SPL Set ID: d5c95c30-564f-4b67-ac6d-9179cdfaa5a8

Azithromycin tablets, USP contain the active ingredient azithromycin, USP a macrolide antibacterial drug, for oral administration. Azithromycin has the chemical name (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-dideoxy-3-C-methyl-3-O-methyl-α-L-ribo-hexopyranosyl) oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one. Azithromycin is derived from erythromycin; however, it differs chemically from erythromycin in that a methyl-substituted nitrogen atom is incorporated into the lactone ring. Its molecular formula is C 38 H 72 N 2 O 12 , and its molecular weight is 749. Azithromycin has the following structural formula: Azithromycin as the dihydrate, is a white or almost white powder with a molecular formula of C 38 H 72 N 2 O 12 •2H 2 O and a molecular weight of 785.02. Azithromycin tablets, USP are supplied for oral administration as pink modified capsule shaped, film-coated tablets containing azithromycin dihydrate equivalent to 500 mg azithromycin, USP and the following inactive ingredients: anhydrous dibasic calcium phosphate, croscarmellose sodium, hydroxypropyl cellulose, magnesium stearate, sodium lauryl sulfate, lactose monohydrate, hypromellose, titanium dioxide, triacetin and D&C Red #30 Aluminum Lake. FDA approved dissolution specification differs from the USP dissolution specification. Structure