Ergotamine
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| Trade names | Ergomar, others |
| Other names | 2'-Methyl-5'α-benzyl-12'-hydroxy-3',6',18-trioxoergotaman; 9,10α-Dihydro-12'-hydroxy-2'-methyl-5'α-(phenylmethyl)ergotaman-3',6',18-trione |
| AHFS/Drugs.com | Monograph |
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| Routes of administration | Oral |
| ATC code | |
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| Pharmacokinetic data | |
| Bioavailability | Intravenous: 100%,[6] Intramuscular: 47%,[7] Oral: <1%[8] (Enhanced by co-administration of caffeine[6]) |
| Metabolism | Liver[7] |
| Elimination half-life | 2 hours[7] |
| Excretion | 90% Bile duct[7] |
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| CompTox Dashboard (EPA) | |
| ECHA InfoCard | 100.003.658 |
| Chemical and physical data | |
| Formula | C33H35N5O5 |
| Molar mass | 581.673 g·mol−1 |
| 3D model (JSmol) | |
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Ergotamine, sold under the brand name Ergomar among others, is an ergopeptine and part of the ergot family of alkaloids; it is structurally and biochemically closely related to ergoline.[9] It is structurally similar to several neurotransmitters, and it acts as a vasoconstrictor. It is used for acute migraines, sometimes with caffeine as the combination ergotamine/caffeine.[10][11]
Medicinal use of ergot fungus began in the 16th century, for the induction of childbirth; but dosage uncertainty discouraged its use. It has been used to prevent post-partum hemorrhage (bleeding after childbirth). It was first isolated from the ergot fungus by Arthur Stoll, at Sandoz in 1918, and was marketed as Gynergen in 1921.[12]
Medical uses
[edit]Ergotamine is indicated as therapy to abort or prevent vascular headache.[2][13]
Available forms
[edit]Ergotamine is available as a suppository and as a tablet, sometimes in combination with caffeine.[2][5][10][11]
Contraindications
[edit]Contraindications include: atherosclerosis, Buerger's syndrome, coronary artery disease, hepatic disease, pregnancy, pruritus, Raynaud's syndrome, and renal disease.[14] It's also contraindicated if patient is taking macrolide antibiotics (e.g., erythromycin), certain HIV protease inhibitors (e.g., ritonavir, nelfinavir, indinavir), certain azole antifungals (e.g., ketoconazole, itraconazole, voriconazole) delavirdine, efavirenz, or a 5-HT1 receptor agonist (e.g., sumatriptan).[15]
Side effects
[edit]Side effects of ergotamine include nausea and vomiting. At higher doses, it can cause raised arterial blood pressure, vasoconstriction (including coronary vasospasm) and bradycardia or tachycardia. Severe vasoconstriction may cause symptoms of intermittent claudication.[16][13]
Pharmacology
[edit]Pharmacodynamics
[edit]Ergotamine interacts with serotonin, adrenergic, and dopamine receptors.[17][18] It is an agonist of serotonin receptors including the 5-HT1 and 5-HT2 subtypes.[17] Ergotamine is an agonist of the serotonin 5-HT2B receptor and has been associated with cardiac valvulopathy.[19] Despite acting as a potent 5-HT2A receptor agonist, ergotamine is said to be non-hallucinogenic similarly to lisuride.[20][21] This is thought to be due to functional selectivity at the 5-HT2A receptor.[20][21] However, an alternative possibility is that it is due to peripheral selectivity.[22][23]
| Site | Affinity (Ki/IC50 [nM]) | Efficacy (Emax [%]) | Action |
|---|---|---|---|
| 5-HT1A | 0.17–0.3 | ? | Full agonist |
| 5-HT1B | 0.3–4.7 | ? | Agonist |
| 5-HT1D | 0.3–6.0 | ? | Agonist |
| 5-HT1E | 19–840 | ? | ? |
| 5-HT1F | 170–171 | ? | ? |
| 5-HT2A | 0.64–0.97 | ? | Full agonist |
| 5-HT2B | 1.3–45 | ? | Partial agonist |
| 5-HT2C | 1.9–9.8 | ? | Partial agonist |
| 5-HT3 | >10,000 | – | – |
| 5-HT4 | 65 | ? | ? |
| 5-HT5A | 14 | ? | Agonist |
| 5-HT5B | 3.2–16 | ? | ? |
| 5-HT6 | 12 | ? | ? |
| 5-HT7 | 1,291 | ? | Agonist |
| α1A | 15–>10,000 | – | – |
| α1B | 12–>10,000 | – | – |
| α1D | ? | ? | ? |
| α2A | 106 | ? | ? |
| α2B | 88 | ? | ? |
| α2C | >10,000 | – | – |
| β1 | >10,000 | – | – |
| β2 | >10,000 | – | – |
| D1 | >10,000 | – | – |
| D2 | 4.0–>10,000 | – | Agonist |
| D3 | 3.2–>10,000 | – | – |
| D4 | 12–>10,000 | – | – |
| D5 | 170 | ? | ? |
| H1 | >10,000 | – | – |
