Tizan tablets contain the active ingredient tizanidine hydrochloride, which is a short-acting muscle relaxant used to treat spasticity. It works by blocking nerve impulses in the brain that cause muscle tone and spasms. Common side effects include dry mouth, drowsiness, and dizziness. Tizanidine should be taken carefully with other medications due to drug interactions and safety risks, and the recommended dosage is 2-4 mg taken up to 3 times per day as needed.