'Hair cure of the human' may harm cats

Dec 2005

You've probably heard of people using "hair of the dog" in an attempt to fight a hangover, but did you know that a "hair cure of the human" can actually harm or kill an unsuspecting cat?

Topical solutions containing minoxidil (like Rogaine) are used to safely promote hair growth in humans, but pose serious health risks to cats. This occurs when the product has been applied intentionally to areas of hair loss on the cat or where they were accidentally exposed to the solution via licking their human family member's scalp or accidentally walking through the solution if spilled.

Since 2001, six cases involving minoxidil exposure were reported by the ASPCA Animal Poison Control Center. Of these cases, four of the cats died, while two fully recovered after prompt and aggressive veterinary treatment.

Dr. Sharon Gwaltney-Brant, APCC medical director and veterinary toxicologist says: "Pet owners need to be aware that even minimal amounts of minoxidil can result in a serious or even fatal situation."

According to APCC data, clinical signs include lethargy, a severe drop in blood pressure, accumulation of fluid in the lungs and damage to the heart muscle, which can result in death from cardiac failure. "The lethargy and blood pressure drop typically develop in about 12 hours," says Gwaltney-Brant, "and the cardiac effects generally occur three to four days following exposure if treatment is not sought quickly."

While the potential for clinical problems exists for dogs and other animals, cats may be especially sensitive because they lack a specific enzyme necessary for breaking this drug down in their bodies.

APCC experts offer the following tips to avoid accidental poisoning:

* Never apply minoxidil products to your pets.

* Human application of the product should occur in a room that is not accessible to pets; do not let pets lick treated areas.

* Clean up any spills thoroughly and promptly.

If you suspect that your cat has come into contact with a minoxidil-containing product, or any other potential poison, contact your veterinarian