Drug profile

The FDA adverse-event record for Unknown Dewormer

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

40
adverse-event reports
15.0%
death-coded share
Dog
most-reported species
7
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.
40
Total Reports
6
Deaths Reported
15.0%
Death Rate

Active Ingredients

Unknown Dewormer

Administration Routes

UnknownOral

Species Affected

Dog 28
Cat 7
Cattle 5

Most Affected Breeds

Domestic Shorthair 5
Shepherd Dog - German 5
Retriever - Labrador 3
Aberdeen Angus 2
Chihuahua 2
Retriever - Golden 2
Siberian Husky 2
Crossbred Canine/dog 2
Cattle (other) 2
Pit Bull 1

Most Reported Reactions

Vomiting 7
Death 6
Lack of efficacy (ectoparasite) - flea 5
Lack of efficacy (endoparasite) - tapeworm 5
Not eating 5
Lack of efficacy - NOS 4
Overdose 3
Lethargy (see also Central nervous system depression in 'Neurological') 3
Fever 3
Other abnormal test result NOS 2
Drug administration error 2
Anorexia 2

Outcome Breakdown

Outcome Unknown
18 (41.9%)
Recovered/Normal
14 (32.6%)
Died
6 (14.0%)
Ongoing
5 (11.6%)

Unknown Dewormer Adverse Event Insights

40 reports name Unknown Dewormer; 6 recorded a death outcome (15.0% of reported events, not a population-level mortality rate). Active ingredient: Unknown Dewormer. Administration routes: Unknown, Oral.

By species: Dog (28 reports), Cat (7 reports), Cattle (5 reports). By breed: Domestic Shorthair (5), Shepherd Dog - German (5), Retriever - Labrador (3).

Leading clinical signs: Vomiting (7), Death (6), Lack of efficacy (ectoparasite) - flea (5), Lack of efficacy (endoparasite) - tapeworm (5). Outcome, 43 coded reports: Outcome Unknown leads at 41.9%.

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.