SPL Set ID: d6cc66c9-6f97-4ea8-a787-30a048004c77

BUDESONIDE AND FORMOTEROL FUMARATE DIHYDRATE INHALATION AEROSOL 80/4.5 and BUDESONIDE AND FORMOTEROL FUMARATE DIHYDRATE INHALATION AEROSOL 160/4.5 each contain micronized budesonide and micronized formoterol fumarate dihydrate for oral inhalation only. Each BUDESONIDE AND FORMOTEROL FUMARATE DIHYDRATE INHALATION AEROSOL 80/4.5 and BUDESONIDE AND FORMOTEROL FUMARATE DIHYDRATE INHALATION AEROSOL 160/4.5 canister is formulated as a hydrofluoroalkane (HFA 227; 1,1,1,2,3,3,3-heptafluoropropane)-propelled pressurized metered dose inhaler containing 120 actuations [see Dosage Forms and Strengths (3) and How Supplied/Storage and Handling (16) ] . After priming, each actuation meters either 91/5.1 mcg or 181/5.1 mcg from the valve and delivers either 80/4.5 mcg, or 160/4.5 mcg (budesonide micronized/formoterol fumarate dihydrate micronized) from the actuator. The actual amount of drug delivered to the lung may depend on patient factors, such as the coordination between actuation of the device and inspiration through the delivery system. BUDESONIDE AND FORMOTEROL FUMARATE DIHYDRATE INHALATION AEROSOL also contains povidone K25 USP as a suspending agent and polyethylene glycol 1000 NF as a lubricant. BUDESONIDE AND FORMOTEROL FUMARATE DIHYDRATE INHALATION AEROSOL should be primed before using for the first time by releasing two test sprays into the air away from the face, shaking well for 5 seconds before each spray. In cases where the inhaler has not been used for more than 7 days or when it has been dropped, prime the inhaler again by shaking well for 5 seconds before each spray and releasing two test sprays into the air away from the face. One active component of BUDESONIDE AND FORMOTEROL FUMARATE DIHYDRATE INHALATION AEROSOL is budesonide, a corticosteroid designated chemically as (RS)-11β, 16α, 17,21-Tetrahydroxypregna-1,4-diene-3,20-dione cyclic 16,17-acetal with butyraldehyde. Budesonide is provided as a mixture of two epimers (22R and 22S). The empirical formula of budesonide is C 25 H 34 O 6 and its molecular weight is 430.5. Its structural formula is: Budesonide is a white to off-white, tasteless, odorless powder which is practically insoluble in water and in heptane, sparingly soluble in ethanol, and freely soluble in chloroform. Its partition coefficient between octanol and water at pH 7.4 is 1.6 x 10 3 . The other active component of BUDESONIDE AND FORMOTEROL FUMARATE DIHYDRATE INHALATION AEROSOL is formoterol fumarate dihydrate, a selective beta 2 -agonist designated chemically as (R*,R*)-(±)-N-[2-hydroxy-5-[1-hydroxy-2-[[2-(4-methoxyphenyl)-1-methylethyl]amino]ethyl]phenyl]formamide, (E)-2-butendioate(2:1), dihydrate. The empirical formula of formoterol is C 42 H 56 N 4 O 14 and its molecular weight is 840.9. Its structural formula is: Formoterol fumarate dihydrate is a powder which is slightly soluble in water. Its octanol-water partition coefficient at pH 7.4 is 2.6. The pKa of formoterol fumarate dihydrate at 25°C is 7.9 for the phenolic group and 9.2 for the amino group. budesonide structural formula structural fumarate