Diarrhoea, nausea w/ or w/o vomiting & abdominal pain. Leukopenia, eosinophilia, pancytopenia, thrombocytopenic purpura, agranulocytosis & bone marrow hypoplasia; drowsiness, dizziness, nervousness, headache, blurred vision & insomnia; urticaria, rash & facial oedema; papillary necrosis, renal failure, haematuria & dysuria; eye irritation, ear pain, perspiration & mild hepatic toxicity, mouth dryness w/ difficulty in swallowing, thirst, pupil dilatation w/ loss of accommodation & photophobia, increased IOP, skin flushing, transient bradycardia followed by tachycardia w/ palpitations & arrhythmias, difficult micturition & constipation. Mefenamic acid: Auto-immune hemolytic anaemia (continuous administration for ≥12 mth).