Propecia/finasteride
You could get impotence, weakness, frustration, swelling or tenderness in the breasts, unusual ejaculation, swelling in the feet or hands, runny nose, dizziness, problem having an orgasm, skin breakout or loss of interest in sex when you start the use of Propecia and will have to speak with your medical professional regarding ways of handling those.
Propecia should be taken specifically as suggested by the physician at normal intervals.