Contingency Management for Smoking Cessation in Homeless Smokers

All participants who are medically eligible to take Bupropion will receive this study medication one week prior to their smoking quit date.

All participants will receive two forms of nicotine replacement therapy - nicotine patches and a rescue method (either gum or lozenge).

All participants will be asked to provide home carbon monoxide monitoring with equipment that is loaned to them. When participants provide readings that are low enough to suggest abstinence from smoking, they are provided monetary reinforcement (i.e., money).