Reaction profile

The FDA adverse-event record for spleen and reticulo-endothelial system disorder nos

390 FDA adverse-event reports reference spleen and reticulo-endothelial system disorder nos (VeDDRA 182). See the species, breeds, and drugs most associated with it below.

390
reports citing this reaction
50.3%
death-coded share
Dog
most-affected species
Trilostane
most-associated drug
Verify with FDA CVM →
390
Total Reports
196
Deaths
50.3%
Death Rate

Species Most Affected

Dog 356
Cat 26
Cattle 4
Chicken 1
Horse 1
Goat 1
Mouse 1

Breeds Most Affected

Retriever - Labrador 60
Domestic Shorthair 21
Retriever - Golden 21
Beagle 20
Crossbred Canine/dog 20
Shepherd Dog - German 15
Boxer (German Boxer) 15
Shepherd Dog - Australian 13
Shih Tzu 11
Chihuahua 9

Associated Drugs

Trilostane 60
Carprofen 53
Milbemycin Oxime + Spinosad 49
Spinosad 32
Afoxolaner 25
Maropitant Citrate 21
Grapiprant 20
Deracoxib 19
Fluralaner Chew Tablets 19
Polysulfated Glycosaminoglycan 18
Prednisone 17
Gabapentin 16
Tramadol 15
Oclacitinib Maleate 15
Ivermectin + Pyrantel As Pamoate Salt 12
Enrofloxacin 10
Moxidectin 10
Firocoxib 10
Cyclosporine 10
Milbemycin Oxime + Praziquantel 10

Spleen and reticulo-endothelial system disorder NOS Reaction Insights

390 reports name Spleen and reticulo-endothelial system disorder NOS; 196 recorded a death outcome (50.3% of reported events, not a population-level mortality rate). VeDDRA code: 182.

By species: Dog (356 reports), Cat (26 reports), Cattle (4 reports). By breed: Retriever - Labrador (60), Domestic Shorthair (21), Retriever - Golden (21).

Most co-reported drugs: Trilostane (60 reports), Carprofen (53 reports), Milbemycin Oxime + Spinosad (49 reports), Spinosad (32 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.