Drug profile

The FDA adverse-event record for Nitenpyram

19,304 FDA reports name Nitenpyram, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#13 of 2,679
by report volume (all drugs)
19,304
adverse-event reports
3.2%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Nitenpyram ranks #13 of 2679 by total reports (19,304) and #898 of 1130 by death-coded share (3.2%). 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)
#13
This drug, reports of 2679
#898
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. Nitenpyram has 19,304 reports now versus 19,220 in that prior snapshot: 84 more (0.4%).

Report change
+84
Death-coded reports
+3
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 Nitenpyram changes

Signature read: 19,304 reports place Nitenpyram in the upper third of FDA AER volume (#13 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.
19,304
Total Reports
622
Deaths Reported
3.2%
Death-coded share of reports

Active Ingredients

Nitenpyram

Administration Routes

OralUnknownTopicalRectalOtherCutaneousTransplacentalTransdermalIntraocularSublingual

Species Affected

Dog 9,751
Cat 7,646
Unknown 1,712
Human 122
Other 68
Other Canids 2
Ferret 1
Rabbit 1
Other Mammals 1

Most Affected Breeds

Domestic Shorthair 3,468
Unknown 1,916
Cat (unknown) 1,180
Dog (unknown) 1,117
Chihuahua 1,089
Domestic Longhair 1,041
Crossbred Canine/dog 817
Retriever - Labrador 499
Domestic Mediumhair 483
Terrier - Yorkshire 481

Most Reported Reactions

Lack of efficacy (ectoparasite) - flea 6,562
Panting 2,101
Hyperactivity 2,008
Lack of efficacy (flea) 1,803
Vocalisation 1,293
Lethargy (see also Central nervous system depression in 'Neurological') 1,290
Scratching 1,173
Vomiting 1,162
Agitation 1,116
Lack of efficacy - NOS 862
Itching 773
Product label issues 739

Outcome Breakdown

Outcome Unknown
9,727 (57.3%)
Recovered/Normal
3,456 (20.3%)
Ongoing
3,137 (18.5%)
Died
474 (2.8%)
Euthanized
148 (0.9%)
Recovered with Sequela
46 (0.3%)

Nitenpyram: 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 Nitenpyram, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

Similar report volume

Nearest other drugs by FDA report count (19,304 here).

Similar death-coded share

Nearest other drugs by death-coded share (3.2% here), distinct from the volume row.

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 Nitenpyram (#13 of 2,679 by report volume); death-coded 3.2%. PlainBreed drug row · report volume stamp 19,304 · 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 →