Is Addium Viagra for the Brain ? 3 years ago an actor from the movie Limitless gave a social media shout out (Tweet in Gallery ) including the pharmaceutical drug Addium for it’s inspiration. Now today in 2015 this is a world wide drug used by athletes, executives and students. Some companies claimed that it was too strong to be sold without a prescription. It was kept quiet all this time even being removed from questions on the game show Jeopardy.