| H2 | >10,000 | – | – |
| M1 | 862 | ? | ? |
| M2 | 911 | ? | ? |
| M3 | >10,000 | – | – |
| M4 | >10,000 | – | – |
| M5 | >10,000 | – | – |
| Notes: All receptors are human except 5-HT5A (mouse/rat) and 5-HT5B (mouse/rat—no human counterpart).[18] No affinity for histamine H1 or H2, cannabinoid CB1, GABA, glutamate, or nicotinic acetylcholine receptors, nor the monoamine transporters (all >10,000 nM).[18] | |||
Pharmacokinetics
[edit]The bioavailability of ergotamine is around 2% orally, 6% rectally, and 100% by intramuscular or intravenous injection.[17] The low oral and rectal bioavailability is due to low gastrointestinal absorption and high first-pass metabolism.[17]
Ergotamine may not readily cross the blood–brain barrier.[22][23]
Biosynthesis
[edit]Ergotamine is a secondary metabolite (natural product) and the principal alkaloid produced by the ergot fungus, Claviceps purpurea, and related fungi in the family Clavicipitaceae.[28][unreliable medical source?] Its biosynthesis in these fungi requires the amino acid L-tryptophan and dimethylallyl pyrophosphate. These precursor compounds are the substrates for the enzyme, tryptophan dimethylallyltransferase, catalyzing the first step in ergot alkaloid biosynthesis, i.e., the prenylation of L-tryptophan. Further reactions, involving methyltransferase and oxygenase enzymes, yield the ergoline, lysergic acid. Lysergic acid (LA) is the substrate of lysergyl peptide synthetase, a nonribosomal peptide synthetase, which covalently links LA to the amino acids, L-alanine, L-proline, and L-phenylalanine. Enzyme-catalyzed or spontaneous cyclizations, oxygenations/oxidations, and isomerizations at selected residues precede, and give rise to, formation of ergotamine.[29]
Society and culture
[edit]Legal status
[edit]Ergotamine is a List I regulated chemical in the United States.[30]
References
[edit]- ^ "Prescribing medicines in pregnancy database". Therapeutic Goods Administration (TGA). 21 June 2022. Retrieved 20 May 2024.
- ^ a b c d "Ergomar- ergotamine tartrate tablet, orally disintegrating". DailyMed. 8 September 2012. Retrieved 20 May 2024.
- ^ "Ergotamine (Ergomar) Use During Pregnancy". Drugs.com. 6 May 2024. Retrieved 20 May 2024.
- ^ Anvisa (31 March 2023). "RDC Nº 784 - Listas de Substâncias Entorpecentes, Psicotrópicas, Precursoras e Outras sob Controle Especial" [Collegiate Board Resolution No. 784 - Lists of Narcotic, Psychotropic, Precursor, and Other Substances under Special Control] (in Brazilian Portuguese). Diário Oficial da União (published 4 April 2023). Archived from the original on 3 August 2023. Retrieved 15 August 2023.
- ^ a b "Ergomar sublingual- ergotamine tartrate tablet". DailyMed. 25 October 2022. Retrieved 18 May 2024.
- ^ a b Sanders SW, Haering N, Mosberg H, Jaeger H (1986). "Pharmacokinetics of ergotamine in healthy volunteers following oral and rectal dosing". European Journal of Clinical Pharmacology. 30 (3): 331–334. doi:10.1007/BF00541538. PMID 3732370. S2CID 37538721.
- ^ a b c d Tfelt-Hansen P, Johnson ES (1993). "Ergotamine". In Olesen J, Tfelt-Hansen P, Welch KM (eds.). The Headaches. New York: Raven Press. pp. 313–22.
- ^ Ibraheem JJ, Paalzow L, Tfelt-Hansen P (December 1983). "Low bioavailability of ergotamine tartrate after oral and rectal administration in migraine sufferers". British Journal of Clinical Pharmacology. 16 (6): 695–699. doi:10.1111/j.1365-2125.1983.tb02243.x. PMC 1428366. PMID 6419759.
- ^ Index Nominum 2000: International Drug Directory. Taylor & Francis. 2000. pp. 397–. ISBN 978-3-88763-075-1.
- ^ a b "Cafergot- ergotamine tartrate and caffeine tablet, film coated". DailyMed. U.S. National Library of Medicine. Archived from the original on 16 January 2014.
- ^ a b "Migergot- ergotamine tartrate and caffeine suppository". DailyMed. 29 November 2022. Retrieved 18 May 2024.
- ^ A. J. Giannini, A. E. Slaby. Drugs of Abuse. Oradell, New Jersey: Medical Economics Books, 1989.
- ^ a b Zajdel P, Bednarski M, Sapa J, Nowak G (April 2015). "Ergotamine and nicergoline - facts and myths". Pharmacological Reports. 67 (2): 360–363. doi:10.1016/j.pharep.2014.10.010. PMID 25712664. S2CID 22768662.
- ^ Giannini AJ (1986). Biological Foundations of Clinical Psychiatry. Oradell, NJ: Medical Economics Publishing Co.
