Minimum effective dose of Propecia

[Hairforever]

I am contemplating taking Propecia again after a gap of 3 years owing to side-effects. I abused the dosage last time in that I took 2 pills a day (one in the morning and one in the evening). I could live with watery seman and lack of morning wood but the soft erections were worrying and even worse than that I ended up with some gyno (I later had liposuction). So as you can appreciate I am tentative about taking it again.

This time I'm thinking about taking half a Propecia pill a day. Would this still be effective in combating DHT? Or perhaps one pill every other day?

Any thoughts?