Reaction profile

The FDA adverse-event record for hydrothorax

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

19 FDA reports name hydrothorax, a lower-volume reaction in the CVM extract (VeDDRA 890). Plate stamps and neighbourhood peers follow.

#2183 of 2,481
by report volume (all reactions): 19
reports citing this reaction: 78.9%
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. Hydrothorax has 19 reports now versus 19 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 Hydrothorax changes

FDA AER · VeDDRA plate

Code 890 VOL-TRACE

VOL-TRACE · DEATH-HOT · LOWER-Q · PHOTO-FINISH · SPECIES-CAT · DRUG-LEAD · DESK-WIDE · BOOK-FULL

VOL-TRACE 19 reports
DEATH-HOT 78.9%
LOWER-Q #2183/2481
PHOTO-FINISH Adaptor, damaged
SPECIES-CAT Cat · 7
DRUG-LEAD Moxidectin · 4
DESK-WIDE 14 breeds
BOOK-FULL 8/8 fields

Nearest volume peer: Adaptor, damaged (±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 Hydrothorax

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

FDA AER report volume · neighbourhood around Hydrothorax

Hydrothorax: high death-coded share in the FDA AER plate

Signature read: Hydrothorax's 78.9% death-coded share is among the highest in the openFDA reaction corpus. Report volume is lower-third scale: 19 named reports in the openFDA extract. Death-coded share is upper-third: 15 of 19 reports (78.9% of named reports). Nearest volume peer: Adaptor, damaged (±0 reports). Lead species Cat (7). Lead co-reported drug Moxidectin (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 7

Dog 7

Cattle 4

Goat 1

Breeds Most Affected

Domestic Shorthair 5

Holstein-Friesian also known as Holstein 2

Domestic Longhair 1

Rottweiler 1

Pointing Dog - Hungarian Short-haired (Vizsla) 1

Terrier - Yorkshire 1

Crossbred Caprine/goat 1

Terrier - Jack Russell 1

Maltese 1

Charolais 1

Associated Drugs

Moxidectin 4

Spinosad 3

Monensin Sodium 2

Mirtazapine 2

Emodepside + Praziquantel 1

Dexmedetomidine Hydrochloride 1

Atipamezole Hydrochloride 1

Ketamine 1

Isoflurane 1

Meloxicam 1

Buprenorphine 1

Firocoxib 227 Mg Chewable 1

Milbemycin Oxime + Spinosad 1

Dhpp Vaccine 1

Lepto Vaccine 1

Ivermectin 1

Clostridium Perfringens Types C & D-Tetanus Toxoid 1

Enrofloxacin 1

Insulin Injectable Vial 1

Multimineral Injection 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 Hydrothorax (#2183 of 2,481 by report volume); death-coded 78.9%. PlainBreed reaction plate · death-coded share stamp 78.9% · 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 →