I want to know if levaquin treats strep throat or bacterial pharyngitis since i'm allergic to penicillin and resistant to biaxin (clarithromycin)?.

Not a good choice: Levaquin is a broad spectrum antibiotic and usually preferred for more serious infections. Strep throat is usually still amenable to most first generation antibiotics. Being allergic to penicillin suggests u shd try a cephalosporin which shd help. Resistant to Biaxin (clarithromycin) is unlikely and erythromycins may still work. Relatively safer medications like clindamycin also exist.