Drug profile

The FDA adverse-event record for Iron

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

31
adverse-event reports
19.4%
death-coded share
Dog
most-reported species
6
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.
31
Total Reports
6
Deaths Reported
19.4%
Death Rate

Active Ingredients

Iron

Administration Routes

UnknownOralParenteral

Species Affected

Dog 13
Cat 8
Human 6
Pig 3
Cattle 1

Most Affected Breeds

Unknown 9
Domestic Shorthair 4
Cat (unknown) 2
Chihuahua 2
Retriever - Labrador 2
Spitz - American Eskimo Dog 1
Holstein-Friesian also known as Holstein 1
Pig (unknown) 1
Domestic (unspecified) 1
Collie - Border 1

Most Reported Reactions

Diarrhoea 6
Decreased haematocrit 6
Decreased red blood cell count 5
Death 4
Lack of efficacy - NOS 4
Death by euthanasia 4
Lethargy (see also Central nervous system depression in 'Neurological') 3
Accidental exposure 3
Cough 3
Other abnormal test result NOS 3
Immune mediated haemolytic anaemia 3
Weight loss 3

Outcome Breakdown

Outcome Unknown
15 (42.9%)
Recovered/Normal
8 (22.9%)
Died
4 (11.4%)
Ongoing
4 (11.4%)
Euthanized
4 (11.4%)

Iron Adverse Event Insights

31 reports name Iron; 6 recorded a death outcome (19.4% of reported events, not a population-level mortality rate). Active ingredient: Iron. Administration routes: Unknown, Oral, Parenteral.

By species: Dog (13 reports), Cat (8 reports), Human (6 reports). By breed: Unknown (9), Domestic Shorthair (4), Cat (unknown) (2).

Leading clinical signs: Diarrhoea (6), Decreased haematocrit (6), Decreased red blood cell count (5), Death (4). Outcome, 35 coded reports: Outcome Unknown leads at 42.9%.

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.