The most common side effects with Tasmar (seen in more than 1 patient in 10) are nausea (feeling sick), anorexia (loss of appetite), diarrhoea, dyskinesia (uncontrollable movements), dystonia (muscle spasms), headache, dizziness, sleep disorders, excessive dreaming, somnolence (sleepiness), confusion, hallucination (seeing things that are not there) and orthostatic complaints (dizziness on standing).