Abstract
Background: A large percentage of patients with Parkinson's disease (PD) suffer from excessive daytime sleepiness (EDS). This study aims to compare the effectiveness of modafinil and methylphenidate on EDS and side effects. Methods: Fifty nine patients with PD and EDS [Epworth Sleepiness Scale (ESS) more than 9] were recruited in a double-blind placebo controlled trial. Twenty-two patients received modafinil 200 mg daily, twenty-six patients received methylphenidate 10 mg daily, and 11 patients received placebo for 6 weeks. Pittsburgh Sleep Quality Index (PSQI) and ESS were filled out at baseline and 6 weeks later. Results: There was no significant difference in demographics, PSQI, and ESS variables at baseline. The mean of ESS scores decreased significantly in modafinil (17.36 ± 5.05 vs. 10.55 ± 4.62, P < 0.001) and methylphenidate (16.27 ± 5.40 vs. 12.23 ± 6.28, P < 0.001) groups after 6-week trial, compared with control group (14.27 ± 4.49 vs. 14.09 ± 4.46, P = 0.710). The effectiveness of modafinil and methylphenidate on improving daytime sleepiness and night sleep of patients was not significantly different. Conclusion: Both modafinil and methylphenidate were effective drugs in improving EDS and quality of sleep without significant difference in efficiency and side effects.
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