Drug profile

The FDA adverse-event record for Lepto Vaccine

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

453
adverse-event reports
9.3%
death-coded share
Dog
most-reported species
146
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.
453
Total Reports
42
Deaths Reported
9.3%
Death Rate

Active Ingredients

Lepto Vaccine

Administration Routes

UnknownParenteralSubcutaneousIntra-ArterialOral

Species Affected

Dog 453

Most Affected Breeds

Retriever - Labrador 64
Retriever - Golden 25
Shepherd Dog - German 22
Boxer (German Boxer) 22
Crossbred Canine/dog 20
Shih Tzu 19
Pit Bull 15
Shepherd Dog - Australian 12
Dachshund (unspecified) 12
Bulldog - French 12

Most Reported Reactions

Vomiting 146
Emesis 89
Lethargy (see also Central nervous system depression in 'Neurological') 81
Diarrhoea 67
Other abnormal test result NOS 34
Seizure NOS 32
Lack of efficacy - NOS 25
Decreased appetite 24
Behavioural disorder NOS 22
Death 21
Not eating 21
Shaking 20

Outcome Breakdown

Recovered/Normal
217 (47.9%)
Outcome Unknown
99 (21.9%)
Ongoing
75 (16.6%)
Died
23 (5.1%)
Recovered with Sequela
20 (4.4%)
Euthanized
19 (4.2%)

Lepto Vaccine Adverse Event Insights

453 reports name Lepto Vaccine; 42 recorded a death outcome (9.3% of reported events, not a population-level mortality rate). Active ingredient: Lepto Vaccine. Administration routes: Unknown, Parenteral, Subcutaneous, Intra-Arterial.

By species: Dog (453 reports). By breed: Retriever - Labrador (64), Retriever - Golden (25), Shepherd Dog - German (22).

Leading clinical signs: Vomiting (146), Emesis (89), Lethargy (see also Central nervous system depression in 'Neurological') (81), Diarrhoea (67). Outcome, 453 coded reports: Recovered/Normal leads at 47.9%.

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.