Drug profile

The FDA adverse-event record for Pentoxifylline

58 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Pentoxifylline. See the species affected, top reactions, and outcomes below.

58
adverse-event reports
12.1%
death-coded share
Dog
most-reported species
17
Diarrhoea - top reaction
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Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
58
Total Reports
7
Deaths Reported
12.1%
Death Rate

Active Ingredients

Pentoxifylline

Administration Routes

OralUnknown

Species Affected

Dog 58

Most Affected Breeds

Boxer (German Boxer) 4
Retriever - Labrador 4
Crossbred Canine/dog 4
Beagle 3
Pit Bull 3
Maltese 3
Terrier (unspecified) 3
Terrier - Bull - Miniature 3
Shepherd Dog - German 3
Shar Pei 2

Most Reported Reactions

Diarrhoea 17
Vomiting 13
Lethargy (see also Central nervous system depression in Neurological) 11
Crust 9
Erythema (for urticaria see Immune SOC) 8
Decreased appetite 7
Death by euthanasia 7
Anorexia 7
Weight loss 7
Elevated alanine aminotransferase (ALT) 7
Elevated gamma-glutamyl transferase (GGT) 7
Loose stool 7

Outcome Breakdown

Outcome Unknown
21 (36.2%)
Recovered/Normal
18 (31.0%)
Ongoing
12 (20.7%)
Euthanized
7 (12.1%)

Pentoxifylline Adverse Event Insights

58 reports name Pentoxifylline; 7 recorded a death outcome (12.1% of reported events, not a population-level mortality rate). Active ingredient: Pentoxifylline. Administration routes: Oral, Unknown.

By species: Dog (58 reports). By breed: Boxer (German Boxer) (4), Retriever - Labrador (4), Crossbred Canine/dog (4).

Leading clinical signs: Diarrhoea (17), Vomiting (13), Lethargy (see also Central nervous system depression in Neurological) (11), Crust (9). Outcome, 58 coded reports: Outcome Unknown leads at 36.2%.

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

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.