|Other names||Metyrosine (USAN US)|
|AHFS/Drugs.com||Micromedex Detailed Consumer Information|
|Elimination half-life||3.4–3.7 hours|
|CompTox Dashboard (EPA)|
|Chemical and physical data|
|Molar mass||195.218 g·mol−1|
|3D model (JSmol)|
|(what is this?)|
Metirosine (INN and BAN; α-Methyltyrosine, Metyrosine USAN, AMPT) is an antihypertensive drug. It inhibits the enzyme tyrosine hydroxylase and, therefore, catecholamine synthesis, which, as a consequence, depletes the levels of the catecholamines dopamine, adrenaline and noradrenaline in the body.
It is available as a generic medication.
Metirosine has been shown to suppress catecholamine synthesis and alleviate symptoms related to catecholamine excess, including hypertension, headache, tachycardia, constipation, and tremor. Metirosine is primarily used to reduce these symptoms in patients with pheochromocytoma. It is contraindicated for the treatment of essential hypertension.
However it is now rarely used in medicine, its primary use being in scientific research to investigate the effects of catecholamine depletion on behavior. There is evidence that catecholamine depletion causes an increase in sleepiness that is more pronounced than sleep deprivation, and that the fatigue lingers after the drug is discontinued. Negative mood is also a reported side effect of catecholamine depletion, although this is reported less consistently than sleepiness.
This section needs expansion. You can help by adding to it. (April 2019)
- "Metyrosine: FDA-Approved Drugs". U.S. Food and Drug Administration. Retrieved 15 August 2020.
- Naruse, Mitsuhide; Satoh, Fumitoshi; Tanabe, Akiyo; Okamoto, Takahiro; Ichihara, Atsuhiro; Tsuiki, Mika; Katabami, Takuyuki; Nomura, Masatoshi; Tanaka, Tomoaki (2018). "Efficacy and safety of metyrosine in pheochromocytoma/paraganglioma: a multi-center trial in Japan". Endocrine Journal. 65 (3): 359–371. doi:10.1507/endocrj.EJ17-0276. ISSN 0918-8959. PMID 29353821.
- Green KN, Larsson SK, Beevers DG, Bevan PG, Hayes B (August 1982). "Alpha-methyltyrosine in the management of phaeochromocytoma". Thorax. 37 (8): 632–3. doi:10.1136/thx.37.8.632. PMC 459390. PMID 7179194.
- O'Leary, OF; Bechtholt, AJ; Crowley, JJ; Hill, TE; Page, ME; Lucki, I (2007). "Depletion of serotonin and catecholamines block the acute behavioral response to different classes of antidepressant drugs in the mouse tail suspension test". Psychopharmacology. 192 (3): 357–71. doi:10.1007/s00213-007-0728-9. PMID 17318507. S2CID 24850438.
- McCann, Una D.; Penetar, David M.; Shaham, Yavin; Thome, David R.; Sing, Helen C.; Thomas, Maria L.; Gillin, J. Christian; Belenky, Gregory (June 1993). "Effects of Catecholamine Depletion on Alertness and Mood in Rested and Sleep Deprived Normal Volunteers". Neuropsychopharmacology. 8 (4): 345–356. doi:10.1038/npp.1993.34. ISSN 0893-133X. PMID 8099791.
- "Metyrosine". Drug Information Portal. U.S. National Library of Medicine.