I lost more hair when I was taking it, and it scared me into stopping. Most will say stay the course for at least a year to see the benefit.
I decided I didn't want to take a pill the rest of my life. I think the accumulative effect of taking a drug for the rest of your life is very toxic to your body. I had to have a lump taken out of my right chest muscle because of it too.
I can't speak for the great things that drug has done for people, but my experience wasn't very good.