Showbread. 2% is by prescription only, in the US. You can try out the 1% concentration OTC, though. It's at CVS/Walgreens/Walmart. Nizoral. It's very gentle (good for all hair types), yet effective. I used this as prophylaxis against infecting my scalp w/ringworm fungus when I had it all over my arms (stupid cat's fault). While I don't have curly hair, it did keep my color-treated hair very soft/shiny.
Another option is Selsun Blue w/the active ingredient selenium sulfide (make sure to read the label- one of their newer lines just contains the same zinc-based ingredient as Head & Shoulders instead of selenium sulfide, which, isn't bad either, but you do pay more under this brand for it). Ketoconazole & selenium sulfide are both gentle & excellent for scalp health/reducing flaking & fungus.
You can use your usual conditioner w/either of these products. Another option is using the Head & Shoulders brand conditioner in conjunction w/Nizoral or Selsun Blue shampoo. They're formulated to work well w/antidandruff products, and most of the H&S conditioners also contain zinc-based ingredients to help fight fungus & flakes.
You could also try adding this to your hair while showering or apply overnight as a leave-in treatment once or twice a week, but it's pretty oily. It does contain a junkload of tea tree oil, which is a powerful natural antifungal - it'll help murder all those excess yeasts trying to take up residence on your head.
If you're worried about wasting $ on trying new stuff, I recommend buying these items at CVS or Walgreens. Both stores have a beauty guarantee - you can return anything you buy if you're not satisfied, for a full refund. This includes online purchases. You can take them right to the store w/the invoice for a refund. I do it all the time. Or did, before I found my current go-to products.