Each amantrel capsule contains amantadine hydrochloride as active ingredient. Amantrel capsule is also known as amantadine capsule. Amantadine hydrochloride is antiviral drug .This medication is used in treatment of swine flu and also used in the treatment of Parkinsonism. It acts by blocking the action of viruses in the body. Amantrel tablet is also used to treat the respiratory infections caused by influenza A.