How To Remove Nicotine Out Of The System?

I am testing for a double-lung transplant. I quit smoking in 2005 but the anxiety has been high. My doctor suggested Xanax and I don't want to take it as I am also a recovered alcoholic and get addicted to things easily. I thought a Nicotine lozenge was the least abusive thing I could do to myself but the transplant team was very upset about that. They could turn me down if I can't have a clean blood test. Is there anything I can do to get the Nicotine out of system quickly?