I am also experiencing thinning hair on Exemestane - only on it for 6 months for the hair loss to show up. Every time I wash my hair, it comes out in handfuls in the drain. I am afraid at this rate, I will have no hair at the end of 5 months. What are the ingredients in Viviscal? Is it estrogenic? Others are promoting Nutrafol - it has a herbal formula that may interfere with AIs. Afraid to take a hair supplement. Right now - applying rosemary oil topically.