Pyrantel

Last updated
Pyrantel
Pyrantel.png
Clinical data
Trade names Pin-X, Combantrin, others [1]
Routes of
administration
by mouth
ATC code
Legal status
Legal status
Pharmacokinetic data
Bioavailability poorly absorbed
Identifiers
  • 1-Methyl-2-[(E)-2-(2-thienyl)vinyl]-5,6-dihydro-4H-pyrimidine
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard 100.036.143 OOjs UI icon edit-ltr-progressive.svg
Chemical and physical data
Formula C11H14N2S
Molar mass 206.31 g·mol−1
3D model (JSmol)
Melting point 178 to 179 °C (352 to 354 °F)
  • CN1CCCN=C1/C=C/c2cccs2
  • InChI=1S/C11H14N2S/c1-13-8-3-7-12-11(13)6-5-10-4-2-9-14-10/h2,4-6,9H,3,7-8H2,1H3/b6-5+
  • Key:YSAUAVHXTIETRK-AATRIKPKSA-N

Pyrantel is a medication used to treat a number of parasitic worm infections. [2] This includes ascariasis, hookworm infections, enterobiasis (pinworm infection), trichostrongyliasis, and trichinellosis. [2] It is taken by mouth. [2]

Contents

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 during pregnancy, it has not been studied for this use. [3] It is unclear if it is safe for use during breastfeeding. [2] It is in the antihelmintic family of medications. [4] It works by paralyzing worms. [4]

Pyrantel was initially described in 1965. [5] It is on the World Health Organization's List of Essential Medicines. [6] Pyrantel is available as a generic medication. [4] It may also be used to treat worms in a number of other animals. [5]

Pregnancy and breastfeeding

Pyrantel pamoate is considered a pregnancy category C 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

Pyrantel pamoate acts as a depolarizing neuromuscular blocking agent, thereby causing sudden contraction, followed by paralysis, of the helminths. 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

There are a number of brands, including "Reese's Pinworm Medicine", "Pin-X", "Pin-Rid","PYRANTRIN", "COMBANTRIN", "Anthel", "Helmintox", "Helmex", "Strongid" and Drontal Cat.

Related Research Articles

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<span class="mw-page-title-main">Praziquantel</span> Medication

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<span class="mw-page-title-main">Ivermectin</span> Medication for parasite infestations

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<span class="mw-page-title-main">Albendazole</span> Chemical compound

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<span class="mw-page-title-main">Mebendazole</span> Medication for parasitic worm infestations

Mebendazole (MBZ), sold under the brand name Vermox among others, is a medication used to treat a number of parasitic worm infestations. This includes ascariasis, pinworm infection, hookworm infections, guinea worm infections, hydatid disease, and giardia, among others. It is taken by mouth.

<span class="mw-page-title-main">Paromomycin</span> Chemical compound

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<span class="mw-page-title-main">Levamisole</span> Chemical compound

Levamisole, sold under the brand name Ergamisol among others, is a medication used to treat parasitic worm infections, specifically ascariasis and hookworm infections. It is taken by mouth.

<span class="mw-page-title-main">Diloxanide</span> Medication for amoebic gut infections

Diloxanide is a medication used to treat amoeba infections. In places where infections are not common, it is a second line treatment after paromomycin when a person has no symptoms. For people who are symptomatic, it is used after treatment with metronidazole or tinidazole. It is taken by mouth.

Procaine benzylpenicillin also known as penicillin G procaine, is an antibiotic useful for the treatment of a number of bacterial infections. Specifically it is used for syphilis, anthrax, mouth infections, pneumonia, diphtheria, cellulitis, and animal bites. It is given by injection into a muscle.

Ascaricides are drugs to treat ascariasis that is caused by infections with parasitic nematodes (roundworms) of the genus Ascaris. The large roundworm of pigs typically infects pigs while Ascaris lumbricoides affects human populations, typically in sub-tropical and tropical areas with poor sanitation. Ascaricides belong to the group of drugs collectively called anthelmintics which expel parasitic worms (helminths) and other internal parasites from the body by either stunning or killing them and without causing significant damage to the host.

