Reaction profile

The FDA adverse-event record for liver fibrosis

36 FDA adverse-event reports reference liver fibrosis (VeDDRA 490). See the species, breeds, and drugs most associated with it below.

36
reports citing this reaction
69.4%
death-coded share
Dog
most-affected species
Spinosad
most-associated drug
Verify with FDA CVM →
36
Total Reports
25
Deaths
69.4%
Death Rate

Species Most Affected

Dog 32
Cat 2
Cattle 1
Horse 1

Breeds Most Affected

Shepherd Dog - German 3
Schnauzer - Miniature 2
Beagle 2
Terrier - Bull - American Pit 1
Cattle Dog - Australian (blue heeler, red heeler, Queensland cattledog) 1
Spaniel - Springer (unspecified) 1
Poodle - Standard 1
Pinscher - Miniature 1
Cattle (unknown) 1
Rottweiler 1

Associated Drugs

Spinosad 6
Milbemycin Oxime + Spinosad 5
Carprofen 4
Fluralaner 13.64% 12-Week Chew 3
Moxidectin 2
Firocoxib 2
Gabapentin 2
Afoxolaner 2
Doxycycline 2
Fluralaner Chew Tablets 2
Ivermectin/Pyrantel Pamoate Chewable 272Mcg/652Mg 1
Canine Adenovirus Type 2, Strain Manhattan, 12-13-76; Canine Distemper Virus, St 1
Leptospira Canicola L-15 Strain C-51; Leptospira Grippotyphosa 1550 Lot 10005 St 1
Dinotefuran, Pyriproxyfen 1
Pyrantel Pamoate 1
Bordetella Bronchiseptica, Strain 78-9159, Kb 1
Firocoxib 57 Mg Chewable 1
Monensin Sodium 1
Firocoxib 227 Mg Chewable 1
Sam-E, Silybin, Vitamin E, Zinc 1

Liver fibrosis Reaction Insights

36 reports name Liver fibrosis; 25 recorded a death outcome (69.4% of reported events, not a population-level mortality rate). VeDDRA code: 490.

By species: Dog (32 reports), Cat (2 reports), Cattle (1 reports). By breed: Shepherd Dog - German (3), Schnauzer - Miniature (2), Beagle (2).

Most co-reported drugs: Spinosad (6 reports), Milbemycin Oxime + Spinosad (5 reports), Carprofen (4 reports), Fluralaner 13.64% 12-Week Chew (3 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.