Revefenacin

1 INDICATIONS AND USAGE YUPELRI is indicated for the maintenance treatment of patients with chronic obstructive pulmonary disease (COPD). YUPELRI is an anticholinergic indicated for the maintenance treatment of patients with chronic obstructive pulmonary disease (COPD) .

2 DOSAGE AND ADMINISTRATION The recommended dosage is 175 mcg YUPELRI (one 175 mcg unit‑dose vial) administered by oral inhalation once daily by nebulizer using a mouthpiece. Administration Overview YUPELRI should be administered by the orally inhaled route via a standard jet nebulizer connected to an air compressor (See Instructions for Use) . The safety and efficacy of YUPELRI have been established in clinical trials when administered using the PARI LC ® Sprint nebulizer with a mouthpiece and the PARI Trek ® S compressor. The safety and efficacy of YUPELRI delivered from non‑compressor based nebulizer systems have not been established. The YUPELRI unit-dose vial should only be removed from the foil pouch and opened IMMEDIATELY BEFORE USE. The vial and any residual content should be discarded after use. No dosage adjustment is required for geriatric patients, or patients with renal impairment [see Use in Specific Populations (8.5 , 8.7) and Clinical Pharmacology (12.3) ] . The drug compatibility (physical and chemical), efficacy, and safety of YUPELRI when mixed with other drugs in a nebulizer have not been established. For oral inhalation use only. Do not swallow YUPELRI. • One 175 mcg vial (3 mL) once daily. ( 2 ) • For use with a standard jet nebulizer with a mouthpiece connected to an air compressor. ( 2 )

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in labeling: • Paradoxical bronchospasm [see Warnings and Precautions (5.2) ] • Worsening of narrow-angle glaucoma [see Warnings and Precautions (5.3) ] • Worsening of urinary retention [see Warnings and Precautions (5.4) ] • Immediate hypersensitivity reactions [ see Warnings and Precautions (5.5) ] Most common adverse reactions (incidence greater than or equal to 2% and more common than placebo) include cough, nasopharyngitis, upper respiratory tract infection, headache, and back pain. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Mylan at 1-877-446-3679 (1-877-4-INFO-RX) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trial 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. The YUPELRI safety database included 2,285 subjects with COPD in two 12-week efficacy studies and one 52-week long-term safety study. A total of 730 subjects received treatment with YUPELRI 175 mcg once daily. The safety data described below are based on the two 12-week trials and the one 52-week trial. 12-Week Trials YUPELRI was studied in two 12-week replicate placebo-controlled trials in patients with moderate to very severe COPD (Trials 1 and 2). In these trials, 395 patients were treated with YUPELRI at the recommended dose of 175 mcg once daily. The population had a mean age of 64 years (range from 41 to 88 years), with 50% males, 90% Caucasian, and had COPD with a mean post-bronchodilator forced expiratory volume in one second (FEV 1 ) percent predicted of 55%. Of subjects enrolled in the two 12-week trials, 37% were taking concurrent LABA or ICS/LABA therapy. Patients with unstable cardiac disease, narrow-angle glaucoma, or symptomatic prostatic hypertrophy or bladder outlet obstruction were excluded from these trials. Table 1 shows the most common adverse reactions that occurred with a frequency of greater than or equal to 2% in the YUPELRI group and higher than placebo in the two 12‑week placebo-controlled trials. The proportion of subjects who discontinued treatment due to adverse reactions was 13% for the YUPELRI-treated subjects and 19% for placebo-treated subjects. Table 1: Adverse Reactions with YUPELRI ≥2% Incidence and Higher than Placebo Adverse Reaction Placebo (N = 418) YUPELRI 175 mcg (N = 395) Respiratory, Thoracic and Mediastinal Disorders Cough 17 (4%) 17 (4%) Infections and Infestations Nasopharyngitis 9 (2%) 15 (4%) Upper respiratory tract infection 9 (2%) 11 (3%) Nervous System Disorders Headache 11 (3%) 16 (4%) Musculoskeletal and Connective Tissue Disorders Back pain 3 (1%) 9 (2%) Other adverse reactions defined as events with an incidence of ≥1.0%, less than 2.0%, and more common than with placebo included the following: hypertension, dizziness, oropharyngeal pain, and bronchitis. 52-Week Trial YUPELRI was studied in one 52-week, open-label, active-control (tiotropium 18 mcg once daily) trial in 1,055 patients with COPD. In this trial, 335 patients were treated with YUPELRI 175 mcg once daily and 356 patients with tiotropium. The demographic and baseline characteristics of the long-term safety trial were similar to those of the placebo-controlled 12-week studies described, with the exception that concurrent LABA or LABA/ICS therapy was used in 50% of patients. The adverse reactions reported in the long-term safety trial for YUPELRI were consistent with those observed in the placebo-controlled studies of 12-weeks. 6.2 Postmarketing Experience The following adverse reaction has been reported during post-approval use of YUPELRI. Because this reaction was reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate the frequency or establish a causal relationship to drug exposure. Gastrointestinal Disorders : Dry mouth

