Here is an amazon link to the ketoconazole shampoo I use. I only use it once a week, take finasteride 1mg once a day.
https://www.amazon.com/Regenepure-Shampoo-Treatment-Supports-Growth/dp/B0032FSDOA?th=1
https://www.amazon.com/Regenepure-Shampoo-Treatment-Supports-Growth/dp/B0032FSDOA?th=1