Effects of Relighting on Smoke Toxicant Deliveries and Subjective Smoking Measures
Characterize effects of relighting on smoke toxicant deliveries and subjective smoking measures. This will be a within-subject comparison in a single experimental group of 30 smokers who report engaging in relighting behaviors. We will assess smoking intensity for relit and non-relit (i.e., smoked continuously without relighting) cigarettes in the natural environment and will conduct in-clinic measurements of smoking topography and subjective responses for relit and non-relit cigarettes. Information on relighting patterns and smoking topography collected from each participant will be used to compare machine-measured smoke yields of key harmful constituents when their usual cigarettes are smoked with and without relighting. Hypothesis: Relit cigarettes will produce higher levels of toxicants than non-relit cigarettes.
- EligibilityCriteria: Inclusion Criteria:  Smoking at least 10 cigarettes/day for at least 1 year (confirmed by CO > 8 ppm or NicAlert test of 6) Engaging in relighting for at least half of their CPD No smoking quit attempts in the past month nor intentions to quit in the next month Stable medical or psychiatric conditions with systolic blood pressure < 160, diastolic blood pressure < 100 and heart rate < 105 bpm  Exclusion Criteria:  Participant with current or recent alcohol or drug abuse problems, use of substances of abuse (other than marijuana due to high prevalence of co-use) within the past month Currently trying or planning to quit smoking in the next month Planning to become pregnant, pregnant or breastfeeding. Pregnancy exclusion will be confirmed through a urine test. - HealthyVolunteers: Accepts Healthy Volunteers - Gender: All - MinimumAge: 21 Years - StdAgeList: Adult, Older Adult