Reaction profile

The FDA adverse-event record for application site blister

343 FDA adverse-event reports reference application site blister (VeDDRA 4). See the species, breeds, and drugs most associated with it below.

343
reports citing this reaction
1.7%
death-coded share
Cat
most-affected species
Selamectin
most-associated drug
Verify with FDA CVM →
343
Total Reports
6
Deaths
1.7%
Death Rate

Species Most Affected

Cat 206
Dog 82
Horse 37
Cattle 10
Human 8

Breeds Most Affected

Domestic Shorthair 136
Quarter Horse 14
Domestic Longhair 14
Domestic Mediumhair 12
Cat (other) 12
Retriever - Labrador 10
Unknown 8
Maine Coon 6
Horse (unknown) 6
Crossbred Canine/dog 6

Associated Drugs

Selamectin 83
Imidacloprid + Moxidectin 50
Selamectin;Sarolaner 42
Fluralaner Spot-On Solution 35
Ivermectin(1.55%)/Praziquantel(7.75%) Paste 24
Ivermectin + Praziquantel 12
Emodepside + Praziquantel 11
Eprinomectin + Esafoxolaner + Praziquantel 9
Fipronil 10%/S Methoprene 9% Spot On 7
Flunixin Megl Topical Solution 7
Genta/Momet/Clotrim Ear Oint 6
Mirtazapine 6
Ivermectin + Pyrantel As Pamoate Salt 5
Prednisone 5
Fluralaner/Moxidectin Spot-On 5
Gabapentin 4
Imidacloprid, Flumethrin 4
Vaccine 3
Shampoo 3
Nitenpyram 3

Application site blister Reaction Insights

343 reports name Application site blister; 6 recorded a death outcome (1.7% of reported events, not a population-level mortality rate). VeDDRA code: 4.

By species: Cat (206 reports), Dog (82 reports), Horse (37 reports). By breed: Domestic Shorthair (136), Quarter Horse (14), Domestic Longhair (14).

Most co-reported drugs: Selamectin (83 reports), Imidacloprid + Moxidectin (50 reports), Selamectin;Sarolaner (42 reports), Fluralaner Spot-On Solution (35 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.