['To assess quantitatively the influence of rotigotine transdermal patch on daytime sleepiness, the most common adverse event by non-ergot dopamine agonists (DAs), in Parkinson disease (PD) patients.', 'An open-label study enrolled PD patients with unsatisfactory control of motor symptoms. Treatment with rotigotine transdermal patch was titrated to optimal dose (4-8 mg/24 hours) over 2 to 4 weeks. Primary outcome was Epworth Sleepiness Scale (ESS) for daytime sleepiness. Secondary outcomes included Hoehn&Yahr stage, time spent with dyskinesia, Clinical Global Impression of Improvement (CGI-I) of motor symptoms, adverse events, and compliance.', 'The subjects were 31 PD patients (age 72 ± 8, Hoehn &Yahr stage 2.7 ± 0.9, mean ± SD). The ESS did not increase after rotigotine treatment (7.2 ± 4.9 before treatment, 6.2 ± 4.0 with 4 mg/24 hour, and 8.1 ± 6.4 with 8 mg/24 hour). The CGI-I score improved after treatment; responder rate reached 88.9% with 8 mg/24 hours. No patients showed worsening in other secondary outcomes. In 13 patients treated with equivalent doses of rotigotine switched from other DAs (pramipexole, ropinirole, and cabergoline), ESS did not increase after treatment (10.0 ± 4.6 before and 8.6 ± 4.5 after treatment) and decreased without worsening of CGI-I in 54% patients. Other secondary outcomes did not worsen after treatment.'] Does rotigotine Transdermal Patch Make Parkinson Disease Patients Sleepy During Daytime?