Zanaflex, whose generic name is tizanidine, is a medication primarily used to manage spasticity, a condition where muscles are continuously contracted, which can lead to stiffness, pain, and discomfort. It functions as a short-acting muscle relaxer by blocking nerve impulses (pain sensations) that are sent to the brain. This action helps to reduce muscle spasms associated with multiple sclerosis, spinal cord injuries, or other neurological disorders. Zanaflex is available in tablet form or as a capsule and should be taken exactly as prescribed by a healthcare provider, due to its potential for side effects and interactions with other medications. It is important for patients to follow their doctor's instructions closely, including any recommendations regarding the gradual increase of dosage to minimize side effects.