Amantrel is a medication available in strengths of 100 mg and 50 mg, containing the active ingredient Amantadine. It is commonly used to treat viral infections like influenza A and to alleviate symptoms associated with Parkinson's disease as well as drug-induced movement disorders known as extrapyramidal reactions. This medication is produced by well-known pharmaceutical companies and is also marketed under various brand names including Amantex, Ensorex, and Parkitidin.