My anecdote is that coffee definitely has something besides caffeine that affects the central nervous system. I tend to quit drinking coffee few times a year, a

My anecdote is that coffee definitely has something besides caffeine that affects the central nervous system. I tend to quit drinking coffee few times a year, and I replace it with heavy tea drinking. No amount of tea makes the withdrawal symptoms go away. After a week, the physical effects (headache, tiredness) thankfully fade, but nothing seems to help with the depression that comes in a month. Due to that, I haven't really gone beyond a month of not using coffee -- it just doesn't seem worth it. I would find the people who think that coffee is not a narcotic amusing if they weren't so fucking serious. I really wish there was more scientific data on this. Seems like all studies just focus on the caffeine effects.