BUDESONIDE

Budesonide rectal foam contains budesonide, a non-halogenated synthetic glucocorticoid, as the active ingredient. It is a mixture of the 2 epimers (22R and 22S) differing in the position of an acetal chain. Both epimers are active glucocorticoids applied in a mixture of approximately 1:1. Budesonide is designated chemically as (RS)-11β, 16α, 17,21 tetrahydroxypregna-1,4-diene-3,20-dione cyclic 16,17-acetal with butyraldehyde. The empirical formula of budesonide is C 25 H 34 O 6 and its molecular weight is 430.5. Its structural formula is: Budesonide rectal foam contains 2 mg budesonide per metered dose. Inactive ingredients: cetyl alcohol, citric acid monohydrate, edetate disodium, emulsifying wax, polyoxyl (10) stearyl ether, propylene glycol, and purified water. Propellant: n-butane, isobutane, and propane. formula

Budesonide rectal foam is indicated for the induction of remission in patients with active mild to moderate distal ulcerative colitis extending up to 40 cm from the anal verge. Budesonide rectal foam is a glucocorticosteroid indicated for the induction of remission in patients with active mild to moderate distal ulcerative colitis extending up to 40 cm from the anal verge. ( 1 )

• The recommended dosage is 1 metered dose administered twice daily for 2 weeks followed by 1 metered dose administered once daily for 4 weeks. ( 2.1 ) • For rectal administration only. ( 2.2 ) • Warm the canister in the hands while shaking it vigorously for 10 to 15 seconds prior to use. ( 2.2 ) 2.1 Recommended Dosage The recommended dosage regimen is 1 metered dose administered rectally twice daily for 2 weeks followed by 1 metered dose administered rectally once daily for 4 weeks. 2.2 Administration Instructions Advise patients: • Budesonide rectal foam is only to be applied rectally. It is not for oral use. • Before using budesonide rectal foam, use the bathroom to empty your bowels. • Each applicator is coated with a lubricant. If additional lubrication is needed, petrolatum or petroleum jelly can also be used. • Warm the canister in the hands while shaking it vigorously for 10 to 15 seconds prior to use. • Budesonide rectal foam can be used in a standing, lying or sitting position (e.g., while using the toilet). • Apply budesonide rectal foam in the morning and the evening for the first 2 weeks of treatment; then once daily in the evening for the next 4 weeks. When applied in the evening, use immediately prior to bedtime. Try not to empty your bowels again until the next morning. • Avoid concomitant use of CYP3A4 inhibitors (e.g., ketoconazole, grapefruit juice) during treatment with budesonide rectal foam.

Budesonide rectal foam is contraindicated in patients with a history of a known hypersensitivity to budesonide or any of the ingredients of budesonide rectal foam. Reactions have included anaphylaxis [see Adverse Reactions ( 6.2 )] . Known hypersensitivity to budesonide or any of the ingredients in budesonide rectal foam. ( 4 )

