Drug profile

The FDA adverse-event record for Minocycline Hcl

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

50
adverse-event reports
28.0%
death-coded share
Dog
most-reported species
14
Lethargy (see also Central nervous system depression in 'Neurological') - 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.
50
Total Reports
14
Deaths Reported
28.0%
Death Rate

Active Ingredients

Minocycline Hcl

Administration Routes

UnknownOral

Species Affected

Dog 49
Cat 1

Most Affected Breeds

Retriever - Labrador 13
Collie (unspecified) 3
Collie - Border 2
Beagle 2
Shih Tzu 2
Mixed (Dog) 2
Shepherd Dog - Australian 2
Dachshund - Miniature 2
Terrier - Bull - Staffordshire 2
Chihuahua 2

Most Reported Reactions

Lethargy (see also Central nervous system depression in 'Neurological') 14
Anaemia NOS 10
Anorexia 9
Other abnormal test result NOS 9
Fever 9
Vomiting 9
Lack of efficacy (endoparasite) - heartworm 9
Elevated total bilirubin 8
Elevated serum alkaline phosphatase (SAP) 8
Leucocytosis NOS 7
Death by euthanasia 7
Elevated alanine aminotransferase (ALT) 7

Outcome Breakdown

Ongoing
32 (64.0%)
Euthanized
7 (14.0%)
Died
7 (14.0%)
Outcome Unknown
2 (4.0%)
Recovered/Normal
2 (4.0%)

Minocycline Hcl Adverse Event Insights

50 reports name Minocycline Hcl; 14 recorded a death outcome (28.0% of reported events, not a population-level mortality rate). Active ingredient: Minocycline Hcl. Administration routes: Unknown, Oral.

By species: Dog (49 reports), Cat (1 reports). By breed: Retriever - Labrador (13), Collie (unspecified) (3), Collie - Border (2).

Leading clinical signs: Lethargy (see also Central nervous system depression in 'Neurological') (14), Anaemia NOS (10), Anorexia (9), Other abnormal test result NOS (9). Outcome, 50 coded reports: Ongoing leads at 64.0%.

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.