Drug profile

The FDA adverse-event record for Probiotic

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

589
adverse-event reports
14.6%
death-coded share
Dog
most-reported species
168
Diarrhoea - 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.
589
Total Reports
86
Deaths Reported
14.6%
Death Rate

Active Ingredients

Probiotic

Administration Routes

OralUnknownTopicalIntramuscularOther

Species Affected

Dog 487
Cat 93
Horse 6
Cattle 2
Human 1

Most Affected Breeds

Domestic Shorthair 60
Retriever - Labrador 56
Retriever - Golden 27
Crossbred Canine/dog 25
Shepherd Dog - German 23
Terrier - Yorkshire 19
Chihuahua 16
Shih Tzu 13
Boxer (German Boxer) 11
Domestic Longhair 11

Most Reported Reactions

Diarrhoea 168
Vomiting 137
Lethargy (see also Central nervous system depression in 'Neurological') 83
Anorexia 64
Weight loss 57
Lethargy (see also Central nervous system depression in Neurological) 57
Other abnormal test result NOS 56
Death by euthanasia 55
Not eating 47
Decreased appetite 46
Lack of efficacy - NOS 46
Elevated alanine aminotransferase (ALT) 43

Outcome Breakdown

Ongoing
238 (40.4%)
Outcome Unknown
133 (22.6%)
Recovered/Normal
130 (22.1%)
Euthanized
54 (9.2%)
Died
32 (5.4%)
Recovered with Sequela
2 (0.3%)

Probiotic Adverse Event Insights

589 reports name Probiotic; 86 recorded a death outcome (14.6% of reported events, not a population-level mortality rate). Active ingredient: Probiotic. Administration routes: Oral, Unknown, Topical, Intramuscular.

By species: Dog (487 reports), Cat (93 reports), Horse (6 reports). By breed: Domestic Shorthair (60), Retriever - Labrador (56), Retriever - Golden (27).

Leading clinical signs: Diarrhoea (168), Vomiting (137), Lethargy (see also Central nervous system depression in 'Neurological') (83), Anorexia (64). Outcome, 589 coded reports: Ongoing leads at 40.4%.

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.