Drug profile

The FDA adverse-event record for Proin

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

227
adverse-event reports
15.0%
death-coded share
Dog
most-reported species
32
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.
227
Total Reports
34
Deaths Reported
15.0%
Death Rate

Active Ingredients

Proin

Administration Routes

OralUnknownTopical

Species Affected

Dog 225
Cat 2

Most Affected Breeds

Retriever - Labrador 44
Shepherd Dog - German 15
Crossbred Canine/dog 14
Shepherd Dog - Australian 11
Doberman Pinscher 8
Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog) 8
Siberian Husky 7
Collie - Border 7
Deutsche Dogge, Great Dane 7
Spaniel (unspecified) 5

Most Reported Reactions

Vomiting 32
Urinary incontinence 32
Polydipsia 31
Death by euthanasia 26
Polyuria 26
Lethargy (see also Central nervous system depression in Neurological) 26
Ataxia 23
Not eating 22
Diarrhoea 19
Seizure NOS 18
Decreased appetite 18
Panting 14

Outcome Breakdown

Ongoing
134 (59.0%)
Recovered/Normal
39 (17.2%)
Euthanized
26 (11.5%)
Outcome Unknown
19 (8.4%)
Died
8 (3.5%)
Recovered with Sequela
1 (0.4%)

Proin Adverse Event Insights

227 reports name Proin; 34 recorded a death outcome (15.0% of reported events, not a population-level mortality rate). Active ingredient: Proin. Administration routes: Oral, Unknown, Topical.

By species: Dog (225 reports), Cat (2 reports). By breed: Retriever - Labrador (44), Shepherd Dog - German (15), Crossbred Canine/dog (14).

Leading clinical signs: Vomiting (32), Urinary incontinence (32), Polydipsia (31), Death by euthanasia (26). Outcome, 227 coded reports: Ongoing 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.