" Adverse drug reactions include: nausea, vomiting, diarrhea, abdominal pain, and headache - rarer reactions include hepatitis and liver disorder, rash, severe allergic reactions, and Stephen-Johnson Syndrome (often fatal detachment of skin)... other ADRs reported in post-marketing surveillance including: toxic epidermal necrolysis (skin falling off), irregular heartbeat, seizure, confusion, abnormal behavior, inability to walk, convulsion, loss of consciousness, hallucination, aggravation of diabetes, and haemorrhagic colitis (digestive disorders).