XHANCE

Indications and Usage ( 1.2 ) 03/2024

1 INDICATIONS AND USAGE XHANCE is a corticosteroid indicated for the treatment of: Chronic rhinosinusitis with nasal polyps (CRSwNP) in adults. ( 1.1 ) Chronic rhinosinusitis without nasal polyps (CRSsNP) in adults. ( 1.2 ) 1.1 Chronic Rhinosinusitis with Nasal Polyps XHANCE is indicated for the treatment of chronic rhinosinusitis with nasal polyps (CRSwNP) in adults. 1.2 Chronic Rhinosinusitis without Nasal Polyps XHANCE is indicated for the treatment of chronic rhinosinusitis without nasal polyps (CRSsNP) in adults.

2 DOSAGE AND ADMINISTRATION Recommended Dosage : 186 mcg (1 spray per nostril) or 372 mcg (2 sprays per nostril) twice daily. ( 2.1 ) For nasal use only. Shake before use. Prime before initial use. ( 2.2 ) XHANCE is delivered into the nose by actuating the pump spray into one nostril while simultaneously blowing into the mouthpiece of the device. ( 2.2 ) 2.1 Recommended Dosage The recommended dosage of XHANCE is 186 mcg (1 spray per nostril) or 372 mcg (2 sprays per nostril) twice daily (total daily dose of 372 mcg or 744 mcg). The maximum total daily dosage should not exceed 2 sprays in each nostril twice daily (total daily dose of 744 mcg). Patients should use XHANCE at regular intervals since its effectiveness depends on regular use. Individual patients will experience a variable time to onset and different degrees of symptom relief. The safety and efficacy of XHANCE when administered in excess of recommended doses have not been established. 2.2 Administration Information Shake XHANCE before each use. Administer XHANCE by the nasal route only. Avoid spraying directly on the nasal septum. Priming Before initial use, prime XHANCE by first gently shaking and then pressing the bottle 7 times or until a fine mist appears. Direct the spray into the air, away from the face. When XHANCE has not been used for ≥ 7 days, prime the pump again by shaking and releasing 2 sprays into the air, away from the face. Administration Instructions XHANCE is delivered into the nose by actuating the pump spray into one nostril while simultaneously blowing (exhaling) into the mouthpiece of the device. To administer XHANCE, insert the tapered tip of the cone-shaped nosepiece deep into one nostril and form a tight seal between the nosepiece and the nostril. Next, place the flexible mouthpiece into the mouth, bending it as necessary to maintain a tight seal with the nostril. Blow into the mouthpiece, and while continuing to blow, push the bottle up to actuate the spray pump. Continuing to blow through the mouth, but not inhaling or exhaling through the nose, at the time of actuation is important to achieve intended drug deposition. Repeat the process in the other nostril for a full dose [see Instructions for Use ] .

3 DOSAGE FORMS AND STRENGTHS Nasal spray: Each spray delivers 93 mcg of fluticasone propionate. One unit provides 120 metered sprays. Nasal spray: 93 mcg of fluticasone propionate in each spray. ( 3 )

4 CONTRAINDICATIONS XHANCE is contraindicated in patients with hypersensitivity to any of the ingredients [see Warnings and Precautions ( 5.3 ) and Description ( 11 )] . Hypersensitivity to any ingredient in XHANCE. ( 4 )

