Symmetrel (Generic Amantadine) is an antiviral medication. It is used to treat Parkinson's disease and conditions similar to those of Parkinson's disease. It is also used to prevent and treat respiratory infections caused by influenza A virus. Symmetrel helps in fighting the actions of viruses in your body. It is contraindicated in hypersensitivity, pregnancy and lactation. It is not advisable for patients with liver or renal toxicity.