Not so fun fact: people with ADHD have a lot more trouble than "normal people" (you know what I mean, English isn't my first language so I don't know how to say in other way) dealing with cravings withdrawals and quitting stuff that stimulates them (alcohol, tobbaco, marijuana, other drugs.) I myself smoke, vape, drink and (sometimes) smoke marijuana (in my country it's not illegal to have it if it is for personal use, but if youre caught with it you need to give it to the police since it's illegal to sell) and I find it very hard to not do it. But one think I do when I find myself completely addicted to it, is go at least 1 month without it. First 5 days are tough, sometimes I gain or lose lots of weight, mood swings and lots of cravings but eventually I get to the point where I go out and start using only at nights out. And then, some months later, I have to detox again. It's tiring but I know it's for the best and that it's somehow a tolerance break so it hits better next time. If you're really ready to stop, most people will recommend nicotine gum, but I tried myself and they taste worse than menthol gun which I hate do I don't really recommend. Maybe some nicotine patches. Also, if you're a heavy smoker, talk to a doctor, because it will cause a massive impact on you and it can lead to serious problems. Or try to stop slowly, I don't recommend because I know it won't work for me. Some people recommend running a kilometer every time you crave a cigarette, but cravings last up to 20 mins (on average people, I assume on ADHD it is more and also experienced it). One thing that for sure will help is not hang out with people that will smoke in front of you. Just tell them your quitting and if they smoke if don't of you, they clearly don't give a shit. I have a friend that is quitting and I absolutely never smoke in front of her. Good luck on your journey, and if you need any help just reply here! I know how hard it is, but I know that you can do it!!