Drug profile

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

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

17
adverse-event reports
11.8%
death-coded share
Dog
most-reported species
6
Lack of efficacy (endoparasite) - heartworm - 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.
17
Total Reports
2
Deaths Reported
11.8%
Death Rate

Active Ingredients

Milbemycin Oxime + Praziquantel + Lufenuron

Administration Routes

UnknownOral

Species Affected

Dog 17

Most Affected Breeds

Terrier - Boston 2
Crossbred Canine/dog 2
Chihuahua 2
Retriever - Golden 1
Terrier (unspecified) 1
Shepherd Dog - Australian 1
Sheepdog - Shetland 1
Retriever - Labrador 1
Terrier - Irish Soft-coated Wheaten 1
Shih Tzu 1

Most Reported Reactions

Lack of efficacy (endoparasite) - heartworm 6
Lack of efficacy - NOS 3
INEFFECTIVE, HEARTWORM LARVAE 3
Other abnormal test result NOS 2
Emesis 2
Lack of efficacy (ectoparasite) - flea 2
Seizure NOS 2
Diarrhoea 2
Death by euthanasia 2
Vomiting 2
Behavioural disorder NOS 2
Osteosarcoma 1

Outcome Breakdown

Outcome Unknown
12 (70.6%)
Recovered/Normal
3 (17.6%)
Euthanized
2 (11.8%)

Milbemycin Oxime + Praziquantel + Lufenuron Adverse Event Insights

17 reports name Milbemycin Oxime + Praziquantel + Lufenuron; 2 recorded a death outcome (11.8% of reported events, not a population-level mortality rate). Active ingredient: Milbemycin Oxime + Praziquantel + Lufenuron. Administration routes: Unknown, Oral.

By species: Dog (17 reports). By breed: Terrier - Boston (2), Crossbred Canine/dog (2), Chihuahua (2).

Leading clinical signs: Lack of efficacy (endoparasite) - heartworm (6), Lack of efficacy - NOS (3), INEFFECTIVE, HEARTWORM LARVAE (3), Other abnormal test result NOS (2). Outcome, 17 coded reports: Outcome Unknown leads at 70.6%.

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.