Every eighteen months (more or less) I have to taper off from coffee, especially if I get up to 32 oz a day, at which point I'm a buzzy, angsty basket case. Every two days, I drop my intake to a half to a quarter (so like 8oz on day one, and then 4 oz on day three and then 2 oz on day five).
If I go cold turkey, I get headaches. This way, I just nap a lot.
During this period, all my fucks go away. Gone. I have absolute zero fucks to give about anything. Mostly I just sit in a corner and social media scroll as if doing any of that will stimulate me somehow. It won't.
This is the closest I get to turning off my emotions, but man, it shuts down everything.