Drug profile

The FDA adverse-event record for Imidacloprid + Pyriproxyfen

712 FDA reports name Imidacloprid + Pyriproxyfen, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#232 of 2,679
by report volume (all drugs)
712
adverse-event reports
5.6%
death-coded share
Cat
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Imidacloprid + Pyriproxyfen ranks #232 of 2679 by total reports (712) and #755 of 1130 by death-coded share (5.6%). 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)
#232
This drug, reports of 2679
#755
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. Imidacloprid + Pyriproxyfen has 712 reports now versus 708 in that prior snapshot: 4 more (0.6%).

Report change
+4
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 Imidacloprid + Pyriproxyfen changes

Signature read: 712 reports place Imidacloprid + Pyriproxyfen in the upper third of FDA AER volume (#232 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.
712
Total Reports
40
Deaths Reported
5.6%
Death-coded share of reports

Active Ingredients

ImidaclopridImidacloprid + PyriproxyfenPyriproxyfen

Administration Routes

TopicalUnknownOralOtherIntraocular

Species Affected

Cat 499
Dog 206
Human 5
Rabbit 1
Unknown 1

Most Affected Breeds

Domestic Shorthair 253
Cat (unknown) 91
Domestic Longhair 56
Domestic Mediumhair 39
Pit Bull 21
Dog (unknown) 19
Terrier - Yorkshire 17
Maine Coon 17
Chihuahua 14
Siamese 13

Most Reported Reactions

Lack of efficacy (ectoparasite) - flea 230
Pruritus 217
Behavioural disorder NOS 82
Lethargy (see also Central nervous system depression in 'Neurological') 82
Vomiting 71
Lack of efficacy (endoparasite) - tapeworm 40
Weight loss 37
Skin lesion NOS 35
Application site alopecia 33
Diarrhoea 29
Application site pruritus 29
Anorexia 28

Outcome Breakdown

Outcome Unknown
430 (60.5%)
Recovered/Normal
154 (21.7%)
Ongoing
86 (12.1%)
Died
27 (3.8%)
Euthanized
13 (1.8%)
Recovered with Sequela
1 (0.1%)

Imidacloprid + Pyriproxyfen: low 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 Imidacloprid + Pyriproxyfen, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

What to do with this drug

  • Compare Imidacloprid + Pyriproxyfen'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 Imidacloprid + Pyriproxyfen (#232 of 2,679 by report volume); death-coded 5.6%. PlainBreed drug row · report volume stamp 712 · 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 →