Orphenadrine hydrochloride is primarily used as a muscle relaxant in the treatment of muscle pain and discomfort. It works by blocking nerve impulses that send pain signals to the brain, providing relief from muscle spasms and associated pain. It is often prescribed for conditions such as sprains, strains, and other musculoskeletal injuries. Additionally, it is sometimes used as an adjunct in the management of Parkinson's disease to help reduce stiffness and tremors. The medication is typically administered orally or via injection, depending on the severity of the condition. Patients are advised to follow their healthcare provider's instructions carefully to avoid potential side effects such as dizziness or drowsiness.