Drug profile

The FDA adverse-event record for Milbemycin Oxime/Lufenuron/Praziquantel

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

63
adverse-event reports
1.6%
death-coded share
Dog
most-reported species
23
Lack of efficacy (endoparasite) - heartworm - 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.
63
Total Reports
1
Deaths Reported
1.6%
Death Rate

Active Ingredients

Milbemycin Oxime/Lufenuron/Praziquantel

Administration Routes

OralUnknown

Species Affected

Dog 63

Most Affected Breeds

Retriever - Labrador 9
Shepherd Dog - German 6
Crossbred Canine/dog 5
Beagle 3
Siberian Husky 3
Terrier - Yorkshire 3
Doberman Pinscher 2
Bulldog 2
Spaniel - King Charles Cavalier 2
Mountain Dog - Bernese 2

Most Reported Reactions

Lack of efficacy (endoparasite) - heartworm 23
Vomiting 8
Tremor 7
Seizure NOS 7
Diarrhoea 5
Overdose 3
Weight loss 3
Lethargy (see also Central nervous system depression in 'Neurological') 3
Behavioural disorder NOS 3
Lack of efficacy (endoparasite) - tapeworm 2
Walking difficulty 2
Elevated total bilirubin 2

Outcome Breakdown

Ongoing
39 (61.9%)
Recovered/Normal
12 (19.0%)
Outcome Unknown
11 (17.5%)
Died
1 (1.6%)

Milbemycin Oxime/Lufenuron/Praziquantel Adverse Event Insights

63 reports name Milbemycin Oxime/Lufenuron/Praziquantel; 1 recorded a death outcome (1.6% of reported events, not a population-level mortality rate). Active ingredient: Milbemycin Oxime/Lufenuron/Praziquantel. Administration routes: Oral, Unknown.

By species: Dog (63 reports). By breed: Retriever - Labrador (9), Shepherd Dog - German (6), Crossbred Canine/dog (5).

Leading clinical signs: Lack of efficacy (endoparasite) - heartworm (23), Vomiting (8), Tremor (7), Seizure NOS (7). Outcome, 63 coded reports: Ongoing leads at 61.9%.

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.