Headache, sinus & tension headache, migraine, head discomfort; pain, back, neck & facial pain, pain in extremity, arthralgia, pyrexia, chills, flu-like illness, nasopharyngitis, pharyngolaryngeal pain, oropharyngeal blistering, throat tightness. Anaemia, haemolysis, haemolytic anaemia, leukopenia; hypersensitivity; dizziness, vertigo; HTN, flushing, hot flush, hyperaemia, hypotension; dyspnoea, chest pain & discomfort, painful respiration; nausea, vomiting, diarrhoea, abdominal pain; hyperbilirubinaemia; skin disorder & exfoliation, rash, pruritus, urticaria, maculopapular rash, erythema; myalgia, muscle spasms, musculoskeletal stiffness & pain; fatigue, asthenia, muscular weakness; decreased Hb, red blood cell count, haematocrit, +ve direct Coombs' test, increased ALT, AST & blood lactate dehydrogenase.