Drug profile

The FDA adverse-event record for Unspecified Thyroid Supplement

19 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Unspecified Thyroid Supplement. See the species affected, top reactions, and outcomes below.

19
adverse-event reports
21.1%
death-coded share
Dog
most-reported species
5
Urinary tract infection - 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.
19
Total Reports
4
Deaths Reported
21.1%
Death Rate

Active Ingredients

Unspecified Thyroid Supplement

Administration Routes

OralUnknown

Species Affected

Dog 19

Most Affected Breeds

Retriever - Labrador 5
Dachshund - Miniature 2
Mastiff (unspecified) 2
Akita 1
Rottweiler 1
Spitz - German Pomeranian 1
Spaniel (unspecified) 1
Shiba Inu 1
Poodle - Miniature 1
Dachshund - Standard Smooth-haired 1

Most Reported Reactions

Urinary tract infection 5
Elevated serum alkaline phosphatase (SAP) 5
Vomiting 4
Weight loss 4
Hyperkalaemia 4
Decreased appetite 4
Elevated alanine aminotransferase (ALT) 4
Low sodium-potassium ratio (Na:K ratio) 4
Death by euthanasia 3
Underdose 3
Elevated blood urea nitrogen (BUN) 3
Polyuria 2

Outcome Breakdown

Outcome Unknown
9 (47.4%)
Euthanized
3 (15.8%)
Ongoing
3 (15.8%)
Recovered/Normal
2 (10.5%)
Died
1 (5.3%)
Recovered with Sequela
1 (5.3%)

Unspecified Thyroid Supplement Adverse Event Insights

19 reports name Unspecified Thyroid Supplement; 4 recorded a death outcome (21.1% of reported events, not a population-level mortality rate). Active ingredient: Unspecified Thyroid Supplement. Administration routes: Oral, Unknown.

By species: Dog (19 reports). By breed: Retriever - Labrador (5), Dachshund - Miniature (2), Mastiff (unspecified) (2).

Leading clinical signs: Urinary tract infection (5), Elevated serum alkaline phosphatase (SAP) (5), Vomiting (4), Weight loss (4). Outcome, 19 coded reports: Outcome Unknown leads at 47.4%.

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.