Topical minoxidil can be dangerous to cats, even with accidental exposure, and users should be cautious to prevent poisoning. Proper precautions, like washing hands and preventing cats from licking treated areas, are essential to minimize risk.
Oral minoxidil caused dark circles and visible veins for the user, who responded quickly to the treatment but lowered the dose to reduce side effects. Despite using finasteride and tretinoin, the user is considering stopping minoxidil if the side effects persist.