Drug profile

The FDA adverse-event record for Lyme Vaccine

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

573
adverse-event reports
6.1%
death-coded share
Dog
most-reported species
177
Lack of efficacy (bacteria) - Borrelia - 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.
573
Total Reports
35
Deaths Reported
6.1%
Death Rate

Active Ingredients

Lyme Vaccine

Administration Routes

UnknownSubcutaneousParenteral

Species Affected

Dog 572
Unknown 1

Most Affected Breeds

Retriever - Labrador 83
Retriever - Golden 56
Crossbred Canine/dog 42
Shepherd Dog - German 26
Shepherd Dog - Australian 23
Beagle 15
Terrier (unspecified) 14
Terrier - Yorkshire 13
Shih Tzu 12
Boxer (German Boxer) 12

Most Reported Reactions

Lack of efficacy (bacteria) - Borrelia 177
Vomiting 112
Lack of efficacy (ectoparasite) - tick NOS 63
Other abnormal test result NOS 55
Lethargy (see also Central nervous system depression in 'Neurological') 49
Diarrhoea 44
Lethargy (see also Central nervous system depression in Neurological) 38
Emesis 26
Decreased appetite 24
Panting 23
Death by euthanasia 21
Behavioural disorder NOS 21

Outcome Breakdown

Ongoing
211 (36.9%)
Outcome Unknown
177 (30.9%)
Recovered/Normal
145 (25.3%)
Euthanized
21 (3.7%)
Died
14 (2.4%)
Recovered with Sequela
4 (0.7%)

Lyme Vaccine Adverse Event Insights

573 reports name Lyme Vaccine; 35 recorded a death outcome (6.1% of reported events, not a population-level mortality rate). Active ingredient: Lyme Vaccine. Administration routes: Unknown, Subcutaneous, Parenteral.

By species: Dog (572 reports), Unknown (1 reports). By breed: Retriever - Labrador (83), Retriever - Golden (56), Crossbred Canine/dog (42).

Leading clinical signs: Lack of efficacy (bacteria) - Borrelia (177), Vomiting (112), Lack of efficacy (ectoparasite) - tick NOS (63), Other abnormal test result NOS (55). Outcome, 572 coded reports: Ongoing leads at 36.9%.

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.