Drug profile

The FDA adverse-event record for Unknown Vaccines

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

108
adverse-event reports
11.1%
death-coded share
Dog
most-reported species
25
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.
108
Total Reports
12
Deaths Reported
11.1%
Death Rate

Active Ingredients

Unknown Vaccines

Administration Routes

UnknownSubcutaneousSubconjunctival

Species Affected

Dog 87
Cat 20
Cattle 1

Most Affected Breeds

Domestic Shorthair 10
Retriever - Labrador 9
Retriever - Golden 7
Chihuahua 6
Dog (unknown) 6
Crossbred Canine/dog 4
Maltese 3
Pit Bull 3
Cat (unknown) 3
Terrier - Jack Russell 3

Most Reported Reactions

Vomiting 25
Lethargy (see also Central nervous system depression in 'Neurological') 15
Diarrhoea 13
Lethargy (see also Central nervous system depression in Neurological) 12
Panting 7
Emesis (multiple) 7
Death by euthanasia 6
Other abnormal test result NOS 6
Death 6
Anorexia 6
Pruritus 5
Behavioural disorder NOS 5

Outcome Breakdown

Outcome Unknown
38 (35.2%)
Recovered/Normal
36 (33.3%)
Ongoing
22 (20.4%)
Euthanized
6 (5.6%)
Died
6 (5.6%)

Unknown Vaccines Adverse Event Insights

108 reports name Unknown Vaccines; 12 recorded a death outcome (11.1% of reported events, not a population-level mortality rate). Active ingredient: Unknown Vaccines. Administration routes: Unknown, Subcutaneous, Subconjunctival.

By species: Dog (87 reports), Cat (20 reports), Cattle (1 reports). By breed: Domestic Shorthair (10), Retriever - Labrador (9), Retriever - Golden (7).

Leading clinical signs: Vomiting (25), Lethargy (see also Central nervous system depression in 'Neurological') (15), Diarrhoea (13), Lethargy (see also Central nervous system depression in Neurological) (12). Outcome, 108 coded reports: Outcome Unknown leads at 35.2%.

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.