Drug profile

The FDA adverse-event record for Mirtazipine

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

42
adverse-event reports
40.5%
death-coded share
Dog
most-reported species
12
Anorexia - 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.
42
Total Reports
17
Deaths Reported
40.5%
Death Rate

Active Ingredients

Mirtazipine

Administration Routes

OralUnknownTopical

Species Affected

Dog 23
Cat 19

Most Affected Breeds

Domestic Shorthair 12
Crossbred Canine/dog 5
Schnauzer - Miniature 3
Collie (unspecified) 3
Terrier - Yorkshire 2
Retriever - Labrador 2
Domestic Mediumhair 2
Crossbred Feline/cat 1
Sheepdog - Shetland 1
Poodle - Standard 1

Most Reported Reactions

Anorexia 12
Death by euthanasia 10
Vomiting 9
Weight loss 9
Death 7
Lethargy (see also Central nervous system depression in Neurological) 6
Lethargy (see also Central nervous system depression in 'Neurological') 5
Diarrhoea 5
Other abnormal test result NOS 4
Elevated blood urea nitrogen (BUN) 4
Decreased appetite 4
Polydipsia 4

Outcome Breakdown

Ongoing
11 (26.2%)
Euthanized
10 (23.8%)
Recovered/Normal
8 (19.0%)
Died
7 (16.7%)
Outcome Unknown
5 (11.9%)
Recovered with Sequela
1 (2.4%)

Mirtazipine Adverse Event Insights

42 reports name Mirtazipine; 17 recorded a death outcome (40.5% of reported events, not a population-level mortality rate). Active ingredient: Mirtazipine. Administration routes: Oral, Unknown, Topical.

By species: Dog (23 reports), Cat (19 reports). By breed: Domestic Shorthair (12), Crossbred Canine/dog (5), Schnauzer - Miniature (3).

Leading clinical signs: Anorexia (12), Death by euthanasia (10), Vomiting (9), Weight loss (9). Outcome, 42 coded reports: Ongoing leads at 26.2%.

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.