Drug profile

The FDA adverse-event record for Strongid

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

27
adverse-event reports
3.7%
death-coded share
Dog
most-reported species
8
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.
27
Total Reports
1
Deaths Reported
3.7%
Death Rate

Active Ingredients

Strongid

Administration Routes

UnknownOral

Species Affected

Dog 18
Cat 9

Most Affected Breeds

Domestic Shorthair 5
Maltese 3
Crossbred Canine/dog 2
Spaniel - Cocker English 2
Lhasa Apso 1
Beagle 1
Retriever - Labrador 1
Chihuahua 1
Cat (unknown) 1
Dog (unknown) 1

Most Reported Reactions

Lack of efficacy (endoparasite) - hookworm 8
Lack of efficacy (endoparasite) - roundworm NOS 4
Lethargy (see also Central nervous system depression in 'Neurological') 3
Fever 3
Diarrhoea 2
Laboured breathing 2
Ataxia 2
Vomiting 2
Unsteady gait 2
Not eating 2
Blindness 1
Mydriasis 1

Outcome Breakdown

Ongoing
12 (44.4%)
Outcome Unknown
7 (25.9%)
Recovered/Normal
6 (22.2%)
Recovered with Sequela
1 (3.7%)
Died
1 (3.7%)

Strongid Adverse Event Insights

27 reports name Strongid; 1 recorded a death outcome (3.7% of reported events, not a population-level mortality rate). Active ingredient: Strongid. Administration routes: Unknown, Oral.

By species: Dog (18 reports), Cat (9 reports). By breed: Domestic Shorthair (5), Maltese (3), Crossbred Canine/dog (2).

Leading clinical signs: Lack of efficacy (endoparasite) - hookworm (8), Lack of efficacy (endoparasite) - roundworm NOS (4), Lethargy (see also Central nervous system depression in 'Neurological') (3), Fever (3). Outcome, 27 coded reports: Ongoing leads at 44.4%.

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.