SPL Set ID: bc2b7a3d-72cf-497c-95b0-ba2b71f63c64

BELBUCA is a buccal film that provides transmucosal delivery of buprenorphine, a partial opioid agonist. BELBUCA is a rectangular bi-layer, peppermint-flavored, buccal film with rounded corners, consisting of a white to off-white backing layer with strength identifier printed in black ink and a light yellow to yellow active mucoadhesive layer containing buprenorphine hydrochloride. The yellow side of the film is applied to the inside of the cheek where it adheres to the moist buccal mucosa to deliver the drug as the film dissolves. Buprenorphine hydrochloride USP is the active ingredient in BELBUCA. The chemical name of buprenorphine hydrochloride is 6,14-ethenomorphinan-7-methanol, 17-(cyclopropylmethyl)- α-(1,1-dimethylethyl)-4, 5-epoxy-18,19-dihydro-3-hydroxy-6-methoxy-α-methyl-, hydrochloride, [5α, 7α, (S)]. Its structural formula is as follows: The molecular weight of buprenorphine hydrochloride is 504.10; the empirical formula is C 29 H 41 NO 4 ∙HCl. Buprenorphine hydrochloride occurs as a white or off-white crystalline powder. It is sparingly soluble in water, freely soluble in methanol, soluble in alcohol, and practically insoluble in cyclohexane. The pKa is 8.5 for the amine function and 10.0 for the phenol function. Dosage strengths of BELBUCA are based on the active moiety, buprenorphine. BELBUCA is available as 75 mcg, 150 mcg, 300 mcg, 450 mcg, 600 mcg, 750 mcg, and 900 mcg buprenorphine per film. The strength of each film is dependent on the buprenorphine concentration in the formulation and the surface area of the film. Table 6 lists the dosage strength, equivalent amount of buprenorphine hydrochloride USP (active ingredient), unique identifier and film size for each strength. Table 6: BELBUCA Identifier and Film Size Buprenorphine Strength (mcg) Buprenorphine Hydrochloride (mcg) BELBUCA Identifier Film Size (cm 2 ) 75 80.9 E0 1.215 150 161.8 E1 2.431 300 323.4 E3 0.934 450 485.1 E4 1.400 600 646.8 E6 1.867 750 808.5 E7 2.334 900 970.2 E9 2.801 Each buccal film also contains carboxymethylcellulose sodium USP, citric acid anhydrous USP, hydroxyethylcellulose NF, hydroxypropylcellulose NF, methylparaben NF, monobasic sodium phosphate anhydrous USP, peppermint oil NF, polycarbophil USP, propylene glycol USP, propylparaben NF, sodium benzoate NF, sodium hydroxide NF, saccharin sodium NF, titanium dioxide USP, vitamin E acetate USP, yellow iron oxide, purified water USP, and TekPrint SW-9008 black ink (shellac NF, black iron oxide NF). Chemical Structure