Serious and important adverse reactions include: • Hypercorticism and adrenal axis suppression [see Warnings and Precautions ( 5.1 )] • Symptoms of steroid withdrawal in those patients transferring from systemic glucocorticosteroid therapy [see Warnings and Precautions ( 5.2 )] • Increased susceptibility to infection [see Warnings and Precautions ( 5.3 )] • Other glucocorticosteroid effects [see Warnings and Precautions ( 5.4 )] Most common adverse reactions (≥ 2%) are decreased blood cortisol, adrenal insufficiency, and nausea. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Oceanside Pharmaceuticals at 1-800-321-4576 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. The data described below reflect exposure to budesonide rectal foam in 332 patients with active mild to moderate distal ulcerative colitis extending up to 40 cm from the anal verge. The median duration of exposure was 42 days. This included 14 patients exposed for at least 6 months. Budesonide rectal foam was studied primarily in 2 placebo-controlled, 6-week trials in patients with active disease (Study 1 and Study 2). In these trials, 268 patients received budesonide rectal foam 2 mg twice a day for 2 weeks followed by 2 mg once a day for 4 weeks [see Clinical Studies ( 14 )] . The most common adverse reactions (≥ 2% of the budesonide rectal foam or Placebo group and at higher frequency in the budesonide rectal foam group) were decreased blood cortisol, adrenal insufficiency, and nausea ( Table 1 ). Decreased blood cortisol was defined as a morning cortisol level of <5 mcg/dL. Adrenal insufficiency was defined as a cortisol level of <18 mcg/dL at 30 minutes post-challenge with adrenocorticotropic hormone (ACTH). A total of 10% of budesonide rectal foam-treated patients discontinued treatment due to an adverse reaction compared with 4% of placebo-treated patients. Table 1: Summary of Adverse Reactions in 2 Placebo-Controlled Trials Experienced by ≥ 2% of the budesonide rectal foam or Placebo group and at higher frequency in the budesonide rectal foam group. (Studies 1 and 2) Adverse Reaction Budesonide Rectal Foam 2 mg/25 mL N=268 n (%) Placebo N=278 n (%) Decreased blood cortisol Decreased blood cortisol was defined as a morning cortisol level of <5 mcg/dL. 46 (17) 6 (2) Adrenal insufficiency Adrenal insufficiency was defined as a cortisol level of <18 mcg/dL at 30 minutes post-challenge with ACTH. 10 (4) 2 (1) Nausea 6 (2) 2 (1) Of the 46 budesonide rectal foam treated patients with decreased blood cortisol (defined as a morning cortisol level of <5 mcg/dL) reported as an adverse event, none had adrenal insufficiency (defined as a cortisol level of <18 mcg/dL at 30 minutes post-challenge with ACTH) (see Table 2 ). All cases of adrenal insufficiency resolved. Table 2 summarizes the percentages of patients reporting glucocorticoid related effects in the 2 placebo-controlled trials (Studies 1 and 2). Table 2: Summary of Glucocorticoid Related Effects in Two Placebo-Controlled Trials (Studies 1 and 2) Adverse Reaction Budesonide Rectal Foam 2 mg/25 mL N=268 n (%) Placebo N=278 n (%) Overall 60 (22) 10 (4) Blood cortisol decreased 46 (17) Decreases in serum cortisol levels associated with budesonide treatment were seen at Weeks 1 and 2 (twice daily treatment) in the budesonide rectal foam group, but gradually returned to baseline levels during the 4 weeks of once daily treatment. 6 (2) Adrenal insufficiency 10 (4) 2 (1) Insomnia 1 (0.4) 1 (0.4) Sleep disorder 1 (0.4) 0 Acne 1 (0.4) 0 Depression 1 (0.4) 1 (0.4) Hyperglycemia 1 (0.4) 0 No clinically significant differences were observed with respect to the overall percentages of patients with any glucocorticoid related effects between budesonide rectal foam and placebo after 6 weeks of therapy. For additional details on morning cortisol levels and the response to the ACTH stimulation test, see Clinical Pharmacology ( 12.2 ) . 6.2 Postmarketing Experience In addition to adverse reactions reported from clinical trials for budesonide rectal foam, the following adverse reactions have been identified during post-approval use of other oral and rectal formulations of budesonide. 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. Cardiac disorders: hypertension Gastrointestinal disorders: pancreatitis General disorders and administration site conditions: pyrexia, peripheral edema Immune system disorders: anaphylactic reactions Nervous system disorders: dizziness, benign intracranial hypertension Psychiatric disorders: mood swings Skin and subcutaneous tissue disorders: pruritus, maculopapular rash, allergic dermatitis

CYP3A4 Inhibitors (e.g., ketoconazole, grapefruit juice): May cause increased systemic corticosteroid effects; avoid concomitant use. ( 7.1 ) 7.1 CYP3A4 Inhibitors The active ingredient of budesonide rectal foam, budesonide, is metabolized by CYP3A4. Inhibitors of CYP3A4 activity (such as ketoconazole, itraconazole, ritonavir, indinavir, saquinavir, erythromycin, cyclosporine and grapefruit juice) can increase systemic budesonide concentrations. Avoid concomitant use of CYP3A4 inhibitors with budesonide rectal foam [see Clinical Pharmacology ( 12.3 )] .