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: Local Nasal Adverse Reactions: [see Warnings and Precautions ( 5.1 )] Glaucoma and Cataracts [see Warnings and Precautions ( 5.2 )] Hypersensitivity Reactions including Anaphylaxis [see Contraindications ( 4 ) and Warnings and Precautions ( 5.3 )] Immunosuppression and Risk of Infection [see Warnings and Precautions ( 5.4 )] Hypercorticism and Adrenal Suppression [see Warnings and Precautions ( 5.5 )] Reduction in Bone Mineral Density [see Warnings and Precautions ( 5.7 )] Effect on Growth [see Warnings and Precautions ( 5.8 )] CRSwNP: The most common adverse reactions (incidence ≥ 3%) are epistaxis, nasal septal ulceration, nasopharyngitis, nasal mucosal erythema, nasal mucosal ulcerations, nasal congestion, acute sinusitis, nasal septal erythema, headache, and pharyngitis. ( 6.1 ) CRSsNP: The most common adverse reactions (incidence ≥ 3%) are epistaxis, headache, and nasopharyngitis ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact OptiNose US, Inc. at 1-833-678-6673 and safety@optinose.com 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 a drug cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice. Chronic Rhinosinusitis with Nasal Polyps The safety data described below are based on two placebo-controlled clinical trials evaluating doses of a fluticasone propionate nasal spray with an exhalation delivery system from 93 mcg twice daily to 372 mcg twice daily. Both trials were 16-weeks in duration with an additional 8-week open-label extension. The trials included a total of 643 adult patients with bilateral nasal polyps and associated moderate or severe nasal congestion of which 161 received 93 mcg twice daily, 160 received 186 mcg twice daily, 161 received 372 mcg twice daily and 161 received placebo. The overall pooled safety data included 296 (46.0%) Female, 347 (54.0%) Male, 584 (90.8%) White, 39 (6.1%) Black, 9 (1.4%) Asian, and 11 (1.7%) patients classified as Other. Of these patients, 45 (7%) were 65 years of age or older. Table 1 displays adverse reactions with an incidence of ≥ 3% in the XHANCE 186 mcg and 372 mcg twice daily patients, and more common than placebo. Table 1. Summary of Adverse Reactions with XHANCE Reported in ≥ 3% of Patients with CRSwNP and More Common Than Placebo in Placebo-Controlled Studies XHANCE Adverse Reaction Placebo (N = 161) n (%) 186 mcg bid* (N = 160) n (%) 372 mcg bid^ (N = 161) n (%) *186 mcg bid = 1 spray per nostril twice daily ^372 mcg bid = 2 sprays per nostril twice daily 1 Includes spontaneous adverse reaction reports 2 Include ulcerations and erosions Epistaxis 1 4 (2.5) 19 (11.9) 16 (9.9) Nasopharyngitis 8 (5.0) 3 (1.9) 12 (7.5) Nasal septal ulceration 2 3 (1.9) 11 (6.9) 12 (7.5) Nasal congestion 6 (3.7) 7 (4.4) 9 (5.6) Acute sinusitis 6 (3.7) 7 (4.4) 8 (5.0) Headache 5 (3.1) 8 (5.0) 6 (3.7) Pharyngitis 2 (1.2) 2 (1.3) 5 (3.1) Nasal mucosal ulceration 2 2 (1.3) 6 (3.8) 4 (2.5) Nasal mucosal erythema 6 (3.7) 9 (5.6) 8 (5.0) Nasal septal erythema 3 (1.9) 6 (3.8) 7 (4.3) Other adverse reactions with XHANCE observed with an incidence < 3% but ≥ 1% and more common than placebo included: nasal dryness, sinusitis, oropharyngeal pain, toothache, intraocular pressure increase, dizziness, abdominal discomfort, and weight increase. 5.0% of patients treated with XHANCE 186 mcg twice daily and 1.2% of patients treated with 372 mcg twice daily discontinued from the clinical trials prior to the open-label extension because of adverse reactions compared to 4.3% of patients treated with placebo. There were no clinically relevant differences in the incidence of adverse reactions based on gender. Clinical trials did not include sufficient numb …

7 DRUG INTERACTIONS Strong cytochrome P450 3A4 inhibitors (e.g., ritonavir, ketoconazole): Use not recommended. May increase risk of systemic corticosteroid effects. ( 7.1 ) 7.1 Inhibitors of Cytochrome P450 3A4 Fluticasone propionate is a substrate of CYP3A4. The use of strong CYP3A4 inhibitors (e.g., ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nefazodone, nelfinavir, saquinavir, ketoconazole, telithromycin, conivaptan, lopinavir, voriconazole) with XHANCE is not recommended because increased systemic corticosteroid adverse effects may occur. Ritonavir A drug interaction trial with fluticasone propionate aqueous nasal spray in healthy subjects has shown that ritonavir (a strong CYP3A4 inhibitor) can significantly increase plasma fluticasone propionate exposure, resulting in significantly reduced serum cortisol concentrations [see Clinical Pharmacology ( 12.3 )] . During postmarketing use, there have been reports of clinically significant drug interactions in patients receiving fluticasone propionate products with ritonavir, resulting in systemic corticosteroid effects including Cushing’s syndrome and adrenal suppression. Ketoconazole Coadministration of orally inhaled fluticasone propionate (1000 mcg) and ketoconazole (200 mg once daily) resulted in a 1.9-fold increase in plasma fluticasone propionate exposure and a 45% decrease in plasma cortisol area under the curve (AUC), but had no effect on urinary excretion of cortisol.