<span class="mw-page-title-main">Pinworm infection</span> Medical condition

Pinworm infection, also known as enterobiasis, is a human parasitic disease caused by the pinworm, Enterobius vermicularis. The most common symptom is itching in the anal area. The period of time from swallowing eggs to the appearance of new eggs around the anus is 4 to 8 weeks. Some people who are infected do not have symptoms.

<span class="mw-page-title-main">Anthelmintic</span> Antiparasitic drugs that expel parasitic worms (helminths) from the body

Anthelmintics or antihelminthics are a group of antiparasitic drugs that expel parasitic worms (helminths) and other internal parasites from the body by either stunning or killing them and without causing significant damage to the host. They may also be called vermifuges or vermicides. Anthelmintics are used to treat people who are infected by helminths, a condition called helminthiasis. These drugs are also used to treat infected animals.

Sulfadoxine/pyrimethamine, sold under the brand name Fansidar, is a combination medication used to treat malaria. It contains sulfadoxine and pyrimethamine. For the treatment of malaria it is typically used along with other antimalarial medication such as artesunate. In areas of Africa with moderate to high rates of malaria, three doses are recommended during the second and third trimester of pregnancy.

<span class="mw-page-title-main">Soil-transmitted helminthiasis</span> Roundworm infection contracted from contaminated soil

Soil-transmitted helminthiasis is a type of worm infection (helminthiasis) caused by different species of roundworms. It is caused specifically by those worms which are transmitted through soil contaminated with faecal matter and are therefore called soil-transmitted helminths. Three types of soil-transmitted helminthiasis can be distinguished: ascariasis, hookworm infection and whipworm infection. These three types of infection are therefore caused by the large roundworm A. lumbricoides, the hookworms Necator americanus or Ancylostoma duodenale and by the whipworm Trichuris trichiura.

<i>Parascaris equorum</i> Species of roundworm

Parascaris equorum is a species of ascarid that is the equine roundworm. Amongst horse owners, the parasites are colloquially called "Ascarids". This is a host-specific helminth intestinal parasite that can infect horses, donkeys, and zebras. Horses up to six months of age are the most susceptible to infection. After this time, infection rates begin to decline and is extremely uncommon in horses over twelve months of age. It cannot infect humans or other animals. It is yellow-white in color, and females can become as large as 15 inches (38 cm) in length. Found worldwide, P. equorum is one of the most difficult equine parasites to kill, requiring larger doses of more powerful anthelmintic medications than are needed for other equine parasites.

<span class="mw-page-title-main">Mass deworming</span> Treating large numbers of people for helminthiasis and schistosomiasis

Mass deworming, is one of the preventive chemotherapy tools, used to treat large numbers of people, particularly children, for worm infections notably soil-transmitted helminthiasis, and schistosomiasis in areas with a high prevalence of these conditions. It involves treating everyone – often all children who attend schools, using existing infrastructure to save money – rather than testing first and then only treating selectively. Serious side effects have not been reported when administering the medication to those without worms, and testing for the infection is many times more expensive than treating it. Therefore, for the same amount of money, mass deworming can treat more people more cost-effectively than selective deworming. Mass deworming is one example of mass drug administration.

References

  1. Hamilton R (2015). Tarascon Pocket Pharmacopoeia 2015 Deluxe Lab-Coat Edition. Jones & Bartlett Learning. p. 54. ISBN   9781284057560.
  2. 1 2 3 4 5 6 World Health Organization (2009). Stuart MC, Kouimtzi M, Hill SR (eds.). WHO Model Formulary 2008. World Health Organization. pp. 89, 608. hdl: 10665/44053 . ISBN   9789241547659.
  3. "Pyrantel Use During Pregnancy". Drugs.com. Archived from the original on 20 December 2016. Retrieved 8 December 2016.
  4. 1 2 3 "Pyrantel Pamoate". The American Society of Health-System Pharmacists. Archived from the original on 20 December 2016. Retrieved 8 December 2016.
  5. 1 2 Maddison JE, Page SW, Church DB (2008). Small Animal Clinical Pharmacology. Elsevier Health Sciences. p. 209. ISBN   978-0702028588. Archived from the original on 2016-12-20.
  6. 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.
  7. Plumb DC (2005). Plumb's veterinary drug handbook. Stockholm, Wis: PharmaVet. ISBN   978-0-8138-0518-4.
  8. 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. PMID   9126759.