Tiotropium Bromide

1 INDICATIONS AND USAGE Tiotropium bromide inhalation powder is indicated for the long-term, once-daily, maintenance treatment of bronchospasm associated with chronic obstructive pulmonary disease (COPD), including chronic bronchitis and emphysema. Tiotropium bromide inhalation powder is indicated to reduce exacerbations in COPD patients. Tiotropium bromide inhalation powder is an anticholinergic indicated for the long-term, once-daily, maintenance treatment of bronchospasm associated with chronic obstructive pulmonary disease (COPD), and for reducing COPD exacerbations ( 1 )

2 DOSAGE AND ADMINISTRATION For oral inhalation only. Do not swallow tiotropium bromide inhalation powder capsules, as the intended effects on the lungs will not be obtained. The contents of the tiotropium bromide inhalation powder capsules should only be used with the LupinHaler ® device [see Overdosage ( 10 )] . The recommended dosage of tiotropium bromide inhalation powder is two inhalations of the powder contents of one tiotropium bromide inhalation powder capsule, once-daily, with the LupinHaler device [see Patient Counseling Information ( 17 )]. Do not take more than one dose in 24 hours. For administration of tiotropium bromide inhalation powder, a tiotropium bromide inhalation powder capsule is placed into the center chamber of the LupinHaler device. The tiotropium bromide inhalation powder capsule is pierced by pressing and releasing the green piercing button on the side of the LupinHaler device. The tiotropium formulation is dispersed into the air stream when the patient inhales through the mouthpiece [see Patient Counseling Information ( 17 )]. No dosage adjustment is required for geriatric, hepatically-impaired, or renally-impaired patients. However, patients with moderate to severe renal impairment given tiotropium bromide inhalation powder should be monitored closely for anticholinergic effects [see Warnings and Precautions ( 5.6 ), Use in Specific Populations ( 8.5 , 8.6 , 8.7 ), and Clinical Pharmacology ( 12.3 )]. For oral inhalation only. DO NOT swallow tiotropium bromide inhalation powder capsules. Only use tiotropium bromide inhalation powder capsules with the LupinHaler ® device ( 2 ) Two inhalations of the powder contents of a single tiotropium bromide inhalation powder capsule (18 mcg) once daily ( 2 )

6 ADVERSE REACTIONS The following adverse reactions are described, or described in greater detail, in other sections: Immediate hypersensitivity reactions [see Warnings and Precautions ( 5.2 )] Paradoxical bronchospasm [see Warnings and Precautions ( 5.3 )] Worsening of narrow-angle glaucoma [see Warnings and Precautions ( 5.4 )] Worsening of urinary retention [see Warnings and Precautions ( 5.5 )] The most common adverse reactions (>5% incidence in the 1-year placebo- controlled trials) were upper respiratory tract infection, dry mouth, sinusitis, pharyngitis, non-specific chest pain, urinary tract infection, dyspepsia, and rhinitis ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Lupin Pharmaceuticals, Inc. at 1-800-399-2561 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, the incidence of adverse reactions observed in the clinical trials of a drug cannot be directly compared to the incidences in the clinical trials of another drug and may not reflect the incidences observed in practice. 6-Month to 1-Year Trials The data described below reflect exposure to tiotropium bromide inhalation powder in 2,663 patients. Tiotropium bromide inhalation powder was studied in two 1-year placebo-controlled trials, two 1-year active-controlled trials, and two 6-month placebo-controlled trials in patients with COPD. In these trials, 1,308 patients were treated with tiotropium bromide inhalation powder at the recommended dosage of 18 mcg once a day. The population had an age ranging from 39 to 87 years with 65% to 85% males, 95% Caucasian, and had COPD with a mean pre-bronchodilator forced expiratory volume in one second (FEV 1 ) percent predicted of 39% to 43%. Patients with narrow-angle glaucoma, or symptomatic prostatic hypertrophy or bladder outlet obstruction were excluded from these trials. An additional 6-month trial conducted in a Veteran's Affairs setting is not included in this safety database because only serious adverse events were collected. The most commonly reported adverse drug reaction was dry mouth. Dry mouth was usually mild and often resolved during continued treatment. Other reactions reported in individual patients and consistent with possible anticholinergic effects included constipation, tachycardia, blurred vision, glaucoma (new onset or worsening), dysuria, and urinary retention. Four multicenter, 1-year, placebo-controlled and