caffeine doesn't mix well with the chemicals you smoke in marijuana....and the THC makes you have delerious judgments about how those chemicals are all reacting with the caffeine...I only recommend energy drinks for people that take a lot of downers and are prone to fall asleep...like if you take 3 or 4 blue xanaxes in one day and feel all tired and sleepy, drink a sobe or a red bull and take 3 ibuprofen...picks you right back up...