Drug profile

The FDA adverse-event record for Tiletamine Hcl;Zolazapam Hcl

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

300
adverse-event reports
24.0%
death-coded share
Dog
most-reported species
72
Lack of efficacy - NOS - 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.
300
Total Reports
72
Deaths Reported
24.0%
Death Rate

Active Ingredients

Tiletamine Hcl;Zolazapam Hcl

Administration Routes

IntramuscularUnknownIntravenousSubcutaneousOphthalmicOralOther

Species Affected

Dog 146
Cat 105
Unknown 35
Human 6
Monkey 2
Horse 2
Other 1
Tiger 1
Pig 1
Bear 1

Most Affected Breeds

Domestic Shorthair 59
Unknown 46
Dog (unknown) 39
Cat (other) 33
Retriever - Labrador 12
Terrier - Bull - American Pit 10
Shepherd Dog - German 6
Domestic Mediumhair 6
Terrier - Yorkshire 5
Terrier (unspecified) 5

Most Reported Reactions

Lack of efficacy - NOS 72
Death 41
Unrelated death 19
Cardiac arrest 18
Ataxia 17
Lethargy (see also Central nervous system depression in 'Neurological') 16
Recovery prolonged 16
Vomiting 15
Color, Abnormal 13
Bradycardia 13
Cyanosis 13
Tachycardia 12

Outcome Breakdown

Recovered/Normal
96 (35.8%)
Ongoing
77 (28.7%)
Died
44 (16.4%)
Euthanized
28 (10.4%)
Outcome Unknown
23 (8.6%)

Tiletamine Hcl;Zolazapam Hcl Adverse Event Insights

300 reports name Tiletamine Hcl;Zolazapam Hcl; 72 recorded a death outcome (24.0% of reported events, not a population-level mortality rate). Active ingredient: Tiletamine Hcl;Zolazapam Hcl. Administration routes: Intramuscular, Unknown, Intravenous, Subcutaneous.

By species: Dog (146 reports), Cat (105 reports), Unknown (35 reports). By breed: Domestic Shorthair (59), Unknown (46), Dog (unknown) (39).

Leading clinical signs: Lack of efficacy - NOS (72), Death (41), Unrelated death (19), Cardiac arrest (18). Outcome, 268 coded reports: Recovered/Normal leads at 35.8%.

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.