How to reverse male impotence naturally?

Smoked pot for a while and began having trouble with sustaining erections

stop smoking pot for one, exercise more, eat oatmeal(this frees up testosterone), eat less saturated fat, stop smoking cigerrettes, watch pornos. This might be a symptom of a poor circulation problem which could mean heart failure so it might not be a bad idea to have your cholesterol and blood pressure checked.

Doesn't mean the pot did it. A doctor will have to diagnose it correctly.

Shock Treatment!