8 USE IN SPECIFIC POPULATIONS Hepatic impairment: Monitor patients for signs of increased drug exposure. ( 8.6 ) 8.1 Pregnancy Risk Summary Available data from published literature on the use of inhaled or nasal fluticasone propionate in pregnant women have not reported a clear association with adverse developmental outcomes. In animals, teratogenicity characteristic of corticosteroids, decreased fetal body weight, and/or skeletal variations in rats, mice, and rabbits were observed with subcutaneously administered maternal toxic doses of fluticasone propionate less than the maximum recommended human daily inhaled dose (MRHDID) on a mcg/m 2 basis. However, fluticasone propionate administered via inhalation to rats decreased fetal body weight, but did not induce teratogenicity at a maternal toxic dose less than the MRHDID on a mcg/m 2 basis ( see Data ). Experience with oral corticosteroids suggests that rodents are more prone to teratogenic effects from corticosteroids than humans. The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated risk of major birth defects and miscarriages in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Data Animal Data In embryofetal development studies with pregnant rats and mice dosed by the subcutaneous route throughout the period of organogenesis, fluticasone propionate was teratogenic in both species. Omphalocele, decreased body weight, and skeletal variations were observed in rat fetuses, in the presence of maternal toxicity, at a dose approximately equivalent to the MRHDID (on a mcg/m 2 basis with a maternal subcutaneous dose of 100 mcg/kg/day). The rat no observed adverse effect level (NOAEL) was observed at approximately 0.4 times the MRHDID (on a mcg/m 2 basis with a maternal subcutaneous dose of 30 mcg/kg/day). Cleft palate and fetal skeletal variations were observed in mouse fetuses at a dose approximately 0.3 times the MRHDID (on a mcg/m 2 basis with a maternal subcutaneous dose of 45 mcg/kg/day). The mouse NOAEL was observed with a dose approximately 0.1 times the MRHDID (on a mcg/m 2 basis with a maternal subcutaneous dose of 15 mcg/kg/day). In an embryofetal development study with pregnant rats dosed by the inhalation route throughout the period of organogenesis, fluticasone propionate produced decreased fetal body weights and skeletal variations, in the presence of maternal toxicity, at a dose approximately 0.34 times the MRHDID (on a mcg/m 2 basis with a maternal inhalation dose of 25.7 mcg/kg/day); however, there was no evidence of teratogenicity. The NOAEL was observed with a dose approximately 0.1 times the MRHDID (on a mcg/m 2 basis with a maternal inhalation dose of 5.5 mcg/kg/day). In an embryofetal development study in pregnant rabbits that were dosed by the subcutaneous route throughout organogenesis, fluticasone propionate produced reductions of fetal body weights, in the presence of maternal toxicity, at doses approximately 0.02 times the MRHDID and higher (on a mcg/m 2 basis with a maternal subcutaneous dose of 0.57 mcg/kg/day). Teratogenicity was evident based upon a finding of cleft palate for 1 fetus at a dose approximately 0.1 times the MRHDID (on a mcg/m 2 basis with a maternal subcutaneous dose of 4 mcg/kg/day). The NOAEL was observed in rabbit fetuses with a dose approximately 0.002 times the MRHDID (on a mcg/m 2 basis with a maternal subcutaneous dose of 0.08 mcg/kg/day). Fluticasone propionate crossed the placenta following subcutaneous administration to mice and rats and oral administration to rabbits. In a pre- and post-natal development study in pregnant rats dosed from late gestation through delivery and lactation (Gestation Day 17 to Postpartum Day 22), fluticasone propionate was not associated with decreases in pup body weight, and had no effe …

