Thanks for posting your concern at Healthcaremagic. Dandruff/seborrheic dermatitis is an important cause of increased hair shedding. In addition to that, Minoxidil solution has an alcoholic base and may cause dryness/scaling of the scalp. Anyways minoxidil wont help unless you control the dandruff effectively. If I was your treating doctor I would have asked you to use an antidandruff lotion/shampoo e.g 2% ketoconazole shampoo(salisia-kt shampoo), thrice weekly for 2-4 weeks followed by once or twice weekly for maintenance. It is available OTC. If that seems insufficient then I would suggest that you see a dermatologist. Your dermatologist might prescribe you a topical steroid lotion, to be applied twice daily for 2 weeks. The topical steroid lotion can be stopped once the dandruff is significantly controlled and thereafter the improvement can be sustained with just an antidandruff lotion. regards