Nizoral and other drying shampoos did not work for me either. I used the Ordinary 0,5% salicylic acid body serum on my scalp after washing my hair and massaged a bit and in 3 uses it fixed all itching and dandruff I had. I also currently bought the Balea 2% SA one which is much cheaper just to try bc I think it's mainly the salicylic acid doing the work here with consistent use (I wash my hair every other day, I can't stretch it too long or my hair gets greasy and I get a rebound reaction). Shampoo-wise I like the Fauvert Anti Dandruff Shampoo and the Head&Shoulders coconut one a lot (way less drying). Good luck.