Amoxicillin Amoxil vs Doxycycline Vibramycin Amoxicillin (Moxatag, Amoxil) and doxycycline (Doryx, Vibramycin) are prescription antibiotics made use of to deal with microbial infections of the breathing tract and also various other infections. Amoxicillin is additionally utilized to treat bacterial infections of the center ear, tonsils, throat, urinary system tract, and also skin. It likewise is utilized to deal with gonorrhea.