Drug profile

The FDA adverse-event record for Smz-Tmp

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

25
adverse-event reports
40.0%
death-coded share
Dog
most-reported species
8
Lethargy (see also Central nervous system depression in 'Neurological') - 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.
25
Total Reports
10
Deaths Reported
40.0%
Death Rate

Active Ingredients

Smz-Tmp

Administration Routes

UnknownOral

Species Affected

Dog 23
Horse 2

Most Affected Breeds

Retriever - Labrador 4
Retriever - Golden 3
Shepherd Dog - German 3
Bulldog - French 2
Warmblood (unspecified) 2
Mountain Dog - Bernese 1
Boxer (German Boxer) 1
Deutsche Dogge, Great Dane 1
Crossbred Canine/dog 1
Saint Bernard Dog 1

Most Reported Reactions

Lethargy (see also Central nervous system depression in 'Neurological') 8
Other abnormal test result NOS 7
Weight loss 6
Thrombocytopenia 5
Death 5
Elevated blood urea nitrogen (BUN) 5
Elevated creatinine 5
Elevated total bilirubin 4
Death by euthanasia 4
Hypoalbuminaemia 4
Seizure NOS 3
Hyperphosphataemia 3

Outcome Breakdown

Ongoing
11 (42.3%)
Died
7 (26.9%)
Euthanized
4 (15.4%)
Recovered/Normal
3 (11.5%)
Outcome Unknown
1 (3.8%)

Smz-Tmp Adverse Event Insights

25 reports name Smz-Tmp; 10 recorded a death outcome (40.0% of reported events, not a population-level mortality rate). Active ingredient: Smz-Tmp. Administration routes: Unknown, Oral.

By species: Dog (23 reports), Horse (2 reports). By breed: Retriever - Labrador (4), Retriever - Golden (3), Shepherd Dog - German (3).

Leading clinical signs: Lethargy (see also Central nervous system depression in 'Neurological') (8), Other abnormal test result NOS (7), Weight loss (6), Thrombocytopenia (5). Outcome, 26 coded reports: Ongoing leads at 42.3%.

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.