This is slightly related- I have seborheic dermatitis, on my face and scalp. At one point, my doctor precribed a keto foam to treat it. It cleared up fast, and was very effective. I used it once daily. About a month later, the seb derm came back, worse than ever before. Down the road I wound up clearing it with apple cider vinegar. this has had a much more permanent, lasting effect.
Given, seb derm and hairloss are different. Nevertheless, I only use nizoral twice a week based on my experiences.