12.1 Mechanism of Action Fluticasone propionate is a synthetic trifluorinated corticosteroid with anti-inflammatory activity. Fluticasone propionate has been shown in vitro to exhibit a binding affinity for the human glucocorticoid receptor that is 18 times that of dexamethasone, almost twice that of beclomethasone-17-monopropionate (BMP), the active metabolite of beclomethasone dipropionate, and over 3 times that of budesonide. Data from the McKenzie vasoconstrictor assay in man are consistent with these results. The clinical significance of these findings is unknown. The precise mechanism through which fluticasone propionate affects CRSsNP and CRSwNP and associated inflammatory symptoms is not known. Corticosteroids have been shown to have a wide range of effects on multiple cell types (e.g., mast cells, eosinophils, neutrophils, macrophages, lymphocytes) and mediators (e.g., histamine, eicosanoids, leukotrienes, cytokines) involved in inflammation. The anti-inflammatory action of corticosteroids contributes to their efficacy. In 7 trials in adults, fluticasone propionate nasal spray decreased nasal mucosal eosinophils in 66% of patients (35% for placebo) and basophils in 39% of patients (28% for placebo). In addition, studies suggest that carbon dioxide, which is present in the exhaled breath delivered into the nose through the device, may influence inflammatory mediator activity and neuropeptide activity, possibly through mechanisms of action that also include removal of nitric oxide, change in pH, or positive pressure. The direct relationship of these findings to long-term symptom relief is not known.

11 DESCRIPTION The active component of XHANCE is fluticasone propionate, a corticosteroid, having the chemical name S -(fluoromethyl) 6α,9-difluoro-11β,17-dihydroxy-16α-methyl-3oxoandrosta-1,4-diene-17β-carbothioate, 17‐propionate and the following chemical structure: Fluticasone propionate is a white powder with a molecular weight of 500.57, and the empirical formula is C 25 H 31 F 3 O 5 S. It is practically insoluble in water, freely soluble in dimethylformamide, sparingly soluble in acetone and dichloromethane, and slightly soluble in 96% ethanol. XHANCE (fluticasone propionate) nasal spray, 93 mcg, for nasal administration, with an Optinose exhalation delivery system that delivers an aqueous suspension of microfine fluticasone propionate having a particle size distribution in the range of 0 to 5 microns for topical nasal administration by means of a metering, atomizing spray pump and exhaled breath. XHANCE also contains microcrystalline cellulose and carboxymethylcellulose sodium, dextrose, benzalkonium chloride, polysorbate 80, edetate disodium dihydrate, sodium hydroxide and hydrochloric acid (to adjust pH), and purified water, and has a pH between 5 and 7. Before initial use, prime XHANCE by gently shaking and then pressing the amber glass bottle 7 times or until a fine mist appears. Once primed, XHANCE contains 120 metered sprays. When XHANCE has not been used for ≥ 7 days, prime again by releasing 2 sprays into the air, away from the face [see Dosage and Administration ( 2.2 ) and Instructions for Use ] . After priming, each spray delivers 93 mcg of fluticasone propionate in an aqueous suspension through the cone-shaped nosepiece. The system also has a flexible mouthpiece. Within the device is a non‐removable amber glass bottle with a metering spray pump, an applicator, and a valve that prevents release of breath until the bottle is pressed. A base covers the bottom of the bottle, and a removable orange cap covers both the nosepiece and mouthpiece. Chemical Structure

10 OVERDOSAGE Overdosage may result in signs/symptoms of hypercorticism [see Warnings and Precautions ( 5.5 )] .

16 HOW SUPPLIED/STORAGE AND HANDLING XHANCE (fluticasone propionate) nasal spray is supplied as a non-removable amber glass bottle fitted with a metered-dose manual spray pump unit inside the white XHANCE device with a nasal applicator, valve mechanism, asymmetrical cone-shaped nosepiece, flexible mouthpiece, base, and orange cap in a box of 1. Each metered spray delivers 93 mcg of fluticasone propionate in an aqueous suspension through the cone shaped nosepiece. They are supplied as follows: One (1) bottle net fill content of 16 mL that, after priming, will provide 120 metered sprays (NDC 71715-003-31) with FDA approved Patient Labeling [see Instructions for Use ]. The bottle should be discarded after 120 metered sprays even though the bottle is not empty. Beyond 120 metered sprays, the correct amount of medication in each metered spray cannot be assured. One (1) bottle net fill content of 6.4 mL that, after priming, will provide 28 metered sprays (NDC 71715-003-32) with FDA approved Patient Labeling [see Instructions for Use ]. The bottle should be discarded after 28 metered sprays even though the bottle is not empty. Beyond 28 metered sprays, the correct amount of medication in each metered spray cannot be assured. Store at room temperature (between 15°C and 25°C; 59°F and 77°F), excursions permitted from 15°C to 30°C (59°F to 86°F). Avoid exposure to extreme heat, cold or light. Shake XHANCE before each use.