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Tizanidine  - trade names Zanaflex , Sirdaludis a drug that is used as a muscle relaxant. It is a centrally acting α2 adrenergic agonist. It is used to treat the spasms, cramping, and tightness of muscles caused by medical problems such as multiple sclerosis, spastic diplegia, back pain, or certain other injuries to the spine or central nervous system. It is also prescribed off-label for migraine headaches, as a sleep aid, and as an anticonvulsant. It is also prescribed for some symptoms of fibromyalgia

Side effects include hypotension, liver damage, drowsiness, dry mouth with increased dosage, and dizziness.

Tizanidine is a potent sedative. It therefore has the potential, to interact with other CNS depressants. Alcohol should be avoided, particularly as it can cause stomach upset.

On Jun, 20, 2015: 6,740 people reported to have side effects when taking Zanaflex. Among them, 159 people (2.36%) have Hallucination.

On Jun, 7, 2015: 6,740 people reported to have side effects when taking Zanaflex. Among them, 73 people (1.08%) have Death.