Hello Dr. Lin, i have been on Propecia 1 mg for 11 months. I see a lot of side effects that after 7 month of quit i am also experimenting. I am very worried about this and i think i will be live with this all my life. The side effects are: Loss of libido, erection problems, impotence, low sperm ejaculation and a lot of pain in testicles, pelvic and lower back. Could this pains be for the finasteride? Thanks and i hope you can help me.