Reaction profile

The FDA adverse-event record for anal irritation

198 FDA adverse-event reports reference anal irritation (VeDDRA 2059). See the species, breeds, and drugs most associated with it below.

198
reports citing this reaction
4.0%
death-coded share
Dog
most-affected species
Milbemycin Oxime + Spinosad
most-associated drug
Verify with FDA CVM →
198
Total Reports
8
Deaths
4.0%
Death Rate

Species Most Affected

Dog 180
Cat 18

Breeds Most Affected

Retriever - Labrador 16
Crossbred Canine/dog 14
Domestic Shorthair 12
Retriever - Golden 12
Shepherd Dog - German 11
Beagle 10
Chihuahua 9
Dog (unknown) 9
Dachshund (unspecified) 8
Terrier - Yorkshire 6

Associated Drugs

Milbemycin Oxime + Spinosad 26
Ivermectin + Pyrantel As Pamoate Salt 18
Imidacloprid + Moxidectin 13
Carprofen 11
Ivermectin/Pyrantel Pamoate Chewable 272Mcg/652Mg 9
Afoxolaner 9
Milbemycin 8
Fluralaner Chew Tablets 8
Febantel + Praziquantel + Pyrantel Pamoate 7
Fluralaner 13.64% 12-Week Chew 6
Spinosad 5
Ivermectin/Pyrantel Pamoate Chewable 136Mcg/326Mg 5
Ivermectin/Pyrantel Pamoate Chewable 68Mcg/163Mg 5
Oclacitinib Maleate 5
Milbemycin Oxime + Praziquantel 5
Cefovecin 4
Lufenuron + Milbemycin Oxime 4
Emodepside + Praziquantel 4
Gabapentin 4
Milbemycin, Lufenuron 3

Anal irritation Reaction Insights

198 reports name Anal irritation; 8 recorded a death outcome (4.0% of reported events, not a population-level mortality rate). VeDDRA code: 2059.

By species: Dog (180 reports), Cat (18 reports). By breed: Retriever - Labrador (16), Crossbred Canine/dog (14), Domestic Shorthair (12).

Most co-reported drugs: Milbemycin Oxime + Spinosad (26 reports), Ivermectin + Pyrantel As Pamoate Salt (18 reports), Imidacloprid + Moxidectin (13 reports), Carprofen (11 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.