To much could make you hypo, your doc is saying dont drink buckets full , that an energy drinks could an does if taken to much make you a space cadet . My buddy is not on antidepressants, but he takes ibrufrin for pain in the morning ,an drinks a massive 3 litre bottle of coke in a short time . an he is flying like a bird at work all day. He say,s it improve,s his work load an he makes more money . Pretty cool for the moment but burn out will happen. Drinking normal amounts of coffee is ok ,but if you start to feel wired you are drinking to much.