Nicotine the wonder drug

Just when I'm starting to seriously considering quitting (I need to save every penny possible), out comes some new research about the wonders of nicotine. However the part that had me worried was the following extract:

"There will be a variety of nicotine-based drugs coming out," agrees Ed Levin, a nicotine researcher at Duke University, who's done groundbreaking research on improving mental function in schizophrenia, Alzheimer's patients and people with ADHA. Levin believes the drugs are something to look forward to.

"There will be great progress when the nicotine sister drugs come to market," he says. "About half the cigarettes in this country are bought by people with psychiatric problems -- high percentages of people with depression and schizophrenia smoke, for example.

Which made me think - what if I'm in the 50% highlighted above with some deep-seated problems? Let's not think about it, I'm sure I'll have more than enough excuses as to why I cannot/shouldn't/wouldn't quit when the time arrives. Almost there, the last (???) remaining carton is getting close to being empty.