What it is used for
- Pinworm (threadworm) infection
- Roundworm infection
- Hookworm infection
How it works
Pyrantel paralyses the worms by locking up their muscles, so the still, paralysed worms lose their grip on the gut and are passed out naturally in the stool.
How it is taken
Taken as oral tablets, chewable tablets, or a liquid suspension, available over the counter in many countries. It can be taken with or without food, often as a single occasion that may be repeated after a couple of weeks. Take it exactly as the label, your doctor, or pharmacist directs.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Mild stomach upset or cramps
- Nausea
- Diarrhea
- Headache
- Dizziness
- Loss of appetite
Serious effects — get help
- Signs of a severe allergic reaction such as facial swelling or breathing difficulty — seek emergency care
- Severe or persistent vomiting — contact your clinician
- Severe abdominal pain — contact your clinician
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Piperazine (another worm treatment — these work against each other and should not be combined)
- Some medicines for myasthenia gravis
Who should take care
- Tell your clinician about liver disease before use
- For pinworm, treat household members and wash bedding and clothing to prevent reinfection
- Inform your clinician if pregnant or breastfeeding
- Check the right amount for young children with a pharmacist
- A repeat occasion after about two weeks is often advised for pinworm