active-controlled trials evaluated tiotropium bromide inhalation powder in patients with COPD. Table 1 shows all adverse reactions that occurred with a frequency of ≥3% in the tiotropium bromide inhalation powder group in the 1-year placebo-controlled trials where the rates in the tiotropium bromide inhalation powder group exceeded placebo by ≥1%. The frequency of corresponding reactions in the ipratropium-controlled trials is included for comparison. Table 1: Adverse Reactions (% Patients) in One-Year COPD Clinical Trials Body System (Event) Placebo-Controlled Trials Ipratropium-Controlled Trials Tiotropium Bromide Inhalation Powder (n = 550) Placebo (n = 371) Tiotropium Bromide Inhalation Powder (n = 356) Ipratropium (n = 179) Body as a Whole Chest Pain (non-specific) 7 5 5 2 Edema, Dependent 5 4 3 5 Gastrointestinal System Disorders Dry Mouth 16 3 12 6 Dyspepsia 6 5 1 1 Abdominal Pain 5 3 6 6 Constipation 4 2 1 1 Vomiting 4 2 1 2 Musculoskeletal System Myalgia 4 3 4 3 Resistance Mechanism Disorders Infection 4 3 1 3 Moniliasis 4 2 3 2 Respiratory System (Upper) Upper Respiratory Tract Infection 41 37 43 35 Sinusitis 11 9 3 2 Pharyngitis 9 7 7 3 Rhinitis 6 5 3 2 Epistaxis 4 2 1 1 Skin and Appendage Disorders Rash 4 2 2 2 Urinary System Urinary Tract Infection 7 5 4 2 Arthritis, coughing, and influenza-like symptoms occurred at a rate of ≥3% in the tiotropium bromide inhalation powder treatment group, but were <1% in excess of the placebo group. Other reactions that occurred in the tiotropium bromide inhalation powder group at a frequency of 1% to 3% in the placebo-controlled trials where the rates exceeded that in the placebo group include: Body as a Whole : allergic reaction, leg pain; Central and Peripheral Nervous System : dysphonia, paresthesia; Gastrointestinal System Disorders : gastrointestinal disorder not otherwise specified (NOS), gastroesophageal reflux, stomatitis (including ulcerative stomatitis); Metabolic and Nutritional Disorders : hypercholesterolemia, hyperglycemia; Musculoskeletal System Disorders : skeletal pain; Cardiac Events : angina pectoris (including aggravated angina pectoris); Psychiatric Disorder : depression; Infections : herpes zoster; Respiratory System Disorder (Upper): laryngitis; Vision Disorder : cataract. In addition, among the adverse reactions observed in the clinical trials with an incidence of <1% were atrial fibrillation, supraventricular tachycardia, angioedema, and urinary retention. In the 1-year trials, the incidence of dry mouth, constipation, and urinary tract infection increased with age [see Use in Specific Populations ( 8.5 )]. Two multicenter, 6-month, controlled studies evaluated tiotropium bromide inhalation powder in patients with COPD. The adverse reactions and the incidence rates were similar to those seen in the 1-year controlled trials. 4-Year Trial The data described below reflect exposure to tiotropium bromide inhalation powder in 5,992 COPD patients in a 4-year placebo-controlled trial. In this trial, 2,986 patients were treated with tiotropium bromide inhalation powder at the recommended dosage of 18 mcg once a day. The population had an age range from 40 to 88 years, was 75% male, 90% Caucasian, and had COPD with a mean pre-bronchodilator FEV 1 percent predicted of 40%. Patients with narrow-angle glaucoma, or symptomatic prostatic hypertrophy or bladder outlet obstruction were excluded from these trials. When the adverse reactions were analyzed with a frequency of ≥3% in the tiotropium bromide inhalation powder group where the rates in the tiotropium bromide inhalation powder group exceeded placebo by ≥1%, adverse reactions included (tiotropium bromide inhalation powder, placebo): pharyngitis (12.5%, 10.8%), sinusitis (6.5%, 5.3%), headache (5.7%, 4.5%), constipation (5.1%, 3.7%), dry mouth (5.1%, 2.7%), depression (4.4%, 3.3%), insomnia (4.4%, 3.0%), and arthralgia (4.2%, 3.1%). Additional Adverse Reactions Other adverse reactions not previously listed that were reported more frequently in COPD patients treated with tiotropium bromide inhalation powder than placebo include: dehydration, skin ulcer, stomatitis, gingivitis, oropharyngeal candidiasis, dry skin, skin infection, and joint swelling. 6.2 Postmarketing Experience Adverse reactions have been identified during worldwide post-approval use of tiotropium bromide inhalation powder. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. These adverse reactions are: application site irritation (glossitis, mouth ulceration, and pharyngolaryngeal pain), dizziness, dysphagia, hoarseness, intestinal obstruction including ileus paralytic, intraocular pressure increased, oral candidiasis, palpitations, pruritus, tachycardia, throat irritation, and urticaria.

