Reaction profile
The FDA adverse-event record for prolonged activated partial thrombin time (aptt)
368 FDA reports name prolonged activated partial thrombin time (aptt), a high-volume reaction in the CVM extract (VeDDRA 2210). Plate stamps and neighbourhood peers follow.
- #780 of 2,481
- by report volume (all reactions)
- 368
- reports citing this reaction
- 37.5%
- death-coded share
- Dog
- most-affected species
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. Prolonged activated partial thrombin time (APTT) has 368 reports now versus 357 in that prior snapshot: 11 more (3.1%).
- Report change
- +11
- Death-coded reports
- +3
- Death-coded share
- −0.3 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 Prolonged activated partial thrombin time (APTT) changesFDA AER · VeDDRA plate
Code 2210 VOL-LOW
VOL-LOW · DEATH-HOT · MID-PACK · PHOTO-FINISH · SPECIES-DOG · DRUG-LEAD · DESK-WIDE · BOOK-FULL
- VOL-LOW 368 reports
- DEATH-HOT 37.5%
- MID-PACK #780/2481
- PHOTO-FINISH Abdominal cavity haem…
- SPECIES-DOG Dog · 335
- DRUG-LEAD Carprofen · 97
- DESK-WIDE 20 breeds
- BOOK-FULL 8/8 fields
Nearest volume peer: Abdominal cavity haemorrhage (±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.
High-volume neighbourhood around Prolonged activated partial thrombin time
Upper-third volume poles plus nearest peers, not a full reaction corpus board reprint.
Prolonged activated partial thrombin time (APTT): high death-coded share in the FDA AER plate
Signature read: 138 death-coded reports is a heavy tail count for Prolonged activated partial thrombin time (APTT) in the CVM extract. Report volume is upper-third scale: 368 named reports in the openFDA extract. Death-coded share is upper-third: 138 of 368 reports (37.5% of named reports). Nearest volume peer: Abdominal cavity haemorrhage (±0 reports). Lead species Dog (335). Lead co-reported drug Carprofen (97).
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
Breeds Most Affected
Associated Drugs
Nationwide reactions with similar profiles
Two openFDA-derived peer sets for Prolonged activated partial thrombin time (APTT), both floored at ≥50 reports so the neighborhoods stay in the advertised mass (the volume chart above is the unfloored photo-finish strip).
Similar report volume
Nearest other reactions by FDA report count (368 here).
Similar death-coded share
Nearest other reactions by death-coded share (37.5% here), distinct from the volume row.
What to do with this reaction
- Compare Prolonged activated partial thrombin time's report profile against similar reactions nationwide. See similar reactions
- 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
Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →