Electronic Cigarettes or Nicotine Inhaler for Smoking Cessation

Inclusion Criteria: * 18-60 year old * Meet DSM-IV criteria for nicotine dependence * Seeking treatment for smoking cessation * Smoking at least 15 cigarettes per day * Capable of giving informed consent and complying with study procedures Exclusion Criteria: * Lifetime history of DSM-IV diagnosis of schizophrenia, schizoaffective disorder, and bipolar disorder or current diagnosis of major depressive disorder * Current DSM-IV criteria for any other psychiatric disorder that may, according to the investigator's judgment, require either pharmacological or non- pharmacological intervention over the course of the study * Currently receiving any treatment for nicotine dependence, including nicotine replacement therapy * Pregnancy, lactation, or failure to use adequate contraception methods in women who are currently having sex with men * Unstable medical condition, such as uncontrolled hypertension, angina, and oropharyngeal conditions which may make participation hazardous * Current DSM-IV diagnosis of substance dependence, other than nicotine * Use of cannabis or alcohol on more than 20 days in the past 30 days * Risk for suicide