If They’re Going to Show Up, How Long Until Propecia Side Effects Are Present?

Hello Doc,

I have been on Propecia (1mg/day) for 2 months the first time and then stopped it for a couple of months and started to take it again and its been about 3-4 months now.

My questions is how long does it take for someone to notice the side effects of Propecia like the sexual side effects, etc? And once we notice it and decide to quit Propecia, are the side effects reducable?

If they are going to appear, sexual side effects from Propecia usually come in within the first month or so. They will go away after another month or so upon stopping the pill.