Endovex As for when you should buy Extagen, you should buy it when there are no other factors in the way. You should buy it if you are willing to wait six months to achieve results. Why six months and not instantly? That's because nothing that is real will work instantly unless it is Viagra and Viagra is not for male enhancement but for impotence issues. Waiting for six months is much better than not getting results at all from some of the Male Enhancement Supplements out there that deliver no results at all.