Drug profile

The FDA adverse-event record for Epsiprantel

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

319
adverse-event reports
4.7%
death-coded share
Dog
most-reported species
149
Lack of efficacy (endoparasite) - tapeworm - 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.
319
Total Reports
15
Deaths Reported
4.7%
Death Rate

Active Ingredients

Epsiprantel

Administration Routes

OralUnknownParenteralOther

Species Affected

Dog 222
Cat 93
Unknown 3
Human 1

Most Affected Breeds

Domestic Shorthair 54
Crossbred Canine/dog 19
Retriever - Labrador 19
Dog (unknown) 13
Chihuahua 12
Terrier - Yorkshire 9
Spitz - German Pomeranian 9
Cat (unknown) 8
Retriever - Golden 8
Shih Tzu 7

Most Reported Reactions

Lack of efficacy (endoparasite) - tapeworm 149
Vomiting 59
Emesis 26
Lethargy (see also Central nervous system depression in 'Neurological') 23
Overdose 23
Lack of efficacy - NOS 19
Lack of efficacy (tapeworm) 19
Anorexia 18
Diarrhoea 15
Death 9
Lack of efficacy (ectoparasite) - flea 9
Ataxia 8

Outcome Breakdown

Ongoing
114 (40.0%)
Outcome Unknown
79 (27.7%)
Recovered/Normal
75 (26.3%)
Died
12 (4.2%)
Euthanized
3 (1.1%)
Recovered with Sequela
2 (0.7%)

Epsiprantel Adverse Event Insights

319 reports name Epsiprantel; 15 recorded a death outcome (4.7% of reported events, not a population-level mortality rate). Active ingredient: Epsiprantel. Administration routes: Oral, Unknown, Parenteral, Other.

By species: Dog (222 reports), Cat (93 reports), Unknown (3 reports). By breed: Domestic Shorthair (54), Crossbred Canine/dog (19), Retriever - Labrador (19).

Leading clinical signs: Lack of efficacy (endoparasite) - tapeworm (149), Vomiting (59), Emesis (26), Lethargy (see also Central nervous system depression in 'Neurological') (23). Outcome, 285 coded reports: Ongoing leads at 40.0%.

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.