Yes, my hair did grow back, but was really slow. For example, I normally shave everyday, I could go every other day.
Everyone is different. Most common side effects are rash from barely noticeable to unbearable, diarrhea, and hair grows more course. Dosage varies, 150mg - 50mg. Appearance of the rash is not proof it is working. Do not take blood thinners with it or drink or eat grapefruit.
There is a website that covers it all.