WARFARIN ("Rat Bait") POISONING

General Information:

Warfarin is used as a poison for rodents in many "rat poisons". It interferes with normal blood clotting and results in fatal hemorrhage. Dogs and cats may eat warfarin disguised in rodent bait or eat rodents poisoned by warfarin.

Though eating small amounts of warfarin is common, fatal poisoning is uncommon because pets must either consume a large single dose or multiple small doses over time.

Dr. Dave's Note: Two newer types of poisons found in rodent baits are hundreds of times stronger and more deadly than warfarin. These require immediate and longer therapy.

Signs of warfarin toxicity include:

Bleeding in the skin, gums or eyes;

Blood in the stools and/or urine;

Breathing may be labored; and,

Your pet may be depressed.

Treatment Information:

Only severe cases of warfarin poisoning require hospitalization. Vitamin K counteracts warfarin and is given by injection or by mouth, depending on the severity of the poisoning. With the newer types of poisons, the oral Vitamin K needs to be administered for approximately 4 weeks.

If a severe poisoning has occurred (severe hemorrhage), a blood transfusion may be required to save your animals life.

Give all medication as directed. Call your veterinarian's office if you cannot give the medication.

Notify your veterinarian's office if you observe any of the following:

* Your pet seems weak or depressed.

* Your pet bleeds from the nose or mouth, or there is blood in the urine or stools.

* Your pet has hemorrhages (bruising) on the skin or in the eyes.

We hope that you will find this information helpful in your quest for better pet care. If you have any questions or comments, please call your veterinarian's office, or feel free to e-mail us.

David E. Hammett, DVM
and the Staff of All Creatures Veterinary Clinic, PC