erectile dysfunction
"I got a 20mg sample from my doctor, and following his advice, I cut the tablet in half for 10mg. Although effective, I experienced troublesome side effects. Fast heartbeat, low blood pressure, headache, muscle pain, back pain, ringing in the ears, and abnormal orgasm. (Orgasm happened a few seconds before I could feel it) On the plus side, it seems to be a powerful medicine, but it is not right for me. I will try a lower dose of a less powerful medication."