Reaction profile
The FDA adverse-event record for selenium toxicity signs
10 FDA reports name selenium toxicity signs, a lower-volume reaction in the CVM extract (VeDDRA 2020). Plate stamps and neighbourhood peers follow.
- #2474 of 2,481
- by report volume (all reactions)
- 10
- reports citing this reaction
- 90.0%
- death-coded share
- Cattle
- 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. Selenium toxicity signs has 10 reports now versus 10 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 Selenium toxicity signs changesFDA AER · VeDDRA plate
Code 2020 VOL-TRACE
VOL-TRACE · DEATH-HOT · BOTTOM-DECILE · PHOTO-FINISH · SPECIES-CATTLE · DRUG-LEAD · DESK-MID · BOOK-FULL
- VOL-TRACE 10 reports
- DEATH-HOT 90.0%
- BOTTOM-DECILE #2474/2481
- PHOTO-FINISH Anoxia
- SPECIES-CATTLE Cattle · 8
- DRUG-LEAD Clos P*2/Cl Oth*4… · 2
- DESK-MID 6 breeds
- BOOK-FULL 8/8 fields
Nearest volume peer: Anoxia (±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 Selenium toxicity signs
Lower-third volume poles plus nearest peers, not a full reaction corpus board reprint.
Selenium toxicity signs: high death-coded share in the FDA AER plate
Signature read: 10 reports place Selenium toxicity signs in the lower third of FDA AER volume (#2474 of 2,481). Report volume is lower-third scale: 10 named reports in the openFDA extract. Death-coded share is upper-third: 9 of 10 reports (90.0% of named reports). Nearest volume peer: Anoxia (±0 reports). Lead species Cattle (8). Lead co-reported drug Clos P*2/Cl Oth*4/H.Somnus Kb (2).
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
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
Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →