Drug profile

The FDA adverse-event record for Clonazepam

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

22
adverse-event reports
0.0%
death-coded share
Dog
most-reported species
7
Accidental exposure - 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.
22
Total Reports
0
Deaths Reported
0.0%
Death Rate

Active Ingredients

Clonazepam

Administration Routes

UnknownOral

Species Affected

Dog 11
Human 9
Cat 2

Most Affected Breeds

Unknown 9
Crossbred Canine/dog 2
Retriever - Labrador 2
Domestic Shorthair 2
Maltese 2
Collie - Border 1
Terrier (unspecified) 1
Chihuahua 1
Portuguese Water Dog 1
Shepherd Dog - Australian 1

Most Reported Reactions

Accidental exposure 7
Lethargy (see also Central nervous system depression in 'Neurological') 4
Diarrhoea 4
Stomach upset 2
Fever 2
Pain NOS 2
Localised itching 2
Nausea 2
Other abnormal test result NOS 2
Hyperglycaemia 2
Drooling 2
Lethargy (see also Central nervous system depression in Neurological) 2

Outcome Breakdown

Recovered/Normal
12 (54.5%)
Outcome Unknown
9 (40.9%)
Ongoing
1 (4.5%)

Clonazepam Adverse Event Insights

22 reports name Clonazepam; 0 recorded a death outcome (0.0% of reported events, not a population-level mortality rate). Active ingredient: Clonazepam. Administration routes: Unknown, Oral.

By species: Dog (11 reports), Human (9 reports), Cat (2 reports). By breed: Unknown (9), Crossbred Canine/dog (2), Retriever - Labrador (2).

Leading clinical signs: Accidental exposure (7), Lethargy (see also Central nervous system depression in 'Neurological') (4), Diarrhoea (4), Stomach upset (2). Outcome, 22 coded reports: Recovered/Normal leads at 54.5%.

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.