Hey guys, I'm really relieved to hear that after quitting, others are also experiencing crippling fatigue. I quit smoking a week ago, after traveling to Europe, in Norway where the greens are frowned upon. I also have chronic Lyme disease, so I was unsure whether it was my illness or weed withdrawal that was causing my fatigue. As others have pointed out, the wiring of the brain changes drastically after heavy use. While I'm not depressed about a specific thing, I feel like I am mourning a death of someone close to me. I'm sure that adding Lyme disease (the reason I smoked chronically in the first place) has made the situation worse, but the fatigue with the depression have made me the negative Nancy and a total drag for everyone else on the trip. Obviously weed is nowhere near the intensity of the withdrawal of an alcoholic, but here are some things that have helped me: Drink ungodly amounts of water, purposely sweat, try to move around a lot, when you interact with people act like they are the president (not trump) or someone of high status so that it brings out the best in you. Finally, and very weirdly, before you go to bed, pretend that you just smoked. Squint your eyes and breath deeply and try to replicate how you feel after you smoke. This may sound stupid, but it totally helps me fall asleep and cope with the depression. Good luck to everyone!