is caffeine a opioid?
No, opiates and opioids are derived from poppies, and are narcotic pain relievers and exist in a class of depressants. Caffeine, on the other hand, is found in many plants, e.g., coffee, guarana, different types of tea, etc. It is a natural stimulant and does not, in fact, relieve pain. So, in effect, it is fairly opposite to opiates.