I have stopped smoking going on 4 days. I'm taking Nicotine Lozenges, after reading a lot of people comments on here and reading online I called my doctor and asked him. He said he had several people on nicotine patches or gum that had surgery done and we're FINE. He said that nicotine was not the problem he said it's the oxyegen level more than anything thats the problem. He told me I could stay on the gum or lozenges or the patch just to quit smoking. He said Smokers just DO NOT HEAL right. and he attributed it to the oxyegen levels or lack of when you smoke and all the other chemicals. I am quitting smoking, I just don't want to have my fusion done then have to quit and be going through a da-mn nic fit at the same time. Also my doctor is one of the best back surgeons in GA. Hes done tons of these surgeries and has had lots of success at them. I would ask your surgeon before reading on-line. I would rather have doctors orders.