Eperisone hydrochloride is primarily used as a muscle relaxant in the treatment of musculoskeletal disorders. It helps alleviate muscle stiffness, spasms, and pain associated with conditions such as cervical spondylosis, low back pain, and spasticity due to spinal cord injuries or neurological disorders. By acting on the central nervous system, it reduces excessive muscle tone and improves blood flow, promoting relaxation and mobility. Additionally, it is often prescribed alongside physical therapy or other treatments to enhance recovery and improve quality of life for patients with chronic muscle-related issues.