Drug profile

The FDA adverse-event record for Coenzyme Q10

18 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Coenzyme Q10. See the species affected, top reactions, and outcomes below.

18
adverse-event reports
11.1%
death-coded share
Dog
most-reported species
3
Emesis - 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.
18
Total Reports
2
Deaths Reported
11.1%
Death Rate

Active Ingredients

Coenzyme Q10

Administration Routes

OralUnknown

Species Affected

Dog 12
Cat 4
Human 2

Most Affected Breeds

Schnauzer - Miniature 2
Unknown 2
Domestic Shorthair 2
Terrier - American Staffordshire 2
Doberman Pinscher 1
Domestic Mediumhair 1
Terrier - Yorkshire 1
Shih Tzu 1
Terrier (unspecified) 1
Shepherd Dog - German 1

Most Reported Reactions

Emesis 3
Nausea 3
Decreased appetite 3
Lack of efficacy (ectoparasite) - flea 3
Elevated liver enzymes 2
Death by euthanasia 2
Discomfort NOS 2
Itching 2
Ataxia 2
Vomiting 2
Behavioural disorder NOS 2
Drug dose administration interval too long 2

Outcome Breakdown

Outcome Unknown
8 (44.4%)
Ongoing
4 (22.2%)
Recovered/Normal
4 (22.2%)
Euthanized
2 (11.1%)

Coenzyme Q10 Adverse Event Insights

18 reports name Coenzyme Q10; 2 recorded a death outcome (11.1% of reported events, not a population-level mortality rate). Active ingredient: Coenzyme Q10. Administration routes: Oral, Unknown.

By species: Dog (12 reports), Cat (4 reports), Human (2 reports). By breed: Schnauzer - Miniature (2), Unknown (2), Domestic Shorthair (2).

Leading clinical signs: Emesis (3), Nausea (3), Decreased appetite (3), Lack of efficacy (ectoparasite) - flea (3). Outcome, 18 coded reports: Outcome Unknown leads at 44.4%.

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.