Symptomerne på overdosering omfatter: svimmelhed, tremor, hovedpine, træthed, krampeanfald, hallucinationer, konfusion, maveubehag, nedsat nyre - og leverfunktion samt krystalluri og hæmaturi.
Symptoms in overdose consist of dizziness, tremor, headache, tiredness, seizures, hallucinations, confusion, abdominal discomfort, renal and hepatic impairment as well as crystalluria and haematuria.