Reaction profile

The FDA adverse-event record for photosensitivity

28 FDA adverse-event reports reference photosensitivity (VeDDRA 955). See the species, breeds, and drugs most associated with it below.

28
reports citing this reaction
7.1%
death-coded share
Dog
most-affected species
Milbemycin Oxime + Spinosad
most-associated drug
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28
Total Reports
2
Deaths
7.1%
Death Rate

Species Most Affected

Dog 21
Cat 3
Horse 2
Cattle 1
Human 1

Breeds Most Affected

Schnauzer - Miniature 2
Retriever - Labrador 2
Hound (unspecified) 2
Domestic Shorthair 2
Pointer (unspecified) 1
Retriever - Golden 1
Quarter Horse 1
Beagle 1
Terrier - Bull - Staffordshire 1
Paint 1

Associated Drugs

Milbemycin Oxime + Spinosad 7
Oclacitinib Maleate 5
Spinosad 2
Enrofloxacin 2
Afoxolaner 2
Lotilaner 2
Ivermectin 1
Vitamins 1
Probiotic (Unknown) 1
Milk Thistle 1
Omeprazole 37% Oral Paste 1
Febantel + Praziquantel + Pyrantel Pamoate 1
Flumethrin-Imidacloprid 1
Amoxicillin Trihydrate/Clavulanate Potassium 1
Flunixin Meglumine 1
Fluids 1
Hydroxyzine 1
Milbemycin Oxime 1
Imidacloprid + Permethrin + N-Methylpyrolidone 1
Afoxolaner 11.3 Mg Chewable Tablets 1

Photosensitivity Reaction Insights

28 reports name Photosensitivity; 2 recorded a death outcome (7.1% of reported events, not a population-level mortality rate). VeDDRA code: 955.

By species: Dog (21 reports), Cat (3 reports), Horse (2 reports). By breed: Schnauzer - Miniature (2), Retriever - Labrador (2), Hound (unspecified) (2).

Most co-reported drugs: Milbemycin Oxime + Spinosad (7 reports), Oclacitinib Maleate (5 reports), Spinosad (2 reports), Enrofloxacin (2 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.