Discontinue use if symptoms of shock (including anaphylactic shock & anaphylaxis) eg, redness, itching, urticaria, edema of face or other parts & dyspnea; SJS & TEN eg, fever, erythema, blistering, itching, ocular congestion or stomatitis occur. Discontinue treatment or reduce dose in the event of weakness, light-headedness or sleepiness. Patients w/ history of hypersensitivity. May impair ability to drive car or operate machinery. Hepatic function disorder. Pregnancy. Avoid use in nursing mothers. Discontinue breastfeeding during treatment. Childn. Elderly.