Antiviral drugs are also anti-tremor paralysis drugs. Used in the manufacture of synthetic adamantane derivatives amantadine hydrochloride, etc.
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Summary
Amantadine was approved as a preventive drug for influenza by the U.S. Food and Drug Administration in October 1966, and then approved for the treatment of adult influenza virus. In 1969, the drug was found to reduce the symptoms of Parkinson's disease and drug-induced extrapyramidal syndrome. In 2017, the US Food and Drug Administration approved amantadine controlled-release dosage form for the treatment of ADHD in patients with Parkinson's disease.