Antiemetic

An antiemetic is a drug that is effective against vomiting and nausea. Antiemetics are typically used to treat motion sickness and the side effects of opioid analgesics, general anaesthetics, and chemotherapy directed against cancer. They may be used for severe cases of gastroenteritis, especially if the patient is dehydrated.

Some antiemetics previously thought to cause birth defects, appear safe for use by pregnant women in the treatment of morning sickness and the more serious hyperemesis gravidarum.[1][2]

Types
  • 5-HT3 receptor antagonists block serotonin receptors in the central nervous system and gastrointestinal tract. As such, they can be used to treat post-operative and cytotoxic drug nausea & vomiting. However, they can also cause constipation or diarrhea, dry mouth, and fatigue.[3]
    • Dolasetron (Anzemet) can be administered in tablet form or in an injection.
    • Granisetron (Kytril, Sancuso) can be administered in tablet (Kytril), oral solution (Kytril), injection D(Kytril), or in a single transdermal patch to the upper arm (SANCUSO).
    • Ondansetron (Zofran) is administered in an oral tablet form, orally dissolving tablet form, orally dissolving film, sublingual, or in an IV/IM injection.
    • Tropisetron (Setrovel, Navoban) can be administered in oral capsules or in injection form.
    • Palonosetron (Aloxi) can be administered in an injection or in oral capsules.
  • Dopamine antagonists act on the brainstem and are used to treat nausea and vomiting associated with cancer, radiation sickness, opioids, cytotoxic drugs and general anaesthetics. Side effects include muscle spasms and restlessness.[3]
  • NK1 receptor antagonist
    • Aprepitant (Emend) is a commercially available NK1 Receptor antagonist
    • Casopitant is an investigational NK1 receptor antagonist
    • Rolapitant (Varubi) another recently approved drug from this class
  • Antihistamines (H1 histamine receptor antagonists) are effective in many conditions, including motion sickness, morning sickness in pregnancy, and to combat opioid nausea. H1 receptors in central areas include area postrema and vomiting center in the vestibular nucleus. Also, many of the antihistamines have anticholinergic properties that block muscarinic receptors at the same sites.
  • Cannabinoids are used in patients with cachexia, cytotoxic nausea, and vomiting, or who are unresponsive to other agents. These may cause changes in perception, dizziness, and loss of coordination.[3]
    • Cannabis, also known as medical marijuana in the United States, is a Schedule I drug.[7][8]
    • Dronabinol (Marinol/Syndros) is a Schedule II drug in the U.S.[9]
    • Some synthetic cannabinoids such as Nabilone (Cesamet) or the JWH series.
    • Sativex is an oral spray containing THC and CBD. It is currently legal in Canada and a few countries in Europe & the US as of June 25, 2018.
  • Benzodiazepines (GABA receptor agonists)
    • Midazolam (Versed) is given at the onset of anesthesia and has been shown in recent trials to be as effective as ondansetron, but most effective when used in combination with ondansetron.[10]
    • Lorazepam (Ativan) is said to be very good as an adjunct treatment for nausea along with first line medications such as Compazine.
  • Anticholinergics
  • Steroids
    • Dexamethasone (Decadron) is given in low dose at the onset of a general anesthetic as an effective antiemetic. It is also used in chemotherapy as a single drug as well as with other antiemetics such as 5-HT3 receptor antagonists and NK1 receptor antagonist, but the specific mechanism of action is not fully understood.[11]
  • Other
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See also

