Drug profile

The FDA adverse-event record for Milbemycin Oxime And Praziquantel

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

39
adverse-event reports
5.1%
death-coded share
Dog
most-reported species
11
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.
39
Total Reports
2
Deaths Reported
5.1%
Death Rate

Active Ingredients

Milbemycin Oxime And Praziquantel

Administration Routes

OralUnknown

Species Affected

Dog 39

Most Affected Breeds

Retriever - Labrador 8
Collie - Border 4
Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog) 3
Dachshund (unspecified) 3
Terrier - Jack Russell 2
Retriever - Golden 2
Beagle 2
Boxer (German Boxer) 2
Mixed (Dog) 1
Maltese 1

Most Reported Reactions

Lack of efficacy (endoparasite) - heartworm 11
Vomiting 8
Lethargy (see also Central nervous system depression in 'Neurological') 5
Diarrhoea 5
Inappetence 4
Lethargy (see also Central nervous system depression in Neurological) 4
Medication error NOS 3
Panting 2
Pustules 2
Not eating 2
Itching 2
Elevated renal parameters 2

Outcome Breakdown

Recovered/Normal
14 (35.9%)
Ongoing
14 (35.9%)
Outcome Unknown
9 (23.1%)
Died
2 (5.1%)

Milbemycin Oxime And Praziquantel Adverse Event Insights

39 reports name Milbemycin Oxime And Praziquantel; 2 recorded a death outcome (5.1% of reported events, not a population-level mortality rate). Active ingredient: Milbemycin Oxime And Praziquantel. Administration routes: Oral, Unknown.

By species: Dog (39 reports). By breed: Retriever - Labrador (8), Collie - Border (4), Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog) (3).

Leading clinical signs: Lack of efficacy (endoparasite) - heartworm (11), Vomiting (8), Lethargy (see also Central nervous system depression in 'Neurological') (5), Diarrhoea (5). Outcome, 39 coded reports: Recovered/Normal leads at 35.9%.

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.