Clinical, laboratory and epidemiological studies on tobacco cessation, on marijuana cessation, natural history of smoking cessation and addiction potential of electronic cigarettes. I have two NIH grants to study:

• what daily events prompt cigarette smokers to decide to quit
• what methods daily marijuana users employ when they try to quit and how helpful are they
• whether stopping smoking makes smokers anhedonic; i.e. they enjoy pleasures less
• whether continuing medication after a smoker relapses helps them re-establish abstinence
• whether reducing smoking increases or decreases motivation to quit smoking