I stopped two years ago cold turkey. Wish I had many years earlier. Forget about lung, throat, lip, tong, and heart disease, among all the others, except COPD. I'm reading COPD is even worse than dying from lung cancer. Those with COPD suffer to the very end of life. One part I recall, other than trying to get another breath of air, is you will have to be placed on oxygen. But they have to pull the oxygen off you because soon the lungs and throat and other passage ways began to dry out. As soon as they pull it, you freak out thinking you will suffocate without oxygen. I over dramatized it but no XXXT, it's isn't going to ever reverse once you have COPD.