 1.1

1.4Respiratory disorders Cough 0.5 1.6

0.9 Dry throa…

7 DRUG INTERACTIONS

7.1Antimuscarinic Drugs Coadministration of Toviaz with other antimuscarinic agents that produce dry mouth, constipation, urinary retention, and other anticholinergic pharmacological effects may increase the frequency and/or severity of such effects. Anticholinergic agents may potentially alter the absorption of some concomitantly administered drugs due to anticholinergic effects on gastrointestinal motility.

7.2CYP3A4 Inhibitors Doses of Toviaz greater than 4 mg are not recommended in adult patients taking strong CYP3A4 inhibitors, such as ketoconazole, itraconazole, and clarithromycin [see Dosage and Administration (2.5) ]. The Toviaz dose in pediatric patients taking strong CYP3A4 inhibitors is recommended to be reduced to 4 mg once daily in patients >35 kg and is not recommended in patients weighing greater than 25 kg and up to 35 kg [see Dosage and Administration (2.5) ]. In a study in adults, coadministration of the strong CYP3A4 inhibitor ketoconazole with fesoterodine led to approximately a doubling of the maximum concentration (C max ) and area under the concentration versus time curve (AUC) of 5-hydroxymethyl tolterodine (5-HMT), the active metabolite of fesoterodine.

Compared with CYP2D6 extensive metabolizers not taking ketoconazole, further increases in the exposure to 5-HMT were observed in subjects who were CYP2D6 poor metabolizers taking ketoconazole [see Clinical Pharmacology (12.3) ]. There is no clinically relevant effect of moderate CYP3A4 inhibitors on the pharmacokinetics of fesoterodine. Following blockade of CYP3A4 by coadministration of the moderate CYP3A4 inhibitor fluconazole 200 mg twice a day for 2 days, the average (90% confidence interval) increase in C max and AUC of the active metabolite of fesoterodine was approximately 19% (11%–28%) and 27% (18%–36%) respectively.

No dosing adjustments are recommended in the presence of moderate CYP3A4 inhibitors (e.g., erythromycin, fluconazole, diltiazem, verapamil and grapefruit juice). The effect of weak CYP3A4 inhibitors (e.g. cimetidine) was not examined; it is not expected to be in excess of the effect of moderate inhibitors [see Clinical Pharmacology (12.3) ] .

7.3CYP3A4 Inducers No dosing adjustments are recommended in the presence of CYP3A4 inducers, such as rifampin and carbamazepine. Following induction of CYP3A4 by coadministration of rifampin 600 mg once a day, C max and AUC of the active metabolite of fesoterodine decreased by approximately 70% and 75%, respectively, after oral administration of Toviaz 8 mg. The terminal half-life of the active metabolite was not changed.

7.4CYP2D6 Inhibitors The interaction with CYP2D6 inhibitors was not tested clinically. In poor metabolizers for CYP2D6, representing a maximum CYP2D6 inhibition, C max and AUC of the active metabolite are increased 1.7- and 2-fold, respectively. No dosing adjustments are recommended in the presence of CYP2D6 inhibitors.

7.5Drugs Metabolized by Cytochrome P450 In vitro data indicate that at therapeutic concentrations, the active metabolite of fesoterodine does not have the potential to inhibit or induce Cytochrome P450 enzyme systems [see Clinical Pharmacology (12.3) ] .

7.6Oral Contraceptives In the presence of fesoterodine, there are no clinically significant changes in the plasma concentrations of combined oral contraceptives containing ethinyl estradiol and levonorgestrel [see Clinical Pharmacology (12.3) ] .

7.7Warfarin A clinical study has shown that fesoterodine 8 mg once daily has no significant effect on the pharmacokinetics or the anticoagulant activity (PT/INR) of warfarin 25 mg. Standard therapeutic monitoring for warfarin should be continued [see Clinical Pharmacology (12.3) ] .

7.8Drug-Laboratory Test Interactions Interactions between Toviaz and laboratory tests have not been studied.