Drug profile

The FDA adverse-event record for Antibiotic (Unknown)

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

825
adverse-event reports
7.5%
death-coded share
Dog
most-reported species
210
Emesis - top reaction
Verify with FDA CVM →
Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
825
Total Reports
62
Deaths Reported
7.5%
Death Rate

Active Ingredients

Antibiotic (Unknown)

Administration Routes

UnknownOralParenteralTopicalSubcutaneousIntravenousOphthalmicAuricular (Otic)

Species Affected

Dog 656
Cat 160
Human 4
Cattle 3
Chicken 1
Pig 1

Most Affected Breeds

Domestic Shorthair 89
Retriever - Labrador 81
Pit Bull 32
Shih Tzu 31
Crossbred Canine/dog 31
Cat (unknown) 26
Dog (unknown) 24
Boxer (German Boxer) 23
Shepherd Dog - German 22
Chihuahua 22

Most Reported Reactions

Emesis 210
Vomiting 128
Lethargy (see also Central nervous system depression in 'Neurological') 102
Lack of efficacy - NOS 85
Lack of efficacy (ectoparasite) - flea 58
Diarrhoea 55
Not eating 52
Behavioural disorder NOS 43
Other abnormal test result NOS 38
Decreased appetite 34
Weight loss 34
Death by euthanasia 32

Outcome Breakdown

Recovered/Normal
326 (39.5%)
Outcome Unknown
231 (28.0%)
Ongoing
154 (18.6%)
Recovered with Sequela
53 (6.4%)
Euthanized
32 (3.9%)
Died
30 (3.6%)

Antibiotic (Unknown) Adverse Event Insights

825 reports name Antibiotic (Unknown); 62 recorded a death outcome (7.5% of reported events, not a population-level mortality rate). Active ingredient: Antibiotic (Unknown). Administration routes: Unknown, Oral, Parenteral, Topical.

By species: Dog (656 reports), Cat (160 reports), Human (4 reports). By breed: Domestic Shorthair (89), Retriever - Labrador (81), Pit Bull (32).

Leading clinical signs: Emesis (210), Vomiting (128), Lethargy (see also Central nervous system depression in 'Neurological') (102), Lack of efficacy - NOS (85). Outcome, 826 coded reports: Recovered/Normal leads at 39.5%.

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.