Pharmacology: Anti helminthic drugs flashcards
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Transcript of Pharmacology: Anti helminthic drugs flashcards
![Page 1: Pharmacology: Anti helminthic drugs flashcards](https://reader038.fdocuments.us/reader038/viewer/2022100517/5576dbc8d8b42a87588b4d01/html5/thumbnails/1.jpg)
Anti-Helminthic Drugs
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General All orally administered
• Except for Thiabendazole (orally and topically)
Dosage and length tx depends on drug, [drug], and worm burden
Many of these drugs are completely effective in 1 – 2 doses given in 1 – 2 days
All contraindicated in pregnancy; caution with children
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Mechanisms of Action Piperazine = blocks ACh action
Pyrantel Pamoate & Metrifonate = induce ACh release; inhibit AChE
Praziquantel = increases helminth cell membrane permeability to Ca2+
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Mechanisms of Action Bithionol = inhibits helminthic
anaerobic metabolism
Diethylcarbamazine Citrate (DEC) = inhibits arachidonic acid metabolism
Benzimidazoles = inhibit helminth microtubule polymerization
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Mechanisms of Action Niclosamide = inhibits oxidative
phosphorylation
Ivermectin = stimulates GABA – mediated peripheral nerve signals
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Drugs of Choice Ascariasis (Roundworm), Enterobiasis
(Pinworm), Necator Americanus & Ancylostoma Duodenale (Hookworm), Trichiuriasis (Whipworm disease)• Albendazole/Mebendazole
Clonorchiasis (oriental liver fluke)• Praziquantel
Cutaneous Larva Migrans (creeping eruption)• Albendazole, Ivermectin
Diphyllobothriasis (fish tapeworm), Teniasis (Pork/Beef tapeworm)• Praziquantel, Niclosamide
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Drugs of Choice Dracunculiasis; Giardiasis;
Entemoeba; trichomoniasis• Metronidazole
Filariasis (elephantiasis)• Diethylcarbamazine Citrate (DEC)
Onchocerciasis (River blindness), Strongyloidiasis (Threadworm disease)• Ivermectin
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