Drug profile

The FDA adverse-event record for Milbemycin Oxime/Praziquantel

135 FDA reports name Milbemycin Oxime/Praziquantel, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#665 of 2,679
by report volume (all drugs)
135
adverse-event reports
4.4%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Milbemycin Oxime/Praziquantel ranks #661 of 2679 by total reports (135) and #819 of 1130 by death-coded share (4.4%). National dual: Milbemycin Oxime + Spinosad is #1 of 2679 drugs by total adverse-event reports (149,624) at death-coded-share rank 965 of 1130 drugs with at least 50 reports (2.3%); separately, Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) is #1 highest death-coded share at 97.8% (report rank #821).

149,624
Milbemycin Oxime + Spinosad reports (#1)
97.8%
Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) death share (#1)
#661
This drug, reports of 2679
#819
This drug, death share of 1130

Report volume reflects how common a breed or drug is and how often owners and vets file — not actual risk. Death-coded share ranks are limited to entries with enough reports to be meaningful. The two maps do not agree at #1.

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Milbemycin Oxime/Praziquantel has 135 reports now versus 129 in that prior snapshot: 6 more (4.7%).

Report change
+6
Death-coded reports
+0
Death-coded share
−0.2 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Milbemycin Oxime/Praziquantel changes

Signature read: 135 reports place Milbemycin Oxime/Praziquantel in the upper third of FDA AER volume (#665 of 2,679).

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
135
Total Reports
6
Deaths Reported
4.4%
Death-coded share of reports

Active Ingredients

Milbemycin Oxime/Praziquantel

Administration Routes

OralUnknown

Species Affected

Dog 135

Most Affected Breeds

Retriever - Labrador 18
Crossbred Canine/dog 17
Shepherd Dog - German 6
Terrier - Yorkshire 5
Retriever - Golden 5
Chihuahua 5
Doberman Pinscher 4
Shepherd Dog - Australian 4
Terrier - Bull - Staffordshire 3
Maltese 3

Most Reported Reactions

Vomiting 25
Lack of efficacy (endoparasite) - heartworm 21
Diarrhoea 15
Lethargy (see also Central nervous system depression in 'Neurological') 13
Lack of efficacy (endoparasite) - tapeworm 10
Seizure NOS 8
Weight loss 7
Other abnormal test result NOS 6
Lack of efficacy (heartworm) 6
INEFFECTIVE, HEARTWORM LARVAE 5
Weakness 5
Reluctant to move 5

Outcome Breakdown

Outcome Unknown
51 (37.8%)
Recovered/Normal
47 (34.8%)
Ongoing
30 (22.2%)
Died
3 (2.2%)
Euthanized
3 (2.2%)
Recovered with Sequela
1 (0.7%)

Milbemycin Oxime/Praziquantel: low death-coded share in the FDA AER row

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.

High-volume nationwide drug peers

Two openFDA-derived peer sets for Milbemycin Oxime/Praziquantel, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

Similar death-coded share

Nearest other drugs by death-coded share (4.4% here), distinct from the volume row.

What to do with this drug

  • Compare Milbemycin Oxime/Praziquantel's report volume and death-coded share against similar drugs nationwide. See similar drugs
  • Read how death-coded share differs from a mortality rate before drawing conclusions. Understanding adverse events
  • Browse the full drug directory to compare report counts across products. All drugs

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Milbemycin Oxime/Praziquantel (#665 of 2,679 by report volume); death-coded 4.4%. PlainBreed drug row · report volume stamp 135 · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →