06/20/2026
IMPORTANT!!
Almost 100% of pets exposed to minoxidil required hospitalization in a recent report, and all reported deaths occurred in cats. Most cats were exposed through contact with treated humans, including licking their owner's skin or exposure to contaminated bedding, while most dogs were exposed through exploratory behavior, such as rummaging through trash.
Minoxidil is a commonly used hair regrowth medication, but it can be highly toxic to pets. Signs of poisoning may develop within 30 minutes of exposure and include loss of appetite, lethargy, difficulty breathing, weakness, rapid heart rate, and fluid accumulation in the lungs.
Of the 94 reported cases reviewed, 68 involved cats and 26 involved dogs. Approximately 15% of exposed cats died, highlighting their increased susceptibility to minoxidil toxicity.
Pet owners using minoxidil should take precautions to prevent exposure. Wash hands thoroughly after application, prevent pets from licking treated skin, avoid allowing pets access to contaminated pillows or bedding, and store products securely out of reach.
Any suspected exposure should prompt immediate veterinary attention.
McMullen E, Xiong G, Rayner DG, et al. Minoxidil toxicosis in cats and dogs: A scoping review and call to action. J Am Acad Dermatol. 2025
