I haven't been on oral minoxidil for long enough to gauge its effectiveness. Dermarolling won't boost oral minoxidil effectiveness. You would need topical for that to be absorbed by the wounds. You don't need a minoxidil boost. 10mg is already a very high dose for MBP. 5mg is the limit for baldness in the literature.
Yeah i have read studies that use only 0.6mg oral minoxidil and still getting success, but other than water retention i don't get any sides from 10mg so im just sticking with it. Think i might drop the topical beginning of next year when i either restart spironolactone or perhaps try bica, not sure yet.