Drug profile

The FDA adverse-event record for Milbemycin Oxime/Lufenuron

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

84
adverse-event reports
3.6%
death-coded share
Dog
most-reported species
19
Vomiting - top reaction
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Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
84
Total Reports
3
Deaths Reported
3.6%
Death Rate

Active Ingredients

Milbemycin Oxime/Lufenuron

Administration Routes

OralUnknown

Species Affected

Dog 84

Most Affected Breeds

Retriever - Labrador 13
Crossbred Canine/dog 6
Greyhound 6
Chihuahua 5
Shepherd Dog - German 5
Pit Bull 5
Dog (unknown) 5
Shih Tzu 4
Retriever - Golden 4
Schnauzer - Miniature 3

Most Reported Reactions

Vomiting 19
Lethargy (see also Central nervous system depression in 'Neurological') 13
Diarrhoea 12
INEFFECTIVE, HOOKS 8
Other abnormal test result NOS 6
INEFFECTIVE, HEARTWORM LARVAE 6
Decreased appetite 5
Lack of efficacy (endoparasite) - tapeworm 5
Emesis (multiple) 5
Anorexia 5
Behavioural disorder NOS 4
Underdose 4

Outcome Breakdown

Outcome Unknown
45 (53.6%)
Recovered/Normal
29 (34.5%)
Ongoing
5 (6.0%)
Euthanized
2 (2.4%)
Recovered with Sequela
2 (2.4%)
Died
1 (1.2%)

Milbemycin Oxime/Lufenuron Adverse Event Insights

84 reports name Milbemycin Oxime/Lufenuron; 3 recorded a death outcome (3.6% of reported events, not a population-level mortality rate). Active ingredient: Milbemycin Oxime/Lufenuron. Administration routes: Oral, Unknown.

By species: Dog (84 reports). By breed: Retriever - Labrador (13), Crossbred Canine/dog (6), Greyhound (6).

Leading clinical signs: Vomiting (19), Lethargy (see also Central nervous system depression in 'Neurological') (13), Diarrhoea (12), INEFFECTIVE, HOOKS (8). Outcome, 84 coded reports: Outcome Unknown leads at 53.6%.

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.