ROMAC is the trade name of Roxithromycin, a macrolide antibiotic.

Each ROMAC 100, 150 and 300 Film-Coated Tablet contains Roxithromycin 100, 150 and 300 mg, respectively.

CHEMISTRY

Roxithromycin is: (3R, 4S, 5S, 6R, 7R, 9R, 11S, 12R, 13S, 14R)-4-[(2,6-dideoxy-3-C-methyl-3-O-methyl-a-L-ribo-hexopyranosyl)oxy]-4-ethyl-7,12,13-trihydroxy-10-[(E)-[(2-methoxyethoxy)methoxy]imino]-3,5,7,9,11,13-hexamethyl-6-[[3,4,6-trideoxy-3-(dimethylamino)-b-D-xylo-hexopyranosyl]oxy]-oxacyclotetradecan-2-one.