Nausea, vomiting, diarrhoea, flatulence, constipation, dyspepsia, abdominal pain, heartburn & epigastric distress, GI ulceration & perforation, peptic & non-peptic GI ulceration, melaena, haematemesis, stomatitis, ulcerative stomatitis, exacerbation of ulcerative colitis & Crohn's disease, oesophagitis; hypersensitivity reactions; hyperkalaemia; insomnia, dream abnormalities, depression, confusion & hallucinations; oedema, palpitations, cardiac failure & CHF; HTN, vasculitis; glomerular & interstitial nephritis, nephrotic syndrome, haematuria, increased serum creatinine, renal papillary necrosis & failure; abnormal liver function, fatal hepatitis & jaundice.