Pyrantel Pamoate (Strongid)

Pyrantel Pamoate

(Strongid, Nemex)
By Dr. Karen Burgess

Brand name and formulations

  • Pyrantel pamoate (generic formula)
  • Strongid, Nemex, Virbantel (brand name animal formula)
  • Tablet, Liquid

What is pyrantel?
Pyrantel is an antiparasitic known for its efficacy against roundworms, hookworms, and stomach worm. The drug paralyzes the parasite thereby causing it to release from a pet’s intestine and be passed naturally with fecal matter.

How is pyrantel given?
Pyrantel is typically prescribed as a single dose medication.

How should pyrantel be stored?
Store at room temperature and protected from light.

What side effects are associated with pyrantel?
Vomiting may occur after treatment with pyrantel. Worms may be seen visually passing in stool or in vomitus.

What drugs should not be given with pyrantel?
There are no specific drug interactions of major concern.

What follow up is necessary with pyrantel use?
Pyrantel only treats adult worms leaving immature migrating worms behind. Follow up dosing is recommended at two week intervals for a total of two to three doses. Prevention of future re-exposure is recommended via monthly heartworm preventative administration. Follow up fecal examination is recommended a week after treatment is completed.