Phlebitis, thrombophlebitis. Diarrhea, rash, erythema, pruritus, vomiting, allergic reactions, nausea, urticaria, superinfections, skin reactions, eruption, increased sweating, erythema, multiforme, eczema, exanthema, maculopapular rash, soft/loose stools, stomatitis, constipation, muscular weakness, hallucination, dry mouth, hypotension, muscle pain, superficial phlebitis, fever, hot flushes, oedema, tiredness, local inj site inflammation & pain, leucopenia, eosinophilia, thrombocytosis, thrombocytopenia, +ve Coombs' test, hypokalemia, increased serum liver enzymes, bilirubin & renal function parameters.