Reaction profile

The FDA adverse-event record for increased bowel movements (frequency)

292 FDA adverse-event reports reference increased bowel movements (frequency) (VeDDRA 2231). See the species, breeds, and drugs most associated with it below.

292
reports citing this reaction
4.5%
death-coded share
Dog
most-affected species
Milbemycin Oxime + Spinosad
most-associated drug
Verify with FDA CVM →
292
Total Reports
13
Deaths
4.5%
Death Rate

Species Most Affected

Dog 271
Cat 15
Human 4
Horse 2

Breeds Most Affected

Crossbred Canine/dog 23
Retriever - Labrador 22
Dog (unknown) 16
Maltese 13
Chihuahua 11
Spaniel - King Charles Cavalier 9
Shepherd Dog - German 9
Shih Tzu 8
Domestic Shorthair 8
Shepherd Dog - Australian 8

Associated Drugs

Milbemycin Oxime + Spinosad 27
Ivermectin + Pyrantel As Pamoate Salt 25
Fluralaner Chew Tablets 25
Milbemycin Oxime + Praziquantel 17
Trilostane 16
Afoxolaner 14
Carprofen 12
Febantel + Praziquantel + Pyrantel Pamoate 12
Pyrantel Pamoate;Sarolaner 12
Oclacitinib Maleate 11
Fluralaner 13.64% 12-Week Chew 11
Grapiprant 9
Selamectin 8
Bedinvetmab 8
Spinosad 7
Sarolaner 7
Lotilaner 7
Fenbendazol Granules 6
Prednisone 6
Pimobendan 6

Increased bowel movements (frequency) Reaction Insights

292 reports name Increased bowel movements (frequency); 13 recorded a death outcome (4.5% of reported events, not a population-level mortality rate). VeDDRA code: 2231.

By species: Dog (271 reports), Cat (15 reports), Human (4 reports). By breed: Crossbred Canine/dog (23), Retriever - Labrador (22), Dog (unknown) (16).

Most co-reported drugs: Milbemycin Oxime + Spinosad (27 reports), Ivermectin + Pyrantel As Pamoate Salt (25 reports), Fluralaner Chew Tablets (25 reports), Milbemycin Oxime + Praziquantel (17 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.