It is not recommended to apply minoxidil immediately after derma rolling, as the micro-injuries in the stamp or roller can increase the absorption of minoxidil and potentially lead to skin-related side effects.
It is best to wait at least 6-8 hours after derma rolling before applying minoxidil to allow your skin to rejuvenate.
Watch this video to learn everything about Derma Roller, Pen, and Stamp.