As a physician, my patients teach me something on a regular basis. This is one of those stories.
I had a patient who came to see me for hair loss. When I encouraged her to use Rogaine, she explained that she was hesitant because she had cats. I assured her that I have 2 cats and have used Rogaine on a daily basis for years with no problem. However, I did tell her I would look into her concern. What I found really surprised me.
What I found were lots of references to this on social media, particularly TikTok. But one real article as well.
Here’s where the real science comes in… In a 2021 article form the Journal of American Animal Hospital Association (https://pubmed.ncbi.nlm.nih.gov/34370845/), they discussed the effects of Minoxidil on dogs and cats. The article cited 211 cases of toxicoses in dogs and cats over an 18 year period from the Animal Poison Control Database. 1When investigating a portion of these cases further, they indicated that for cats the most common exposure was unintentional from a cat licking an owners skin or pillowcase or from cats licking up spilled medication. For dogs, the most common exposure was “exploratory” such as routing through trash.
In additional to milder symptoms, death can occur. According to a more recent article in Practical Dermatology in 2023 (https://practicaldermatology.com/news/vets-warn-that-minoxidil-may-be-deadly-to-pets/2461917/ ), “Signs of poisoning in cats include anorexia, vomiting, lethargy, dyspnea, pulmonary edema, pleural effusion, hypothermia, and cyanosis. For dogs, signs include lethargy, vomiting, bounding pulses, increased heart rate and low blood pressure. Signs usually occur within 45 minutes to a few hours.”
So there you have it. Personally, I will continue using Rogaine because I’m vain. But, I will be much more cautious with my Rogaine in the future and make sure I dispose of the canister in a secure way. If you think your pet is exposed to Rogaine or any other form of Minoxidil, it is prudent to take them to the vet right away.
By the way, I called my patient and personally thanked her for educating me.