Do you know what is the best way to slowly get of minoxidil (e.g. with gradual decrease in dosage/ concentration application)?

There is no easy way. If you can find another treatment that works you might not notice as much shedding but other than that going off minoxidil slowly will jist delay the time it takes for all the newly grow hairs tfall back out. Regardless of whether you stop quickly or slowly... you’ll likely look the same either way in 2 years.

Hair becomes addicted to the drug minoxidil if it grew the hairs. Normal hair does not get addicted. There is no way to see which hairs will come out when you stop the drug unless you stop the drug