Getting off caffeine cold turkey can be extremely unpleasant and cause caffeine withdrawal. If you’re used to drinking coffee or tea all the time, figure out what amount of caffeine you’re consuming. 1 cup of coffee/ 1 espresso = approx. 64mg caffeine, 1 cup of tea = approx. 26mg caffeine. Switch from coffee/espresso/tea to caffeine pills. Caffeine pills generally have 200mg of caffeine so you’ll need get a pill cutter and cut them in half or a quarter to get the dose right. Start with the same amount of caffeine in pill form and then over the next few weeks wean down and off them, comfortably. The caffeine pills are available at most pharmacies or on Amazon. Pills are much less likely to cause an autoimmune response than coffee and are much easier to get off of.