RT Journal Article SR Electronic T1 Amantadine in Parkinson's disease JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 603 OP 603 DO 10.1212/WNL.25.7.603 VO 25 IS 7 A1 BUTRER, JOHN F. A1 SILVER, DEE E. A1 SAHS, ADOLPH L. YR 1975 UL http://n.neurology.org/content/25/7/603.abstract AB A double-blind, placebo-controlled, crossover study with long-term follow-up of amantadine in Parkinson's disease was performed on 26 patients. Other antiparkinsonian medications were discontinued in all but three patients. Amantadine resulted in a statistically significant 12 percent overall improvement over placebo. Twenty of 26 patients, without breaking the code, selected amantadine for long-term usage. Ten patients continued treatment for 10 to 12 months, and an overall statistically significant improvement was noted at 2 weeks and at 1, 2, 3, and 10 to 12 months. Improvements in tremor and rigidity remained relatively constant, while there was some apparent loss of efficacy in timed tests and quality of timed tests. Amantadine appears effective in the long-term treatment of some patients with Parkinson's disease.