Total Reports
24
FDA CVM filings
Cat /
FDA CVM · 2025 release 24 reports on file
Rex (unspecified) - FDA Adverse Event Profile
Adverse-event records for Rex (unspecified) (Cat) from the FDA Center for Veterinary Medicine.
Data updated June 2026
The record at a glance
Among cat breeds, Rex (unspecified) is #341 by FDA report volume; 12.5% of its 24 reports (3) were death-coded.
- #341
- most-reported cat breed
- 12.5%
- death-coded report share
- 4
- Death by euthanasia - top reaction
- 9.1 yr
- average age at report
Read report counts next to breed popularity: a bigger number often just means more owners and more vet visits.
Deaths Reported
3
of 24 reports
Death Rate
12.5%
death-coded share
Avg Age at Report
9.1 yr
4.2 kg avg weight
Death-Coded Outcome Share
Rex (unspecified) death-coded reports 12.5%
Cross-breed median
12.5% of 24 rex (unspecified) reports involved a death outcome.
How to read this number
Read alongside breed popularity, veterinary access, and owner awareness, these shape how many events ever reach the FDA. The comparison line marks the cross-breed median death-coded share (about 4.8%) among breeds with 50 or more reports; values above it suggest higher reporting bias toward severe outcomes, not necessarily higher true mortality.
Average weight at time of report: 4.2 kg (9.3 lbs)
Top Reported Reactions
Death by euthanasia 4
Depression 4
Anorexia 4
Diarrhoea 4
Vomiting 4
Most Referenced Drugs
Selamectin 4
Unknown Medication 3
Isoflurane 2
Cefovecin Sodium 2
Cyclosporine 2
Outcome Breakdown
Died
3 (30.0%)
Outcome Unknown
3 (30.0%)
Recovered/Normal
2 (20.0%)
Ongoing
2 (20.0%)
Gender Distribution
Female 12 (50.0%)
Male 11 (45.8%)
Mixed 1 (4.2%)
Reports by Year
| Year | Reports | Trend |
|---|---|---|
| 2010 | 11 | |
| 2011 | 3 | |
| 2012 | 2 | |
| 2014 | 1 | |
| 2017 | 1 | |
| 2021 | 1 | |
| 2022 | 1 | |
| 2023 | 1 | |
| 2024 | 3 | |
Rex (unspecified) Pet Health Insights
Rex (unspecified) accounts for 24 FDA adverse event reports, ranking #341 by volume among cat breeds, with 3 reports (12.5%) coded as a death outcome. Mean age at report: 9.1 years, average weight 4.2 kg (9.3 lbs).
Top reported signs: Death by euthanasia (4), Depression (4), Anorexia (4). Most-referenced drug: Selamectin (4 reports), followed by Unknown Medication (3) and Isoflurane (2).
Outcome coding on 10 status-recorded reports is dominated by Died (30.0%). Annual submissions ranged 2,010-2,024 across 9 years on file.
Cat Breeds With a Similar Report Volume
Frequently Asked Questions
How many FDA adverse event reports involve Rex (unspecified)? ▼
There are 24 adverse event reports involving Rex (unspecified) in the FDA database, with 3 reports involving death (12.5% death rate). Rex (unspecified) ranks #341 by report volume.
What are the most common adverse reactions reported for Rex (unspecified)? ▼
The most commonly reported adverse reactions for Rex (unspecified) are Death by euthanasia (4 reports), Depression (4 reports), Anorexia (4 reports), Diarrhoea (4 reports), Vomiting (4 reports).
What drugs are most frequently associated with Rex (unspecified) adverse events? ▼
The drugs most frequently referenced in Rex (unspecified) adverse event reports are Selamectin (4 reports), Unknown Medication (3 reports), Isoflurane (2 reports), Cefovecin Sodium (2 reports), Cyclosporine (2 reports).
What is the average age of Rex (unspecified) in adverse event reports? ▼
The average age of Rex (unspecified) at the time of adverse event reports is 9.1 years, with an average weight of 4.2 kg (9.3 lbs).
Does a high number of adverse event reports mean Rex (unspecified) is unhealthy? ▼
No. FDA adverse event reports are voluntarily submitted and do not prove causation. Popular breeds with more veterinary visits tend to have more reports. The data reflects reporting patterns, not actual incidence rates. Always consult a veterinarian for health decisions.
Where does this Rex (unspecified) safety data come from? ▼
All data comes from the FDA Center for Veterinary Medicine's adverse event reporting system. Pet owners, veterinarians, and manufacturers voluntarily submit reports about adverse events potentially linked to animal drugs and other products.
Compare a breed's report volume against how common the breed is before drawing conclusions. See our methodology for how death rate and rankings are computed.
Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. Breed figures are computed directly from 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.