Reaction profile

The FDA adverse-event record for mammary gland neoplasm nos

124 FDA adverse-event reports reference mammary gland neoplasm nos (VeDDRA 529). See the species, breeds, and drugs most associated with it below.

124
reports citing this reaction
32.3%
death-coded share
Dog
most-affected species
Oclacitinib Maleate
most-associated drug
Verify with FDA CVM →
124
Total Reports
40
Deaths
32.3%
Death Rate

Species Most Affected

Dog 110
Cat 12
Ferret 1
Human 1

Breeds Most Affected

Retriever - Labrador 12
Crossbred Canine/dog 9
Beagle 6
Terrier - Yorkshire 5
Doberman Pinscher 5
Domestic Shorthair 5
Retriever - Golden 5
Shepherd Dog - Australian 5
Shepherd Dog - German 5
Siberian Husky 4

Associated Drugs

Oclacitinib Maleate 27
Milbemycin Oxime + Spinosad 19
Spinosad 8
Ivermectin + Pyrantel As Pamoate Salt 7
Cyclosporine A 6
Afoxolaner 6
Bedinvetmab 5
Trilostane 4
Estriol Tablets 4
Fluralaner Chew Tablets 4
Carprofen 3
Cyclosporine 3
Nitenpyram 3
Moxidectin 3
Phenylpropanolamine 2
Ketoconazole 2
Prednisone 2
Insulin Injectable Vial 2
Cefpodoxime Proxetil 2
Imidacloprid + Moxidectin 2

Mammary gland neoplasm NOS Reaction Insights

124 reports name Mammary gland neoplasm NOS; 40 recorded a death outcome (32.3% of reported events, not a population-level mortality rate). VeDDRA code: 529.

By species: Dog (110 reports), Cat (12 reports), Ferret (1 reports). By breed: Retriever - Labrador (12), Crossbred Canine/dog (9), Beagle (6).

Most co-reported drugs: Oclacitinib Maleate (27 reports), Milbemycin Oxime + Spinosad (19 reports), Spinosad (8 reports), Ivermectin + Pyrantel As Pamoate Salt (7 reports).

Read these counts as reporting volume, not risk: per our methodology, co-reporting reflects temporal association captured in voluntary submissions, not proof that a drug caused this reaction. A widely-prescribed drug will rack up more raw co-reports at an identical true rate than a rarely-used one, so compare within similar-exposure products.

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.