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