
Cannabis use does not increase actual creativity but does increase how creative you think you are, study finds
A set of studies published in the Journal of Applied Psychology has failed to find evidence that cannabis has creativity-enhancing effects. But the researchers did find that cannabis elicited a sense of joviality, which in turn made cannabis users perceive their own ideas and the ideas of others...

As expected, participants in the cannabis use condition were more likely to feel “happy” and “joyful” compared to those in the control condition. Those who had consumed cannabis also rated their own ideas as more creative — an effect that was associated with their improved mood. Unexpectedly, however, this state of joviality did not translate into increased creativity. That is, the independent raters found the ideas that had been generated by those in the cannabis condition to be just as creative as those in the control condition.
“Cannabis probably won’t actually make you any more or less creative,” Barnes told PsyPost.
This has been throughout history. "I play/fight/talk/game/workout/do better, when I use "X-stimulant" beforehand."