Symetrel is used to treat the symptoms of Parkinson's disease, improving movement and muscle control. It is also used as an adjunct to the side effects of other antipsychotic medications that may cause muscle stiffness or abnormal movements.
Symetrel may also be prescribed to prevent and treat influenza in some cases, but it is not a substitute for influenza vaccines. It is always recommended to use this medication under direct medical supervision to avoid any complications or unwanted drug interactions.