Serious skin reactions eg, acute generalized exanthematous pustulosis, SJS, & TEN. Discontinue use at the 1st appearance of skin rash or any other sign of hypersensitivity. Hepatocellular insufficiency, severe renal insufficiency, G6PD; chronic alcoholism, excessive alcohol intake (≥3 alcoholic drinks every day), anorexia, bulimia or cachexia, chronic malnutrition (low reserves of hepatic glutathione), dehydration, hypovolemia. Pregnancy.