a 12 month scrip when she's never taken it before? That's heavy. I've been on it for a year and its a very strong drug. Normally they'll write a scrip for a month and call you back in two weeks to see if you're handling it OK.
Reading the prescribing info shows that it is not prescribed for smoking cessation. It doesn't act on dopamine like Wellbutrin aka Zyban. Of course, this doctor may be using it off label, but it doesn't sound like an effective treatment.