12.3 Pharmacokinetics Revefenacin pharmacokinetic parameters are presented as the mean [standard deviation (SD)] unless otherwise specified. Following repeat dosing of inhaled YUPELRI, steady-state was achieved within 7 days with <1.6‑fold accumulation. Revefenacin exposure (C max and AUC) in COPD patients is approximately 60% lower as compared to healthy subjects. Exposure (C max and AUC) of the active metabolite in COPD patients is approximately 2-fold higher as compared to healthy subjects. Revefenacin C max was 0.16 ng/mL (0.11) and AUC was 0.22 ng·hr/mL (0.20) at steady-state after inhaled YUPELRI 175 mcg dose in COPD patients. C max of the active metabolite was 0.20 ng/mL (0.13) and AUC was 0.69 ng·hr/mL (0.53) at steady-state after inhaled YUPELRI 175 mcg dose in COPD patients. Revefenacin and its active metabolite exposure increased in a slightly greater than dose proportional manner with increasing revefenacin dose. After single or multiple once-daily dosing of YUPELRI, both AUC and C max of revefenacin and its active metabolite increased by approximately 11-fold over the 88 to 700 mcg (8‑fold) dose range. Absorption Following inhaled administration of YUPELRI in healthy subjects or COPD patients, C max of revefenacin and its active metabolite occurred at the first postdose sampling time which ranged from 14 to 41 minutes after start of nebulization. The absolute bioavailability following an oral dose of revefenacin is low (<3%). Distribution Following intravenous administration to healthy subjects, the mean steady-state volume of distribution of revefenacin was 218 L suggesting extensive distribution to tissues. In vitro protein binding of revefenacin and its active metabolite in human plasma was on average 71% and 42%, respectively. Elimination The terminal half-life of revefenacin and its active metabolite after once-daily dosing of YUPELRI in COPD patients is 22 to 70 hours. Metabolism In vitro and in vivo data showed that revefenacin is primarily metabolized via hydrolysis of the primary amide to a carboxylic acid forming its major active metabolite. Following inhaled administration of YUPELRI in COPD patients, conversion to its active metabolite occurred rapidly, and plasma exposures of the active metabolite exceeded those of revefenacin by approximately 4- to 6-fold (based on AUC). The active metabolite is formed by hepatic metabolism and possesses activity at target muscarinic receptors that is lower (approximately one-third to one-tenth) than that of revefenacin. It could potentially contribute to systemic antimuscarinic effects at therapeutic doses. Excretion Following administration of a single intravenous dose of radiolabeled revefenacin to healthy male subjects, approximately 54% of total radioactivity was recovered in the feces and 27% was excreted in the urine. Approximately 19% of the administered radioactive dose was recovered in the feces as the active metabolite. Following administration of a single radiolabeled oral dose of revefenacin, 88% of total radioactivity was recovered in the feces and <5% was present in urine, suggesting low oral absorption. There was minimal renal excretion (<1%) of revefenacin and its active metabolite following inhaled administration of YUPELRI in COPD patients. Specific Populations Population pharmacokinetic analysis showed no evidence of a clinically significant effect of age (44 to 79 years), gender (59% male), smoking status (42% current smoker), or weight (46 to 155 kg) on systemic exposure of revefenacin and its active metabolite. Patients with Hepatic Impairment The pharmacokinetics of YUPELRI was evaluated in subjects with moderate hepatic impairment (Child-Pugh score of 7-9). There was no increase in C max of revefenacin and 1.5-fold increase in C max of the active metabolite. There was 1.2-fold increase in AUC of revefenacin and up to 4.7-fold increase in AUC of the active metabolite. YUPELRI has not been evaluated in subjects with severe hepatic impairment. Patients with Renal Impairment The pharmacokinetics of YUPELRI was evaluated in subjects with severe renal impairment (CrCl <30 mL/min). There was 1.5-fold increase in C max of revefenacin and up to 2-fold increase in C max of the active metabolite. There was up to 2.3‑fold increase in AUC inf of revefenacin; the active metabolite exposure (AUC inf ) was increased by up to 2.5-fold. YUPELRI has not been evaluated in subjects with end-stage renal disease. Drug Interaction Studies Revefenacin and Cytochrome P450 Neither revefenacin nor its active metabolite inhibits the following cytochrome P450 isoforms: CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, and CYP3A4/5. Neither revefenacin nor its active metabolite induces CYP1A2, CYP2B6, and CYP3A4/5. Revefenacin and Efflux Transporters Revefenacin is a substrate of P-gp and BCRP. Neither revefenacin nor its active metabolite is an inhibitor of these efflux transporters. Revefenacin and Uptake Transporters The active metabolite of revefenacin is a substrate of OATP1B1 and OATP1B3. Neither revefenacin nor its active metabolite is an inhibitor of the uptake transporters OATP1B1, OATP1B3, OAT1, OAT3, or OCT2.