Drug profile

The FDA adverse-event record for Canine Leptospira Vaccine

21 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Canine Leptospira Vaccine. See the species affected, top reactions, and outcomes below.

21
adverse-event reports
19.0%
death-coded share
Dog
most-reported species
4
Seizure NOS - 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.
21
Total Reports
4
Deaths Reported
19.0%
Death Rate

Active Ingredients

Canine Leptospira Vaccine

Administration Routes

UnknownParenteralSubcutaneous

Species Affected

Dog 21

Most Affected Breeds

Retriever - Labrador 6
Siberian Husky 2
Terrier - Jack Russell 2
Spaniel - King Charles Cavalier 2
Maltese 1
Spaniel - Springer English 1
Chihuahua 1
Terrier (unspecified) 1
Hound - Basset 1
Shepherd Dog - Australian 1

Most Reported Reactions

Seizure NOS 4
Vomiting 4
Other abnormal test result NOS 3
Pain NOS 3
Not eating 3
Lack of efficacy (endoparasite) - heartworm 3
Panting 2
Decreased appetite 2
Abnormal menace reflex test 2
Weight loss 2
Diarrhoea 2
Lethargy (see also Central nervous system depression in 'Neurological') 2

Outcome Breakdown

Outcome Unknown
9 (42.9%)
Recovered/Normal
5 (23.8%)
Died
3 (14.3%)
Ongoing
3 (14.3%)
Euthanized
1 (4.8%)

Canine Leptospira Vaccine Adverse Event Insights

21 reports name Canine Leptospira Vaccine; 4 recorded a death outcome (19.0% of reported events, not a population-level mortality rate). Active ingredient: Canine Leptospira Vaccine. Administration routes: Unknown, Parenteral, Subcutaneous.

By species: Dog (21 reports). By breed: Retriever - Labrador (6), Siberian Husky (2), Terrier - Jack Russell (2).

Leading clinical signs: Seizure NOS (4), Vomiting (4), Other abnormal test result NOS (3), Pain NOS (3). Outcome, 21 coded reports: Outcome Unknown leads at 42.9%.

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.