Nausea, vomiting, epigastric pain, abdominal cramps, anorexia, diarrhoea, haematemesis; headache, irritability, restlessness, nervousness, insomnia, dizziness, reflex hyperexcitability, seizures; palpitations, sinus tachycardia, extrasystoles, increased pulse rate, flushing, circulatory failure, hypotension, ventricular arrhythmias; transient increase in urinary frequency, dehydration, twitching of fingers and hands, tachypnoea, elevated serum AST concentrations.
Potentially Fatal: Convulsions, cardiac arrhythmias, severe hypotension or cardiac arrest.