Drug profile

The FDA adverse-event record for Cephalexin Anhydrous

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

17
adverse-event reports
11.8%
death-coded share
Dog
most-reported species
4
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.
17
Total Reports
2
Deaths Reported
11.8%
Death Rate

Active Ingredients

Cephalexin Anhydrous

Administration Routes

UnknownOral

Species Affected

Dog 12
Unknown 5

Most Affected Breeds

Unknown 5
Retriever - Labrador 3
Siberian Husky 1
Retriever - Golden 1
Weimaraner 1
Shepherd Dog - German 1
Spaniel - Cocker American 1
Terrier - Airedale 1
Terrier - Cairn 1
Chihuahua 1

Most Reported Reactions

Vomiting 4
Lack of efficacy - NOS 2
INEFFECTIVE, LOSS OF EFFECT 2
Odor, Abnormal 2
Diarrhoea 2
Death by euthanasia 2
Lethargy (see also Central nervous system depression in 'Neurological') 2
Seal, Abnormal 2
UNPALATABLE 2
Contamination NOS 2
Flaking skin 1
Drug prescribing error 1

Outcome Breakdown

Recovered/Normal
5 (41.7%)
Ongoing
5 (41.7%)
Euthanized
2 (16.7%)

Cephalexin Anhydrous Adverse Event Insights

17 reports name Cephalexin Anhydrous; 2 recorded a death outcome (11.8% of reported events, not a population-level mortality rate). Active ingredient: Cephalexin Anhydrous. Administration routes: Unknown, Oral.

By species: Dog (12 reports), Unknown (5 reports). By breed: Unknown (5), Retriever - Labrador (3), Siberian Husky (1).

Leading clinical signs: Vomiting (4), Lack of efficacy - NOS (2), INEFFECTIVE, LOSS OF EFFECT (2), Odor, Abnormal (2). Outcome, 12 coded reports: Recovered/Normal leads at 41.7%.

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.