Hypersexuality induced by dopaminergic drug treatment in parkinsonian patients is a rarely reported side-effect. A case history is presented where it occurred together with hyperkinesias while the patient was treated with L-dopa and bromocriptine. An addictive misuse of these drugs complicate the guidance of this patient. Approximately three years after the beginning of hypersexuality he developed several paranoid-hallucinatory psychoses which subsided each time upon dose reduction.