Reactions to cigarettes as a function of nicotine and "tar"

Area of Science:

• Tobacco Science
• Behavioral Science

Background:

• Cigarette smoking is a complex behavior influenced by various components.
• Nicotine and tar are key constituents of cigarette smoke with debated roles in smoking maintenance.

Purpose of the Study:

• To investigate the distinct effects of nicotine and tar on subjective smoking experiences and behavior.
• To determine whether nicotine or tar is more critical in maintaining cigarette smoking.

Main Methods:

• Smokers evaluated commercial low-nicotine cigarettes and specially designed cigarettes varying in nicotine and tar yields.
• Subjective ratings of "strength" and "satisfaction" were collected.
• Number of cigarettes smoked and urinary nicotine excretion were measured.
• Smoking behavior was analyzed for evidence of dose titration.

Main Results:

• Low-nicotine cigarettes were rated as less "strong" and "satisfying".
• "Strength" ratings correlated with nicotine yield, independent of tar.
• Nicotine yield influenced the number of cigarettes smoked, while tar did not.
• Evidence suggested smokers titrated their nicotine intake.

Conclusions:

• Nicotine plays a significant role in maintaining cigarette smoking behavior, whereas tar does not appear to be a primary factor.
• Findings support the development of reduced-harm cigarettes with a high nicotine-to-tar ratio.