Stimulants in general are very counterproductive to what's causing the fatigue.
The adrenals have to deal with the stimulants, which makes the little glands work even harder. Almost everyone here has had to give up coffee even.
You might want to have some of your levels checked, such as magnesium, Vit. D and B12, if you are deficient in any of them, supplements can be prescribed, or taken OTC.
Or you may even need to have your cortisol and/or thyroid tested. There are certain particular tests that are better at detection than others.
Post Edited (julymorning) : 1/27/2017 2:55:41 PM (GMT-7)