Drug profile

The FDA adverse-event record for Unspecified Dewormer

59 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Unspecified Dewormer. Species, reactions, and outcomes follow.

#1023 of 2,679
by report volume (all drugs)
59
adverse-event reports
18.6%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Unspecified Dewormer ranks #1017 of 2679 by total reports (59) and #267 of 1130 by death-coded share (18.6%). 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)
#1017
This drug, reports of 2679
#267
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. Unspecified Dewormer has 59 reports now versus 59 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 Unspecified Dewormer changes

Signature read: Unspecified Dewormer's 18.6% 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.
59
Total Reports
11
Deaths Reported
18.6%
Death-coded share of reports

Active Ingredients

Unspecified Dewormer

Administration Routes

UnknownOralTopical

Species Affected

Dog 42
Cat 16
Cattle 1

Most Affected Breeds

Domestic Shorthair 14
Dog (unknown) 5
Retriever - Labrador 5
Chihuahua 4
Shepherd Dog - German 3
Pit Bull 2
Crossbred Canine/dog 2
Terrier - Yorkshire 2
Mixed (Dog) 2
Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog) 2

Most Reported Reactions

Lethargy (see also Central nervous system depression in 'Neurological') 11
Vomiting 10
Behavioural disorder NOS 7
Diarrhoea 7
Anorexia 6
Death 6
Lack of efficacy (endoparasite) - roundworm NOS 5
Lethargy (see also Central nervous system depression in Neurological) 5
Emesis (multiple) 4
Overdose 4
Inappropriate defecation 4
Seizure NOS 4

Outcome Breakdown

Outcome Unknown
24 (40.7%)
Recovered/Normal
15 (25.4%)
Ongoing
9 (15.3%)
Died
7 (11.9%)
Euthanized
4 (6.8%)

Unspecified Dewormer: 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.

Nationwide drugs with similar profiles

Two openFDA-derived peer sets for Unspecified Dewormer, 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 Unspecified Dewormer (#1023 of 2,679 by report volume); death-coded 18.6%. PlainBreed drug row · death-coded share stamp 18.6% · 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 →