Drug profile

The FDA adverse-event record for Virbantel

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

10
adverse-event reports
0.0%
death-coded share
Dog
most-reported species
4
Lack of efficacy (endoparasite) - hookworm - 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.
10
Total Reports
0
Deaths Reported
0.0%
Death Rate

Active Ingredients

Virbantel

Administration Routes

OralUnknown

Species Affected

Dog 9
Cat 1

Most Affected Breeds

Beagle 2
Dog (unknown) 1
Domestic Shorthair 1
Hound (unspecified) 1
Dogue de Bordeaux 1
Bulldog 1
Mountain Dog - Bernese 1
Crossbred Canine/dog 1
Mastiff (unspecified) 1

Most Reported Reactions

Lack of efficacy (endoparasite) - hookworm 4
Lack of efficacy (endoparasite) - roundworm NOS 3
Injection site pain 1
Injection site abscess 1
Ataxia 1
Head tilt - neurological disorder (see also Head tilt - ear disorder) 1
Low platelet count 1
Eosinopenia 1
Elevated serum alkaline phosphatase (SAP) 1
Fever 1
Proteinuria 1
Hyposthenuria 1

Outcome Breakdown

Ongoing
8 (80.0%)
Outcome Unknown
2 (20.0%)

Virbantel Adverse Event Insights

10 reports name Virbantel; 0 recorded a death outcome (0.0% of reported events, not a population-level mortality rate). Active ingredient: Virbantel. Administration routes: Oral, Unknown.

By species: Dog (9 reports), Cat (1 reports). By breed: Beagle (2), Dog (unknown) (1), Domestic Shorthair (1).

Leading clinical signs: Lack of efficacy (endoparasite) - hookworm (4), Lack of efficacy (endoparasite) - roundworm NOS (3), Injection site pain (1), Injection site abscess (1). Outcome, 10 coded reports: Ongoing leads at 80.0%.

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.