http://www.medications.com/se/Amantadine+Hydrochloride Recent side effects for Amantadine Hydrochloride Mon, 31 Mar 2008 21:40:05 -0400 http://www.medications.com/effect/view/28886 My father took Amantadine for his Parkinson's disease and a few weeks after starting, went in to neuroleptic malignant syndrome. He was hospitalized for 10 days, and was unresponsive for 4-5 days. As an elderly man, he did not exhibit the exact symptoms http://www.medications.com/effect/view/28886