Drug profile

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

74 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.

74
adverse-event reports
1.4%
death-coded share
Dog
most-reported species
16
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.
74
Total Reports
1
Deaths Reported
1.4%
Death Rate

Active Ingredients

Milbemycin Oxime, Lufenuron, Praziquantel

Administration Routes

OralUnknown

Species Affected

Dog 73
Unknown 1

Most Affected Breeds

Dog (unknown) 30
Retriever - Labrador 8
Shepherd Dog - German 5
Beagle 4
Crossbred Canine/dog 3
Corgi - Welsh Cardigan 2
Collie - Border 2
Boxer (German Boxer) 1
Pit Bull 1
Poodle - Toy 1

Most Reported Reactions

Vomiting 16
INEFFECTIVE, HOOKS 12
Lack of efficacy (endoparasite) - heartworm 9
Diarrhoea 8
Lethargy (see also Central nervous system depression in 'Neurological') 8
Lack of efficacy (flea) 6
Lack of efficacy (heartworm) 6
Seizure NOS 2
Urinary incontinence 2
Elevated alanine aminotransferase (ALT) 2
Loose stool 2
Lack of efficacy (endoparasite) - roundworm NOS 2

Outcome Breakdown

Outcome Unknown
54 (77.1%)
Recovered/Normal
12 (17.1%)
Ongoing
3 (4.3%)
Died
1 (1.4%)

Milbemycin Oxime, Lufenuron, Praziquantel Adverse Event Insights

74 reports name Milbemycin Oxime, Lufenuron, Praziquantel; 1 recorded a death outcome (1.4% of reported events, not a population-level mortality rate). Active ingredient: Milbemycin Oxime, Lufenuron, Praziquantel. Administration routes: Oral, Unknown.

By species: Dog (73 reports), Unknown (1 reports). By breed: Dog (unknown) (30), Retriever - Labrador (8), Shepherd Dog - German (5).

Leading clinical signs: Vomiting (16), INEFFECTIVE, HOOKS (12), Lack of efficacy (endoparasite) - heartworm (9), Diarrhoea (8). Outcome, 70 coded reports: Outcome Unknown leads at 77.1%.

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.