Drug profile

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

2,444 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Lufenuron + Milbemycin Oxime + Praziquantel. See the species affected, top reactions, and outcomes below.

2,444
adverse-event reports
1.1%
death-coded share
Dog
most-reported species
528
INEFFECTIVE, HOOKS - 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.
2,444
Total Reports
26
Deaths Reported
1.1%
Death Rate

Active Ingredients

LufenuronMilbemycin OximePraziquantel

Administration Routes

OralUnknownOphthalmicRespiratory (Inhalation)

Species Affected

Dog 2,296
Unknown 146
Human 2

Most Affected Breeds

Retriever - Labrador 425
Unknown 148
Dog (unknown) 138
Retriever - Golden 126
Shepherd Dog - German 115
Crossbred Canine/dog 102
Pit Bull 83
Chihuahua 64
Beagle 63
Boxer (German Boxer) 57

Most Reported Reactions

INEFFECTIVE, HOOKS 528
Lack of efficacy (endoparasite) - heartworm 422
Vomiting 382
Lack of efficacy (heartworm) 199
Diarrhoea 176
Lethargy (see also Central nervous system depression in 'Neurological') 141
INEFFECTIVE, HEARTWORM LARVAE 137
Lack of efficacy (roundworm) 127
Product problem 123
Containers, Damaged 86
Lack of efficacy (endoparasite) - roundworm NOS 79
Underdose 72

Outcome Breakdown

Outcome Unknown
1,659 (72.2%)
Recovered/Normal
578 (25.1%)
Ongoing
33 (1.4%)
Euthanized
13 (0.6%)
Died
13 (0.6%)
Recovered with Sequela
3 (0.1%)

Lufenuron + Milbemycin Oxime + Praziquantel Adverse Event Insights

2,444 reports name Lufenuron + Milbemycin Oxime + Praziquantel; 26 recorded a death outcome (1.1% of reported events, not a population-level mortality rate). Active ingredients: Lufenuron, Milbemycin Oxime, Praziquantel. Administration routes: Oral, Unknown, Ophthalmic, Respiratory (Inhalation).

By species: Dog (2,296 reports), Unknown (146 reports), Human (2 reports). By breed: Retriever - Labrador (425), Unknown (148), Dog (unknown) (138).

Leading clinical signs: INEFFECTIVE, HOOKS (528), Lack of efficacy (endoparasite) - heartworm (422), Vomiting (382), Lack of efficacy (heartworm) (199). Outcome, 2,299 coded reports: Outcome Unknown leads at 72.2%.

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.