Back تيزانيدين Arabic Tisanidin Welsh Tizanidin German Τιζανιδίνη Greek Tizanidina Spanish تیزانیدین Persian Titsanidiini Finnish Tizanidine French Tizanidin Hungarian Tizanidin ID
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| Pronunciation | /taɪˈzænɪdiːn/ tye-ZAN-i-deen |
| Trade names | Zanaflex, Sirdalud, and others |
| Other names | 4-Chloro-N-(4,5-dihydro-1H-imidazol-2-yl)-8-thia-7,9-diazabicyclo[4.3.0]nona-2,4,6,9-tetraen-5-amine |
| AHFS/Drugs.com | Monograph |
| MedlinePlus | a601121 |
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| Routes of administration | By mouth |
| Drug class | α2-adrenergic receptor agonist |
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| Pharmacokinetic data | |
| Bioavailability | ~40%[1] |
| Protein binding | ~30% |
| Metabolism | Liver (CYP1A2, 95%) |
| Elimination half-life | 2.54 hours (tizanidine), 20–40 hours (inactive metabolites)[1] |
| Excretion | Urine (60%), feces (20%) |
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| ECHA InfoCard | 100.125.400 |
| Chemical and physical data | |
| Formula | C9H8ClN5S |
| Molar mass | 253.71 g·mol−1 |
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Tizanidine, sold under the brand name Zanaflex among others, is an alpha-2 (α2) adrenergic receptor agonist,[2] similar to clonidine, that is used to treat muscle spasticity due to spinal cord injury, multiple sclerosis, and spastic cerebral palsy.[3] Effectiveness appears similar to baclofen or diazepam.[4] It is taken by mouth.[5]
Common side effects of tizanidine include dry mouth, sleepiness, weakness, and dizziness.[5] Serious side effects may include low blood pressure, liver problems, psychosis, and QT prolongation.[5] It is unclear if use in pregnancy and breastfeeding is safe.[6] It is an α2-adrenergic agonist, but how it works is not entirely clear.[5]
Tizanidine was approved for medical use in the United States in 1996.[5] It is available as a generic medication.[3] In 2021, it was the 89th most commonly prescribed medication in the United States, with more than 8 million prescriptions.[7][8]
- ^ a b Cite error: The named reference
Zanaflex PIwas invoked but never defined (see the help page). - ^ Cite error: The named reference
Katzungwas invoked but never defined (see the help page). - ^ a b British national formulary: BNF 76 (76 ed.). Pharmaceutical Press. 2018. p. 1094. ISBN 9780857113382.
- ^ Kamen L, Henney HR, Runyan JD (February 2008). "A practical overview of tizanidine use for spasticity secondary to multiple sclerosis, stroke, and spinal cord injury". Current Medical Research and Opinion. 24 (2): 425–439. doi:10.1185/030079908X261113. PMID 18167175. S2CID 73086671.
- ^ a b c d e "Tizanidine Hydrochloride Monograph for Professionals". Drugs.com. American Society of Health-System Pharmacists. Retrieved 3 March 2019.
- ^ "Tizanidine Pregnancy and Breastfeeding Warnings". Drugs.com. Retrieved 3 March 2019.
- ^ "The Top 300 of 2021". ClinCalc. Archived from the original on 15 January 2024. Retrieved 14 January 2024.
- ^ "Tizanidine - Drug Usage Statistics". ClinCalc. Retrieved 14 January 2024.
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