Sirdalud 4mg is a prescription medication containing the active ingredient tizanidine, a muscle relaxant. It is used to treat muscle spasticity, which can result from conditions such as multiple sclerosis, spinal cord injuries, or other neurological disorders. Sirdalud works by blocking nerve impulses (or pain sensations) that are sent to the brain, helping to reduce muscle tightness and improve movement.

Each tablet contains 4mg of tizanidine, and the medication is typically taken orally, with dosing based on the patient's individual needs and response to treatment. As with all medications, it is important to follow a doctor's instructions and avoid sudden discontinuation, as stopping it abruptly can lead to withdrawal symptoms.

Possible side effects include drowsiness, dizziness, dry mouth, and low blood pressure. Always consult a healthcare professional before starting or adjusting dosage.