Drug profile

The FDA adverse-event record for Milbemycin Oxime, Praziquantel

1,214 FDA reports name Milbemycin Oxime, Praziquantel, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#158 of 2,679
by report volume (all drugs)
1,214
adverse-event reports
3.8%
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 #158 of 2679 by total reports (1,214) and #861 of 1130 by death-coded share (3.8%). 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)
#158
This drug, reports of 2679
#861
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 1,214 reports now versus 1,205 in that prior snapshot: 9 more (0.7%).

Report change
+9
Death-coded reports
+0
Death-coded share
−0.0 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: 1,214 reports place Milbemycin Oxime, Praziquantel in the upper third of FDA AER volume (#158 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.
1,214
Total Reports
46
Deaths Reported
3.8%
Death-coded share of reports

Active Ingredients

Milbemycin Oxime, Praziquantel

Administration Routes

OralUnknownTopicalOther

Species Affected

Dog 1,197
Unknown 15
Human 1
Cat 1

Most Affected Breeds

Retriever - Labrador 166
Crossbred Canine/dog 85
Retriever - Golden 68
Shepherd Dog - German 65
Dog (unknown) 54
Shepherd Dog - Australian 46
Beagle 37
Chihuahua 37
Pit Bull 34
Terrier - Yorkshire 26

Most Reported Reactions

Lack of efficacy (endoparasite) - heartworm 319
Vomiting 206
Lethargy (see also Central nervous system depression in Neurological) 91
Diarrhoea 90
Lack of efficacy (endoparasite) - hookworm 88
Lack of efficacy (endoparasite) - tapeworm 63
Other abnormal test result NOS 56
Lack of efficacy (endoparasite) - NOS 50
Seizure NOS 47
Lack of efficacy (endoparasite) - roundworm NOS 47
Not eating 44
Loose stool 39

Outcome Breakdown

Outcome Unknown
633 (52.8%)
Recovered/Normal
261 (21.8%)
Ongoing
256 (21.4%)
Died
24 (2.0%)
Euthanized
22 (1.8%)
Recovered with Sequela
3 (0.3%)

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.

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 (#158 of 2,679 by report volume); death-coded 3.8%. PlainBreed drug row · report volume stamp 1,214 · 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 →