Reaction profile

The FDA adverse-event record for impaired consciousness

539 FDA adverse-event reports reference impaired consciousness (VeDDRA 1217). See the species, breeds, and drugs most associated with it below.

539
reports citing this reaction
19.7%
death-coded share
Dog
most-affected species
Milbemycin Oxime + Spinosad
most-associated drug
Verify with FDA CVM →
539
Total Reports
106
Deaths
19.7%
Death Rate

Species Most Affected

Dog 458
Cat 70
Horse 6
Rabbit 2
Cattle 1
Goat 1
Human 1

Breeds Most Affected

Domestic Shorthair 38
Crossbred Canine/dog 28
Chihuahua 27
Terrier - Yorkshire 25
Retriever - Golden 24
Retriever - Labrador 24
Boxer (German Boxer) 23
Shepherd Dog - German 17
Shih Tzu 17
Terrier (unspecified) 13

Associated Drugs

Milbemycin Oxime + Spinosad 221
Spinosad 64
Afoxolaner 30
Ivermectin 28
Isoflurane 22
Buprenorphine 21
Maropitant Citrate 18
Fentanyl 16
Fluralaner 13.64% 12-Week Chew 14
Carprofen 13
Meloxicam 13
Cefovecin 12
Milbemycin Oxime + Praziquantel 11
Pyrantel Pamoate;Sarolaner 11
Gabapentin 10
Fluralaner Chew Tablets 10
Moxidectin 9
Ivermectin + Pyrantel As Pamoate Salt 9
Butorphanol 9
Sarolaner 9

Impaired consciousness Reaction Insights

539 reports name Impaired consciousness; 106 recorded a death outcome (19.7% of reported events, not a population-level mortality rate). VeDDRA code: 1217.

By species: Dog (458 reports), Cat (70 reports), Horse (6 reports). By breed: Domestic Shorthair (38), Crossbred Canine/dog (28), Chihuahua (27).

Most co-reported drugs: Milbemycin Oxime + Spinosad (221 reports), Spinosad (64 reports), Afoxolaner (30 reports), Ivermectin (28 reports).

Read these counts as reporting volume, not risk: per our methodology, co-reporting reflects temporal association captured in voluntary submissions, not proof that a drug caused this reaction. A widely-prescribed drug will rack up more raw co-reports at an identical true rate than a rarely-used one, so compare within similar-exposure products.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. This page draws directly on FDA openFDA data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.