Lancet 2000 Apr 15;355(9212):1332-3 Sleep attacks (sleep episodes) with pergolide. Schapira AH Increased sedation, somnolence, and sleep episodes seem to occur with several, if not all, dopamine agonists and dopaminergic treatment. Patients at risk of sleep episodes can be identified by well-chosen questions, and could be managed by appropriate measures including dose reduction.