I know that cigarettes have saved my life. During all the years that I went undiagnosed, the fifteen years I went misdiagnosed, smoking was all I had. I have quit 4 times for a total of 5 years over the last 30 years, and each time ended up in a HORRIBLE suicidal depression. Smoking will cause you health problems and possiblly shorten your life, but nowhere near as short as my Grandmother who committed suicide at 50. Each of us should make our own treatment decisions with our Healthcare Professionals. As far as meth, I never robbed or shot anyone because I smoked too many cigarettes. In the recovery community they say a person's last addiction is the hardest to overcome.