what is amantadine prescribed for
1 Review. Amantadine is the generic form of the brand-name drug Symmetrel, which is used to treat and prevent respiratory infections caused by the influenza A virus. It can also treat symptoms of Parkinson's disease, such as stiffness and shaking, and conditions that are similar to Parkinson's disease.Amantadine was initially used to prevent influenza A during flu season. Later, doctors discovered its benefits for treating symptoms of Parkinson's disease.mantadine is an antiviral drug that is believed to work by stopping the growth of a virus. It helps treat the symptoms of Parkinson's disease by increasing the effects of dopamine.