Phexin 500 mg is generic alternative to Keflex 500 mg.br Cephalexin is a first-generation cephalosporin antibiotic. It is an orally administered agent with a similar antimicrobial spectrum to the intravenous agents cefalotin and cefazolin.br Cefalexin is used to treat a number of infections including otitis media, streptococcal pharyngitis, bone and joint infections, pneumonia, cellulitis, and urinary tract infections. It may be used to prevent bacterial endocarditis.br br AllDayChemist.com is a professionally managed generic drugs distributor, supplying generic drugs and formulations to patients around the world. We offer great-value generics, without ever compromising on quality.