Use of Amantadine in Parkinson's Disease. Results of a Double-blind Trial

In a four-week double-blind trial of 62 patients with Parkinsonism 29 were treated withamantadine and 33 with a placebo. Modest but statistically significant improvement was observed in the first group, optimum benefit occurring after the first two weeks. Patients' reactions to the drug were favourable in 79%, and side effects were insignificant. Though amantadine appears to be a useful additive drug in the treatment of Parkinsonism, its value as a single treatment is as yet undetermined.