Increase in liver enzymes, hepatitis, jaundice, leukopenia, eosinophilia, thrombocytopenia, agranulocytosis, anemia, "flu-syndrome" & complications (thrombocytopenia, purpura, hemolytic anemia, dyspnea, asthma-like attacks, shock, renal failure) when resuming treatment after temporary interruption, erosive gastritis, exfoliative dermatitis, Lyell's syndrome, pemphigoid reactions. Peripheral neuropathy, convulsion, psychosis, toxic encephalopathy, rheumatic syndrome, lupus erythematosus-like symptoms, pellagra.