Drug profile

The FDA adverse-event record for Pyrantel, Praziquantel

39 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Pyrantel, Praziquantel. See the species affected, top reactions, and outcomes below.

39
adverse-event reports
7.7%
death-coded share
Dog
most-reported species
11
Vomiting - top reaction
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Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
39
Total Reports
3
Deaths Reported
7.7%
Death Rate

Active Ingredients

Pyrantel, Praziquantel

Administration Routes

OralUnknown

Species Affected

Dog 26
Cat 13

Most Affected Breeds

Domestic Shorthair 10
Dog (unknown) 5
Retriever - Labrador 3
Chihuahua 3
Cat (unknown) 3
Poodle (unspecified) 2
Coonhound - Treeing Walker 1
Siberian Husky 1
Shepherd (unspecified) 1
Pointing Dog - German Short-haired 1

Most Reported Reactions

Vomiting 11
Lack of efficacy (endoparasite) - tapeworm 8
Diarrhoea 7
Agitation 4
Emesis (multiple) 3
Lack of efficacy (ectoparasite) - flea 3
Lack of efficacy (endoparasite) - hookworm 3
Vocalisation 3
Inappropriate urination 3
Lethargy (see also Central nervous system depression in 'Neurological') 3
Shaking 3
Death 3

Outcome Breakdown

Outcome Unknown
23 (59.0%)
Ongoing
7 (17.9%)
Recovered/Normal
6 (15.4%)
Died
3 (7.7%)

Pyrantel, Praziquantel Adverse Event Insights

39 reports name Pyrantel, Praziquantel; 3 recorded a death outcome (7.7% of reported events, not a population-level mortality rate). Active ingredient: Pyrantel, Praziquantel. Administration routes: Oral, Unknown.

By species: Dog (26 reports), Cat (13 reports). By breed: Domestic Shorthair (10), Dog (unknown) (5), Retriever - Labrador (3).

Leading clinical signs: Vomiting (11), Lack of efficacy (endoparasite) - tapeworm (8), Diarrhoea (7), Agitation (4). Outcome, 39 coded reports: Outcome Unknown leads at 59.0%.

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. This page draws directly on FDA openFDA data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.