Drug profile

The FDA adverse-event record for Tiletamine, Zolazepam

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

267
adverse-event reports
28.8%
death-coded share
Dog
most-reported species
51
INEFFECTIVE, ANESTHESIA - 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.
267
Total Reports
77
Deaths Reported
28.8%
Death Rate

Active Ingredients

Tiletamine, Zolazepam

Administration Routes

IntramuscularIntravenousUnknownSubcutaneousTopicalOtherOphthalmic

Species Affected

Dog 117
Cat 116
Unknown 25
Human 4
Other Deer 2
Other 2
Chimpanzee 1

Most Affected Breeds

Domestic (unspecified) 73
Cat (unknown) 35
Unknown 34
Dog (unknown) 32
Crossbred Canine/dog 13
Mixed (Dog) 9
Retriever - Labrador 8
Boxer (German Boxer) 5
Shepherd Dog - German 4
Pug 3

Most Reported Reactions

INEFFECTIVE, ANESTHESIA 51
Death 48
Cardiac arrest 30
Apnoea 28
Death by euthanasia 25
Fever 24
Vomiting 21
Vocalisation 20
Depression 19
Solution, Abnormal 19
Anorexia 18
Hyperexcitation 13

Outcome Breakdown

Died
75 (89.3%)
Recovered/Normal
5 (6.0%)
Euthanized
2 (2.4%)
Outcome Unknown
1 (1.2%)
Ongoing
1 (1.2%)

Tiletamine, Zolazepam Adverse Event Insights

267 reports name Tiletamine, Zolazepam; 77 recorded a death outcome (28.8% of reported events, not a population-level mortality rate). Active ingredient: Tiletamine, Zolazepam. Administration routes: Intramuscular, Intravenous, Unknown, Subcutaneous.

By species: Dog (117 reports), Cat (116 reports), Unknown (25 reports). By breed: Domestic (unspecified) (73), Cat (unknown) (35), Unknown (34).

Leading clinical signs: INEFFECTIVE, ANESTHESIA (51), Death (48), Cardiac arrest (30), Apnoea (28). Outcome, 84 coded reports: Died leads at 89.3%.

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.