A Study of Naltrexone SR/ Bupropion SR in Overweight and Obese Subjects Who Are Nicotine-Dependent

All subjects are to complete a 4 week titration period at which time subjects will be titrated up to a maintenance level of study drug. Subjects will then take the maintenance dose of study drug for an additional 20 weeks.

During the study, subjects will receive ancillary therapy including counseling on smoking cessation, diet and exercise.