- ^ "Ergotamine: Indications, Side Effects, Warnings". Drugs.com. Archived from the original on 25 March 2017. Retrieved 25 March 2017.
- ^ "Medihaler Ergotamine". drugs.com. Archived from the original on 1 April 2016. Retrieved 20 May 2016.
- ^ a b c d Ramírez Rosas MB, Labruijere S, Villalón CM, Maassen Vandenbrink A (August 2013). "Activation of 5-hydroxytryptamine1B/1D/1F receptors as a mechanism of action of antimigraine drugs". Expert Opinion on Pharmacotherapy. 14 (12): 1599–1610. doi:10.1517/14656566.2013.806487. PMID 23815106. S2CID 22721405.
- ^ a b c d PDSP Database – UNC
- ^ Cavero I, Guillon JM (2014). "Safety Pharmacology assessment of drugs with biased 5-HT(2B) receptor agonism mediating cardiac valvulopathy". Journal of Pharmacological and Toxicological Methods. 69 (2): 150–161. doi:10.1016/j.vascn.2013.12.004. PMID 24361689.
- ^ a b Karaki S, Becamel C, Murat S, Mannoury la Cour C, Millan MJ, Prézeau L, et al. (May 2014). "Quantitative phosphoproteomics unravels biased phosphorylation of serotonin 2A receptor at Ser280 by hallucinogenic versus nonhallucinogenic agonists". Molecular & Cellular Proteomics. 13 (5): 1273–1285. doi:10.1074/mcp.M113.036558. PMC 4014284. PMID 24637012.
- ^ a b Hanks J, González-Maeso J (2016). "Molecular and Cellular Basis of Hallucinogen Action". In Preedy VR (ed.). Neuropathology of Drug Addictions and Substance Misuse. Vol. 2: Stimulants, Club and Dissociative Drugs, Hallucinogens, Steroids, Inhalants and International Aspects. pp. 803–812. doi:10.1016/B978-0-12-800212-4.00075-3. ISBN 978-0-12-800212-4.
- ^ a b Canal CE (2018). "Serotonergic Psychedelics: Experimental Approaches for Assessing Mechanisms of Action". Handb Exp Pharmacol. Handbook of Experimental Pharmacology. 252: 227–260. doi:10.1007/164_2018_107. ISBN 978-3-030-10560-0. PMC 6136989. PMID 29532180.
- ^ a b Verhoeff NP, Visser WH, Ferrari MD, Saxena PR, van Royen EA (October 1993). "Dopamine D2-receptor imaging with 123I-iodobenzamide SPECT in migraine patients abusing ergotamine: does ergotamine cross the blood brain barrier?". Cephalalgia. 13 (5): 325–329. doi:10.1046/j.1468-2982.1993.1305325.x. PMID 8242725.
- ^ Silberstein SD, McCrory DC (February 2003). "Ergotamine and dihydroergotamine: history, pharmacology, and efficacy". Headache. 43 (2): 144–166. doi:10.1046/j.1526-4610.2003.03034.x. PMID 12558771. S2CID 21356727.
- ^ Rothman RB, Baumann MH, Savage JE, Rauser L, McBride A, Hufeisen SJ, et al. (December 2000). "Evidence for possible involvement of 5-HT(2B) receptors in the cardiac valvulopathy associated with fenfluramine and other serotonergic medications". Circulation. 102 (23): 2836–2841. doi:10.1161/01.cir.102.23.2836. PMID 11104741.
- ^ Rubio-Beltrán E, Labastida-Ramírez A, Haanes KA, van den Bogaerdt A, Bogers AJ, Zanelli E, et al. (December 2019). "Characterization of binding, functional activity, and contractile responses of the selective 5-HT1F receptor agonist lasmiditan". British Journal of Pharmacology. 176 (24): 4681–4695. doi:10.1111/bph.14832. PMC 6965684. PMID 31418454.
- ^ Pytliak M, Vargová V, Mechírová V, Felšöci M (2011). "Serotonin receptors - from molecular biology to clinical applications". Physiological Research. 60 (1): 15–25. doi:10.33549/physiolres.931903. PMID 20945968.
- ^ "Pharmacognosy of Ergot (Argot or St. Anthony's Fire)". pharmaxchange.info. 30 December 2011. Archived from the original on 17 July 2012.
- ^ Schardl CL, Panaccione DG, Tudzynski P (2006). "Chapter 2 Ergot Alkaloids – Biology and Molecular Biology". The Alkaloids: Chemistry and Biology. Vol. 63. pp. 45–86. doi:10.1016/S1099-4831(06)63002-2. ISBN 978-0-12-469563-4. PMID 17133714.
{{cite book}}:|journal=ignored (help) - ^ "Lists of: Scheduling Actions, Controlled Substances, Regulated Chemicals" (PDF). Drug Enforcement Administration, Diversion Control Division, Drug & Chemical Evaluation Section. U.S. Department of Justice. February 2020.
External links
[edit]- "Ergotamine and caffeine". MedlinePlus.
