SPL Set ID: 397471e5-76e2-462c-af30-bcc54fe00266

Azithromycin Tablets, USP contain the active ingredient azithromycin, USP, a macrolide antibacterial drug, for oral administration. Azithromycin, USP has the chemical name (2 R ,3 S ,4 R ,5 R ,8 R ,10 R ,11 R ,12 S ,13 S ,14 R )-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, USP is derived from erythromycin; however, it differs chemically from erythromycin in that a methyl-substituted nitrogen atom is incorporated into the lactone ring. Azithromycin, USP has the following structural formula: C 38 H 72 N 2 O 12 M.W. 749 Azithromycin, USP, as the monohydrate, is a white crystalline powder with a molecular formula of C 38 H 72 N 2 O 12 •H 2 O and a molecular weight of 767. Azithromycin Tablets, USP are supplied for oral administration as tablets containing azithromycin monohydrate equivalent to 500 mg azithromycin, USP and the following inactive ingredients: corn starch, dibasic calcium phosphate anhydrous, croscarmellose sodium, FD&C Blue #2, hypromellose, lactose monohydrate, magnesium stearate, microcrystalline cellulose, polyethylene glycol, sodium citrate, sodium lauryl sulfate, and titanium dioxide. structural formula