At the age of twenty five, my hair was beginning to thin. At once I visited a Dr. and told him about my problem and said that I not wanting to look like my brother and dad, and doctor said that may recommend to me Propecia. I noticed that with this drug my hair were better, when I miss a dose of it I saw little bits of my hair fall into my book or paper! Yes, this medication is expensive. But was one side effects a slight decrease in my sex drive. But I know good medicine for erection, it is Cialis. This drug works good and fast.