12.3 Pharmacokinetics Tiotropium is administered by dry powder inhalation. Some of the pharmacokinetic data described below were obtained with higher doses than recommended for therapy. A dedicated pharmacokinetic study in patients with COPD evaluating once-daily tiotropium delivered from the RESPIMAT inhaler (5 mcg) and as inhalation powder (18 mcg) from the LupinHaler device resulted in a similar systemic exposure between the two products. Absorption Following dry powder inhalation by young healthy volunteers, the absolute bioavailability of 19.5% suggests that the fraction reaching the lung is highly bioavailable. Oral solutions of tiotropium have an absolute bioavailability of 2-3%. Food is not expected to influence the absorption of tiotropium. Maximum tiotropium plasma concentrations were observed 7 minutes after inhalation. Distribution Tiotropium is 72% bound to plasma protein and had a volume of distribution of 32 L/kg after intravenous administration to young healthy volunteers. Local concentrations in the lung are not known, but the mode of administration suggests substantially higher concentrations in the lung. Studies in rats have shown that tiotropium does not readily penetrate the blood-brain barrier. Elimination The terminal half-life of tiotropium in COPD patients following once daily inhalation of 5 mcg tiotropium was approximately 25 hours. Total clearance was 880 mL/min after intravenous administration in young healthy volunteers. After chronic once-daily dry powder inhalation by COPD patients, pharmacokinetic steady state was reached by day 7 with no accumulation thereafter. Metabolism The extent of metabolism is small. This is evident from a urinary excretion of 74% of unchanged substance after an intravenous dose to young healthy volunteers. Tiotropium, an ester, is nonenzymatically cleaved to the alcohol N-methylscopine and dithienylglycolic acid, neither of which binds to muscarinic receptors. In vitro experiments with human liver microsomes and human hepatocytes suggest that a fraction of the administered dose (74% of an intravenous dose is excreted unchanged in the urine, leaving 25% for metabolism) is metabolized by cytochrome P450-dependent oxidation and subsequent glutathione conjugation to a variety of Phase II metabolites. This enzymatic pathway can be inhibited by CYP450 2D6 and 3A4 inhibitors, such as quinidine, ketoconazole, and gestodene. Thus, CYP450 2D6 and 3A4 are involved in the metabolic pathway that is responsible for the elimination of a small part of the administered dose. In vitro studies using human liver microsomes showed that tiotropium in supra-therapeutic concentrations did not inhibit CYP450 1A1, 1A2, 2B6, 2C9, 2C19, 2D6, 2E1, or 3A4. Excretion Intravenously administered tiotropium bromide is mainly excreted unchanged in urine (74%). After dry powder inhalation to COPD patients at steady state, urinary excretion was 7% (1.3 mcg) of the unchanged dose over 24 hours. The renal clearance of tiotropium exceeds the creatinine clearance, indicating secretion into the urine. Specific Populations Geriatric Patients As expected for all predominantly renally excreted drugs, advancing age was associated with a decrease of tiotropium renal clearance (365 mL/min in COPD patients <65 years to 271 mL/min in COPD patients ≥65 years). This did not result in a corresponding increase in AUC 0-6,ss and C max,ss values following administration via LupinHaler device. Renal Impairment Following 4-week tiotropium bromide inhalation powder or SPIRIVA RESPIMAT ® once daily dosing in patients with COPD, mild renal impairment (creatinine clearance 60-<90 mL/min) resulted in 6-23% higher AUC 0-6,ss and 6-17% higher C max,ss values; moderate renal impairment (creatinine clearance 30-<60 mL/min) resulted in 54-57% higher AUC 0-6,ss and 15-31% higher C max,ss values compared to COPD patients with normal renal function (creatinine clearance ≥90 mL/min). There is insufficient data for tiotropium exposure in patients with severe renal impairment (creatinine clearance <30 mL/min) following inhalation of tiotropium bromide inhalation powder or SPIRIVA RESPIMAT ® . However AUC 0-4 and C max were 94% and 52% higher, respectively, in patients with severe renal impairment following intravenous infusion of tiotropium bromide. Hepatic Impairment The effects of hepatic impairment on the pharmacokinetics of tiotropium were not studied. Drug Interactions An interaction study with tiotropium (14.4 mcg intravenous infusion over 15 minutes) and cimetidine 400 mg three times daily or ranitidine 300 mg once daily was conducted. Concomitant administration of cimetidine with tiotropium resulted in a 20% increase in the AUC 0-4h , a 28% decrease in the renal clearance of tiotropium and no significant change in the C max and amount excreted in urine over 96 hours. Co-administration of tiotropium with ranitidine did not affect the pharmacokinetics of tiotropium. Common concomitant medications (long-acting beta 2 -adrenergic agonists (LABA), inhaled corticosteroids (ICS)) used by patients with COPD were not found to alter the exposure to tiotropium.