21/10/2026
Minoxidil is the active ingredient in Regaine, and other hair regrowth foams, solutions and serums and in minoxidil tablets. Cats are extremely sensitive to it, exposure results in severe acute heart failure, blood pressure collapse, fluid flooding the lungs and chest.
THE THREE ROUTES
🐾Your skin – Cats lick their owner’s scalp, hairline, hands or forearms (The most common way cats are poisoned)
🐾Your bed – Residue transfers onto pillowcases & sheets overnight and your cat lies on it, then grooms themselves
🐾A spill or the bin – Cats have died after knocking a bottle onto their own coat or chewing a used applicator out of the bin
Seek emergency care immediately, don’t wait and watch. Signs can start within 30 minutes or be delayed for hours:
❗️Fast, shallow or laboured breathing
❗️Lethargy, hiding, weakness or collapse
❗️Gone off food or vomiting
❗️Cold to touch, especially ears and paws
❗️Pale, grey or blue gums
❗️Any known contact with the product
Any known or suspected exposure is an emergency even if your cat seems fine. Tell the vet what product was involved and bring the bottle if you can. Always mention that you have this medication at home even if you think your cat has had no access.