Grey Matters: Just Enhancement

This article talks about pharmaceuticals that enhance the abilities of people, from having better memorization skills to being awake longer. All of these drugs raise the questions of whether these substances should be banned to all but the sick/elderly or whether they should be distributed everywhere and available for use to everyone, regardless of mental and physical condition. Moreover, if we allow everyone on the planet to take these drugs, will the playing field gap increase or decrease. Lastly, should enhancement medicine be allowed to be researched further and further until taking these enhancement drugs become a part of our daily routine?