The Effect of Electronic Cigarette Use on Smoking Behaviors Among Smokers Receiving Outpatient Psychiatric Treatment

Inclusion Criteria: * 21 years of age or older * English-speaking, * current daily smokers (i.e., at least 5 cigarettes/day) * have been daily smokers at least for 6 months * attended a minimum of 2 treatment visits in the past 12 months at Montefiore Behavioral Health Center * have at least one psychiatric disorder (other than substance use disorders), * willing to try switching to use e-cigarettes (provided by the research team) exclusively for a total of 8 weeks, * those who are not yet ready to quit smoking, * for women of childbearing age, willingness to use contraception during the study. Exclusion Criteria: * acute psychiatric symptomatology which precludes study participation including current active suicidal ideation * current diagnosis of dementia or cognitive impairment sufficient to impair provision of informed consent or study participation * patient's inability to provide consent for study participation due to his/her inability to demonstrate an understanding of study procedures as contained in the statement of informed consent, after no more than two explanations * current clinical diagnosis of intellectual development disorder * current regular use of other tobacco products or combustible marijuana * current (non-nicotine) substance use disorder and current substance use (in the past month) * current effort to quit smoking or current use of pharmacotherapy (in the past month) to quit smoking, * pregnant, breastfeeding, or planning to become pregnant within 6 months, current unstable cardiovascular disease, * current unstable pulmonary disease (i.e., an ER visit or hospitalization due to pulmonary issues in the past 6 month or current use of oxygen therapy), * patient does not have a stable home address where the research team could reliably reach patient * household members are currently participating or have participated in this research study