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Iron Toxicity in Dogs and Cats
Veterinary & Aquatic Services Department, Drs. Foster & Smith
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Toxin
Iron

Source
Nutritional supplements such as vitamin-mineral preparations with iron, injections of iron, and plant fertilizer.

General Information
Ingestion of excess iron causes two main problems. Iron has a direct corrosive effect on the lining of the stomach and small intestines. This may range from slight bleeding to perforation. Iron also is absorbed into the cells where it disrupts cell function and causes cell damage.

An anaphylactic type of reaction may be seen with injectable iron.

Toxic Dose
Varies depending on source and route of exposure.

Signs
Vomiting and diarrhea which may be bloody, and drowsiness. Symptoms may not occur for up to 6-12 hours after ingestion. This may be followed by a period of apparent recovery before relapse occurs. Other symptoms include CNS depression and liver and kidney failure. Iron passed in the urine will cause the urine to be dark.

Immediate Action
Induce vomiting and administer Milk of Magnesia (to precipitate the iron in the GI tract to decrease absorption). Egg, water, or milk may also be given. Seek veterinary attention.

Veterinary Care
General treatment: The induction of vomiting may be continued, gastric lavage is performed, and Milk of Magnesia is administered.

Supportive treatment: IV fluids, oxygen, and blood transfusions may be administered. Iron levels will be monitored for several days.

Specific treatment: Deferoxamine (Desferal) may be administered which chelates the iron. This chelation will cause a reddish brown discoloration of the urine. Vitamin C may be used with deferoxamine to enhance iron chelation, but should not be used without deferoxamine as it will increase the absorption of the iron by the body.

Prognosis
Variable

 

Keep this and all other medications out of the reach of children and pets.


If you think your pet has been poisoned...

Contact your veterinarian or one of the Animal Poison Hotlines (listed below) if you think your pet may have accidentally received or been given an overdose of the medication.

**ASPCA National Animal Poison Control Center

1-888-4ANI-HELP (1-888-426-4435). $65.00 per case, billed to caller's credit card.

Follow-up calls can be made for no additional charge by dialing 888-299-2973.

There is no charge when the call involves a product covered by the Animal Product Safety Service.

**Pet Poison Helpline - 24-hour service available throughout North America for pet owners and veterinary professionals who require assistance with treating a potentially poisoned pet.

1-800-213-6680 ($35.00 per incident). Staffed 24-hours a day.


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