References
  1. Quinlan, Jeffrey D.; Hill, D. Ashley (1 June 2003). "Nausea and Vomiting in Pregnancy - American Family Physician". American Family Physician. 68 (1): 121–128. Retrieved 2015-10-09.
  2. Schaefer, Christof; Scialli, Anthony; Rost van Tonningen, Margreet (2001). "Antiemetics and hyperemesis gravidarum". Drugs During Pregnancy and Lactation: Handbook of Prescription Drugs and Comparative Risk Assessment. Gulf Professional Publishing. ISBN 978-0-444-50763-1.
  3. http://www.mesotheliomaweb.org/mesothelioma/treatment/chemotherapy/anti-Enausea-treatment/%5B%5D
  4. Pae C-U (2006). "Low-dose mirtazapine may be successful treatment option for severe nausea and vomiting". Progress in Neuro-Psychopharmacology and Biological Psychiatry. 30 (6): 1143–5. doi:10.1016/j.pnpbp.2006.03.015. PMID 16632163.
  5. Kast RE, Foley KF (July 2007). "Cancer chemotherapy and cachexia: mirtazapine and olanzapine are 5-HT3 antagonists with good antinausea effects". European Journal of Cancer Care. 16 (4): 351–4. doi:10.1111/j.1365-2354.2006.00760.x. PMID 17587360.
  6. National Institute of Mental Health. PDSD Ki Database (Internet) [cited 2013 Sep 27]. Chapel Hill (NC): University of North Carolina. 1998-2013. Available from: "Archived copy". Archived from the original on 2013-11-08. Retrieved 2013-12-01.CS1 maint: archived copy as title (link)
  7. Vincent, Beverly J.; McQuiston, Debra J.; Einhorn, Lawrence H.; Nagy, Catherine M.; Brames, Mary J. (1983-05-01). "Review of Cannabinoids and their Antiemetic Effectiveness". Drugs. 25 (1): 52–62. doi:10.2165/00003495-198300251-00006. ISSN 1179-1950. PMID 6301800.
  8. "Drug Scheduling". www.dea.gov. Retrieved 2019-02-21.
  9. "2017 - Final Rule: Placement of FDA-Approved Products of Oral Solutions Containing Dronabinol [(-)-delta-9-trans-tetrahydrocannabinol (delta-9-THC)] in Schedule II". www.deadiversion.usdoj.gov. Retrieved 2019-02-21.
  10. Honarmand, Azim; Safavi, Mohammadreza; Chegeni, Mansoureh; Hirmanpour, Anahita; Nazem, Masoud; Sarizdi, Seyyad Hamid (January 2016). "Prophylactic antiemetic effects of Midazolam, Ondansetron, and their combination after middle ear surgery". Journal of Research in Pharmacy Practice. 5 (1): 16–21. doi:10.4103/2279-042X.176556. ISSN 2319-9644. PMC 4776542. PMID 26985431.
  11. Grunberg, S. M. (1 February 2007). "Antiemetic activity of corticosteroids in patients receiving cancer chemotherapy: dosing, efficacy, and tolerability analysis". Annals of Oncology. 18 (2): 233–240. doi:10.1093/annonc/mdl347. ISSN 0923-7534. PMID 17108149.
  12. Abdel-Aziz H, Windeck T, Ploch M, Verspohl EJ (2006-01-13), "Mode of action of gingerols and shogaols on 5-HT3 receptors: binding studies, cation uptake by the receptor channel and contraction of isolated guinea-pig ileum", Eur J Pharmacol, 530 (1–2): 136–43, doi:10.1016/j.ejphar.2005.10.049, PMID 16364290
  13. Huang, Q.; Iwamoto, Y.; Aoki, S.; Tanaka, N.; Tajima, K.; Yamahara, J.; Takaishi, Y.; Yoshida, M.; Tomimatsu, T.; Tamai, Y. (1991). "Anti-5-hydroxytryptamine3 effect of galanolactone, diterpenoid isolated from ginger". Chemical & Pharmaceutical Bulletin. 39 (2): 397–399. doi:10.1248/cpb.39.397. PMID 2054863.
  14. Marx, WM; Teleni L; McCarthy AL; Vitetta L; McKavanagh D; Thomson D; Isenring E. (2013). "Ginger (Zingiber officinale) and chemotherapy-induced nausea and vomiting: a systematic literature review" (PDF). Nutr Rev. 71 (4): 245–54. doi:10.1111/nure.12016. PMID 23550785.
  15. Ernst, E.; Pittler, M.H. (1 March 2000). "Efficacy of ginger for nausea and vomiting: a systematic review of randomized clinical trials" (PDF). British Journal of Anaesthesia. 84 (3): 367–371. doi:10.1093/oxfordjournals.bja.a013442. PMID 10793599. Retrieved 6 September 2006.
  16. O'Connor, Anahad (August 21, 2007). "The Claim: Eating Ginger Can Cure Motion Sickness". The New York Times.
  17. hoe 2#section1 Muscimol. Chemical Data Sheet, Database of Hazardous Materials, CAMEO chemicals
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