Drug profile

The FDA adverse-event record for Baytril

85 FDA reports name Baytril, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#852 of 2,679
by report volume (all drugs)
85
adverse-event reports
47.1%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Baytril ranks #851 of 2679 by total reports (85) and #67 of 1130 by death-coded share (47.1%). National dual: Milbemycin Oxime + Spinosad is #1 of 2679 drugs by total adverse-event reports (149,624) at death-coded-share rank 965 of 1130 drugs with at least 50 reports (2.3%); separately, Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) is #1 highest death-coded share at 97.8% (report rank #821).

149,624
Milbemycin Oxime + Spinosad reports (#1)
97.8%
Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) death share (#1)
#851
This drug, reports of 2679
#67
This drug, death share of 1130

Report volume reflects how common a breed or drug is and how often owners and vets file — not actual risk. Death-coded share ranks are limited to entries with enough reports to be meaningful. The two maps do not agree at #1.

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. Baytril has 85 reports now versus 85 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 Baytril changes

Signature read: Baytril's 47.1% death-coded share is among the highest in the openFDA drug corpus.

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
85
Total Reports
40
Deaths Reported
47.1%
Death-coded share of reports

Active Ingredients

Baytril

Administration Routes

UnknownOralSubcutaneousIntravenousAuricular (Otic)

Species Affected

Dog 67
Cattle 12
Cat 6

Most Affected Breeds

Mixed (Cattle) 12
Crossbred Canine/dog 9
Terrier - Bull - American Pit 9
Retriever - Labrador 6
Retriever - Golden 6
Pug 5
Domestic Shorthair 4
Dachshund - Miniature 2
Terrier (unspecified) 2
Chow Chow 2

Most Reported Reactions

Death 23
Death by euthanasia 17
Vomiting 16
Lack of efficacy - NOS 16
Not eating 15
Lethargy (see also Central nervous system depression in Neurological) 14
Weight loss 12
Fever 10
Ataxia 10
Anorexia 9
Abnormal radiograph finding 9
Urinary tract infection 9

Outcome Breakdown

Ongoing
32 (33.3%)
Died
22 (22.9%)
Euthanized
18 (18.8%)
Outcome Unknown
18 (18.8%)
Recovered/Normal
6 (6.3%)

Baytril: high death-coded share in the FDA AER row

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

High-volume nationwide drug peers

Two openFDA-derived peer sets for Baytril, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

What to do with this drug

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 Baytril (#852 of 2,679 by report volume); death-coded 47.1%. PlainBreed drug row · death-coded share stamp 47.1% · 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 →