Drug profile

The FDA adverse-event record for Spinosad; Milbemycin Oxime

824 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Spinosad; Milbemycin Oxime. See the species affected, top reactions, and outcomes below.

824
adverse-event reports
2.5%
death-coded share
Dog
most-reported species
259
Emesis - top reaction
Verify with FDA CVM →
Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
824
Total Reports
21
Deaths Reported
2.5%
Death Rate

Active Ingredients

Spinosad; Milbemycin Oxime

Administration Routes

OralUnknownTopicalOtherCutaneous

Species Affected

Dog 733
Unknown 84
Human 4
Other 1
Cat 1
Other Canids 1

Most Affected Breeds

Unknown 89
Dog (unknown) 69
Retriever - Labrador 64
Crossbred Canine/dog 42
Retriever - Golden 35
Chihuahua 35
Shepherd Dog - German 28
Shih Tzu 28
Boxer (German Boxer) 24
Pit Bull 23

Most Reported Reactions

Emesis 259
Vomiting 131
Lethargy (see also Central nervous system depression in 'Neurological') 129
UNPALATABLE 83
Lack of efficacy (ectoparasite) - flea 48
Diarrhoea 43
Lack of efficacy - NOS 42
Behavioural disorder NOS 37
Lack of efficacy (endoparasite) - heartworm 32
Shaking 30
Seizure NOS 29
Emesis (multiple) 27

Outcome Breakdown

Recovered/Normal
413 (55.8%)
Outcome Unknown
214 (28.9%)
Ongoing
61 (8.2%)
Recovered with Sequela
31 (4.2%)
Died
13 (1.8%)
Euthanized
8 (1.1%)

Spinosad; Milbemycin Oxime Adverse Event Insights

824 reports name Spinosad; Milbemycin Oxime; 21 recorded a death outcome (2.5% of reported events, not a population-level mortality rate). Active ingredient: Spinosad; Milbemycin Oxime. Administration routes: Oral, Unknown, Topical, Other.

By species: Dog (733 reports), Unknown (84 reports), Human (4 reports). By breed: Unknown (89), Dog (unknown) (69), Retriever - Labrador (64).

Leading clinical signs: Emesis (259), Vomiting (131), Lethargy (see also Central nervous system depression in 'Neurological') (129), UNPALATABLE (83). Outcome, 740 coded reports: Recovered/Normal leads at 55.8%.

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.

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.