Rizatriptan Benzoate

145202-66-0 Categories: , , ,
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Product Details:

  • Product Name: Rizatriptan Benzoate
  • CAS #: 145202-66-0
  • Mode of Action:

    Three distinct pharmacological actions have been implicated in the antimigraine effect of the triptans: (1) stimulation of presynaptic 5-HT1D receptors, which serves to inhibit both dural vasodilation and inflammation; (2) direct inhibition of trigeminal nuclei cell excitability via 5-HT1B/1D receptor agonism in the brainstem and (3) vasoconstriction of meningeal, dural, cerebral or pial vessels as a result of vascular 5-HT1B receptor agonism.

  • Pharmacodynamics:

    Rizatriptan is a selective agonist of serotonin (5-hydroxytryptamine; 5-HT) type 1B and 1D receptors. It is structurally and pharmacologically related to other selective 5-HT1B/1D receptor agonists and has only a weak affinity for 5-HT1A, 5-HT5A, and 5-HT7 receptors and no significant affinity or pharmacological activity at 5-HT2, 5-HT3 or 5-HT4 receptor subtypes or at alpha1-, alpha2-, or beta-adrenergic, dopamine1, ; dopamine2; muscarinic, or benzodiazepine receptors. This action in humans correlates with the relief of migraine headache. In addition to causing vasoconstriction, experimental data from animal studies show that Rizatriptan also activates 5-HT1 receptors on peripheral terminals of the trigeminal nerve innervating cranial blood vessels, which may also contribute to the antimigrainous effect of Rizatriptan in humans.

  • Metabolism:

    Rizatriptan is metabolized by monoamine oxidase A isoenzyme (MAO-A) to an inactive indole acetic acid metabolite. In addition, several other inactive metabolites are formed. An active metabolite, N-monodesmethyl-rizatriptan, with pharmacological activity similar to that of the parent compound has been identified in small concentrations (14%) in the plasma.

  • Toxicity:

    Symptoms of overdose include dizziness, fainting, heart and blood vessel problems, high blood pressure, loss of bowel and bladder control, slow heartbeat, and vomiting.

  • IUPAC: N, N-dimethyl-2-[5-(1H-1, 2, 4-triazol-1-ylmethyl)-1H-indol-3-yl]ethanamine
  • ATC: N02CC04
  • PubChem: 5078
  • DrugBank: DB00953 (APRD00008)
  • Formula: C15-H19-N5.C7-H6-O2
  • Molecular Mass: 391.4725
  • Synonyms: 1H-Indole-3-ethanamine, N,N-dimethyl-5-(1H-1,2,4-triazol-1-ylmethyl)-, monobenzoate, 3-(2-(Dimethylamino)ethyl)-5-(1H-1,2,4-triazol-1-ylmethyl)indole monobenzoate, L 705,126, L 705126, L-705,126, L-705126, Maxalt, Maxalt-MLT, MK 0462, MK 462, MK-0462, MK-462, Rizatriptan benzoate, UNII-WR978S7QHH
  • SMILES: CN(C)CCc1c[nH]c2c1cc(cc2)Cn3cncn3.c1ccc(cc1)C(=O)O
  • InChl: 1S/C15H19N5.C7H6O2/c1-19(2)6-5-13-8-17-15-4-3-12(7-14(13)15)9-20-11-16-10-18-20;8-7(9)6-4-2-1-3-5-6/h3-4,7-8,10-11,17H,5-6,9H2,1-2H3;1-5H,(H,8,9)
  • General Reference:
    1. Wellington K, Plosker GL: Rizatriptan: an update of its use in the management of migraine. Drugs. 2002;62(10):1539-74. [PubMed:12093318 ]
    2. Wellington K, Jarvis B: Spotlight on rizatriptan in migraine. CNS Drugs. 2002;16(10):715-20. [PubMed:12269863 ]
    3. Ikemoto F, Toru T, Aijima H, Natsumeda Y: [Rizatriptan (Maxalt), a new entity of triptan for migraine: pharmacology and therapeutic relevance]. Nihon Yakurigaku Zasshi. 2004 Apr;123(4):295-302. [PubMed:15056946 ]
    4. Villalon CM, Centurion D, Valdivia LF, De Vries P, Saxena PR: An introduction to migraine: from ancient treatment to functional pharmacology and antimigraine therapy. Proc West Pharmacol Soc. 2002;45:199-210. [PubMed:12434581 ]
    5. Tfelt-Hansen P, De Vries P, Saxena PR: Triptans in migraine: a comparative review of pharmacology, pharmacokinetics and efficacy. Drugs. 2000 Dec;60(6):1259-87. [PubMed:11152011 ]
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