Previous hypersensitivity to penicillins, cephalosporins & other allergens. Discontinue if an allergic reaction; severe skin reactions eg, toxic epidermal necrolysis, Stevens-Johnson syndrome, dermatitis exfoliative, erythema multiforme & acute generalized exanthematous pustulosis; or superinfection w/ nonsusceptible organisms occur. Not to be used in infectious mononucleosis. Periodically check for organ system dysfunction (eg, renal, hepatic & hematopoietic system) during extended therapy. Clostridium difficile
-associated diarrhea; drug-induced liver injury eg, cholestatic hepatitis & jaundice. False-positive glycosuria in urinalysis w/ Benedict & Fehling reagent, & Clinitest. Pregnancy & lactation. Neonates (especially premature) & other infants.