Severe allergic reaction (eg, sudden difficulty in breathing, speaking & swallowing; swelling of eyelids, lips, tongue, face & neck; extreme dizziness or collapse; severe or itchy skin rash; skin eruption). Diarrhoea; yellowing of skin or whites of the eyes; inflammation of the pancreas; increased or reduced urine output, or blood traces in urine; skin rash caused by sensitivity to sunlight; unusual bruising or bleeding; irregular heart beat. Headache; nausea, vomiting, abdominal pain; changes in number of WBC; decreased blood bicarbonate.