Drug profile

The FDA adverse-event record for Canine Influenza Virus H3N8;Canine Influenza Virus H3N2

398 FDA reports name Canine Influenza Virus H3N8;Canine Influenza Virus H3N2, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#352 of 2,679
by report volume (all drugs)
398
adverse-event reports
8.5%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Canine Influenza Virus H3N8;Canine Influenza Virus H3N2 ranks #351 of 2679 by total reports (398) and #617 of 1130 by death-coded share (8.5%). 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)
#351
This drug, reports of 2679
#617
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. Canine Influenza Virus H3N8;Canine Influenza Virus H3N2 has 398 reports now versus 398 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 Canine Influenza Virus H3N8;Canine Influenza Virus H3N2 changes

Signature read: 398 reports place Canine Influenza Virus H3N8;Canine Influenza Virus H3N2 in the upper third of FDA AER volume (#352 of 2,679).

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
398
Total Reports
34
Deaths Reported
8.5%
Death-coded share of reports

Active Ingredients

Canine Influenza Virus H3N8;Canine Influenza Virus H3N2

Administration Routes

SubcutaneousUnknownOralNasalOphthalmic

Species Affected

Dog 398

Most Affected Breeds

Retriever - Labrador 43
Terrier - Bull - American Pit 26
Shih Tzu 15
Boxer (German Boxer) 14
Bulldog - French 13
Maltese 13
Terrier (unspecified) 13
Shepherd Dog - German 12
Retriever - Golden 12
Chihuahua 11

Most Reported Reactions

Vomiting 185
Lethargy (see also Central nervous system depression in 'Neurological') 101
Facial swelling (see also 'Skin') 78
Hives (see also 'Skin') 60
Diarrhoea 52
Anaphylaxis 50
Fever 30
Pale mucous membrane 28
Anorexia 25
Allergic reaction 24
Bloody diarrhoea 22
Not eating 20

Outcome Breakdown

Ongoing
206 (51.8%)
Recovered/Normal
140 (35.2%)
Euthanized
18 (4.5%)
Outcome Unknown
18 (4.5%)
Died
16 (4.0%)

Canine Influenza Virus H3N8;Canine Influenza Virus H3N2: high report volume 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 Canine Influenza Virus H3N8;Canine Influenza Virus H3N2, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

What to do with this drug

  • Compare Canine Influenza Virus H3N8;Canine Influenza Virus H3N2's report volume and death-coded share against similar drugs nationwide. See similar drugs
  • Read how death-coded share differs from a mortality rate before drawing conclusions. Understanding adverse events
  • Browse the full drug directory to compare report counts across products. All drugs

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 Canine Influenza Virus H3N8;Canine Influenza Virus H3N2 (#352 of 2,679 by report volume); death-coded 8.5%. PlainBreed drug row · report volume stamp 398 · 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 →