Drug profile

The FDA adverse-event record for Unknown Antibiotic

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

131
adverse-event reports
15.3%
death-coded share
Dog
most-reported species
24
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.
131
Total Reports
20
Deaths Reported
15.3%
Death Rate

Active Ingredients

Unknown Antibiotic

Administration Routes

UnknownOralSubcutaneous

Species Affected

Dog 88
Cat 39
Human 1
Cattle 1
Horse 1
Goat 1

Most Affected Breeds

Domestic Shorthair 21
Crossbred Canine/dog 13
Retriever - Labrador 11
Retriever - Golden 7
Domestic Longhair 6
Shih Tzu 3
Sheepdog - Shetland 3
Boxer (German Boxer) 3
Cat (unknown) 3
Domestic Mediumhair 3

Most Reported Reactions

Vomiting 24
Lethargy (see also Central nervous system depression in 'Neurological') 23
Death by euthanasia 14
Anorexia 14
Diarrhoea 13
Other abnormal test result NOS 11
Weight loss 10
Pruritus 9
Skin lesion NOS 7
Inappetence 7
Lack of efficacy - NOS 6
Pneumonia 6

Outcome Breakdown

Outcome Unknown
45 (34.4%)
Recovered/Normal
34 (26.0%)
Ongoing
31 (23.7%)
Euthanized
14 (10.7%)
Died
6 (4.6%)
Recovered with Sequela
1 (0.8%)

Unknown Antibiotic Adverse Event Insights

131 reports name Unknown Antibiotic; 20 recorded a death outcome (15.3% of reported events, not a population-level mortality rate). Active ingredient: Unknown Antibiotic. Administration routes: Unknown, Oral, Subcutaneous.

By species: Dog (88 reports), Cat (39 reports), Human (1 reports). By breed: Domestic Shorthair (21), Crossbred Canine/dog (13), Retriever - Labrador (11).

Leading clinical signs: Vomiting (24), Lethargy (see also Central nervous system depression in 'Neurological') (23), Death by euthanasia (14), Anorexia (14). Outcome, 131 coded reports: Outcome Unknown leads at 34.4%.

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.