Reaction profile

The FDA adverse-event record for enlarged thyroid gland

Name: Enlarged thyroid gland - FDA Animal Adverse Reaction
Creator: PlainBreed
License: https://open.fda.gov/license/

15 FDA reports name enlarged thyroid gland, a lower-volume reaction in the CVM extract (VeDDRA 2679). Plate stamps and neighbourhood peers follow.

#2297 of 2,481
by report volume (all reactions): 15
reports citing this reaction: 33.3%
death-coded share: Cat
most-affected species

Compiled by PlainBreed

Verify with FDA CVM →

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Enlarged thyroid gland has 15 reports now versus 15 in that prior snapshot: 0 the same number of (0.0%).

Report change: +0
Death-coded reports: +0
Death-coded share: +0.0 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Enlarged thyroid gland changes

FDA AER · VeDDRA plate

Code 2679 VOL-TRACE

VOL-TRACE · DEATH-HOT · BOTTOM-DECILE · PHOTO-FINISH · SPECIES-CAT · DRUG-LEAD · DESK-MID · BOOK-FULL

VOL-TRACE 15 reports
DEATH-HOT 33.3%
BOTTOM-DECILE #2297/2481
PHOTO-FINISH Abomasal ulcer
SPECIES-CAT Cat · 10
DRUG-LEAD Ilunocitinib · 4
DESK-MID 7 breeds
BOOK-FULL 8/8 fields

Nearest volume peer: Abomasal ulcer (±0 reports)

Upper-third death-coded share drives the outcome stamps on this plate; volume band, corpus rank, and co-report peers follow. Not a clinical diagnosis.

Lower-volume neighbourhood around Enlarged thyroid gland

Lower-third volume poles plus nearest peers, not a full reaction corpus board reprint.

FDA AER report volume · neighbourhood around Enlarged thyroid gland

Enlarged thyroid gland: high death-coded share in the FDA AER plate

Signature read: 15 reports place Enlarged thyroid gland in the lower third of FDA AER volume (#2297 of 2,481). Report volume is lower-third scale: 15 named reports in the openFDA extract. Death-coded share is upper-third: 5 of 15 reports (33.3% of named reports). Nearest volume peer: Abomasal ulcer (±0 reports). Lead species Cat (10). Lead co-reported drug Ilunocitinib (4).

Read these counts as reporting volume, not risk: per our methodology, A high death-coded share in FDA filings does not prove causation; co-reporting is voluntary temporal association only. Browse the full reactions index or the about page for how PlainBreed frames FDA CVM extracts.

Species Most Affected

Cat 10

Dog 4

Horse 1

Breeds Most Affected

Domestic Shorthair 9

Welsh Mountain Pony 1

Dog (other) 1

Basenji 1

Dog (unknown) 1

Domestic Longhair 1

Beagle 1

Associated Drugs

Ilunocitinib 4

Bexagliflozin 2

Telmisartan 1

Mirtazapine 1

Ivermectin 1

Cefovecin 1

Lidocaine Hcl 1

Insulin Injectable Vial 1

Pergolide Mesylate 1

Grapiprant 1

Orbifloxacin Oral Suspension 1

Fluralaner Spot-On Solution 1

Pyrantel Pamoate;Sarolaner 1

Polysulfated Glycosaminoglycan 1

Tramadol 1

Boswellia, Turmeric, Glucosamine, Chondroitin, Msm And Omega-3 Fatty Acids 1

Carprofen 1

Gabapentin 1

Methocarbamol 1

Cold Laser Therapy 1

What to do with this reaction

Read how death-coded share differs from a mortality rate before drawing conclusions. Understanding adverse events
Browse the full reaction directory to compare report counts across reaction types. All reactions

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Enlarged thyroid gland (#2297 of 2,481 by report volume); death-coded 33.3%. PlainBreed reaction plate · report volume stamp 15 · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →