Pyrantel
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| Clinical data | |
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| Trade names | Pin-X, Combantrin, others[1] |
| Routes of administration | by mouth |
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| Pharmacokineticdata | |
| Bioavailability | poorly absorbed |
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| CompTox Dashboard(EPA) | |
| ECHA InfoCard | 100.036.143 |
| Chemical and physical data | |
| Formula | C11H14N2S |
| Molar mass | 206.31g·mol−1 |
| 3D model (JSmol) | |
| Melting point | 178 to 179 °C (352 to 354 °F) |
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Pyrantelis a medication used to treat a number ofparasitic worm infections.[2]This includesascariasis,hookworm infections,enterobiasis(pinworm infection),trichostrongyliasis,andtrichinellosis.[2]It is taken by mouth.[2]
Side effects include nausea, headache, dizziness, trouble sleeping, and rash.[2]A lower dose should be used in people with liver disease.[2]While it does not appear to be harmful duringpregnancy,it has not been studied for this use.[3]It is unclear if it is safe for use duringbreastfeeding.[2]It is in theantihelminticfamily of medications.[4]It works by paralyzing worms.[4]
Pyrantel was initially described in 1965.[5]It is on theWorld Health Organization's List of Essential Medicines.[6]Pyrantel is available as ageneric medication.[4]It may also be used to treat worms in a number of other animals.[5]
Pregnancy and breastfeeding
[edit]Pyrantel pamoate is considered apregnancy categoryC drug for use during pregnancy for humans, but is in category A for canines and felines. Pyrantel is considered safe to use in nursing animals.[7]
Mechanism of action
[edit]Pyrantel pamoate acts as adepolarizing neuromuscular blocking agent,thereby causing sudden contraction, followed by paralysis, of thehelminths.This has the result of causing the worm to "lose its grip" on the intestinal wall and be passed out of the system by natural process. Since Pyrantel is poorly absorbed by the host's intestine, the host is unaffected by the small dosage of medication used. Spastic (tetanic) paralyzing agents, in particular pyrantel pamoate, may induce complete intestinal obstruction in a heavy worm load.[8]This obstruction is usually in the form of a worm impaction and happens when a very small, but heavily parasitized animal is treated and tries to pass a large number of dislodged worms at once. Worms usually pass in normal stool or with diarrhea, straining, and occasional vomiting.
Names
[edit]There are a number of brands, including "Reese's Pinworm Medicine", "Pin-X", "Pin-Rid", "PYRANTRIN", "COMBANTRIN", "Anthel", "Helmintox", "Helmex", "Strongid" and Drontal Cat.
References
[edit]- ^Hamilton R (2015).Tarascon Pocket Pharmacopoeia 2015 Deluxe Lab-Coat Edition.Jones & Bartlett Learning. p. 54.ISBN9781284057560.
- ^abcdefWorld Health Organization(2009). Stuart MC, Kouimtzi M, Hill SR (eds.).WHO Model Formulary 2008.World Health Organization. pp. 89, 608.hdl:10665/44053.ISBN9789241547659.
- ^"Pyrantel Use During Pregnancy".Drugs.com.Archivedfrom the original on 20 December 2016.Retrieved8 December2016.
- ^abc"Pyrantel Pamoate".The American Society of Health-System Pharmacists.Archivedfrom the original on 20 December 2016.Retrieved8 December2016.
- ^abMaddison JE, Page SW, Church DB (2008).Small Animal Clinical Pharmacology.Elsevier Health Sciences. p. 209.ISBN978-0702028588.Archivedfrom the original on 2016-12-20.
- ^World Health Organization(2019).World Health Organization model list of essential medicines: 21st list 2019.Geneva: World Health Organization.hdl:10665/325771.WHO/MVP/EMP/IAU/2019.06. License: CC BY-NC-SA 3.0 IGO.
- ^Plumb DC (2005).Plumb's veterinary drug handbook.Stockholm, Wis: PharmaVet.ISBN978-0-8138-0518-4.
- ^Salman AB (April 1997). "Management of intestinal obstruction caused by ascariasis".Journal of Pediatric Surgery.32(4): 585–587.doi:10.1016/S0022-3468(97)90712-0.PMID9126759.
External links
[edit]- "Pyrantel".Drug Information Portal.U.S. National Library of Medicine.
