Side effects can include, feeling drowsy or dizzy, nausea and vomiting, dry mouth, heart racing, headaches, sleep disturbance and muscle or joint stiffness. Less commonly pain or tightness in the chest. If chest pain is severe and does not pass quickly, seek urgent medical help. Rare but serious side effects can include, irregular heart rhythms, seizures, tremors, visual disturbances and severe allergic reactions.
For full information on side effects and correct use, see the patient information leaflet. If you feel very unwell, or experience significant side effects, go to your local A&E department or call 999.