Previous history of hypersensitivity reaction to β-lactam antibiotics. Discontinue use if hypersensitivity occurs. Seizures. Pseudomembranous colitis due to C. difficile
. Patients w/ diarrhea during or subsequent to therapy. Monitor patients carefully during therapy for superinfection. Avoid prolonged use. Not to be administered by inhalation as pneumonitis can occur. Pregnancy & lactation. Childn <18 yr.