A Multicenter, Randomized, Double-Blind, Placebo-Controlled, Parallel-Group, 26-Week Trial to Measure the Efficacy and Safety of a Novel Nicotine Replacement Therapy in Smokers in a Naturalistic Environment

This trial is a multi-center, randomized, double blind, placebo-controlled parallel group study to measure the efficacy and safety of a new nicotine replacement therapy for smoking cessation in a naturalistic environment. Subjects will be randomized in a 2:1 ratio (active to placebo). It is anticipated that data from about 450 in the active treatment group at Week 12 will be required for the safety analysis. In order to obtain that number of subjects, approximately 1500 subjects will need to be enrolled into the Use phase of the study, 1000 in the active arm and 500 in the placebo arm.

Based on the directions for use on the Drug Facts label, the study will include six weeks of full study drug treatment and then six weeks of progressive tapering drug treatment (Weeks 1-12). There will be a 14-week post-use follow up period.

This trial will be conducted in three sequential phases: Enrollment (baseline), Use and Post-use Follow-up. The Enrollment Phase will be conducted in approximately 20 pharmacies in nine diverse geographical areas in the continental United States. Subjects who qualify to participate in the study will be given three units of investigational product, a subject diary for tracking investigational product use and a medical problems worksheet to assist in the collection of AE information. Subjects will also be given a small hand counter and will be encouraged to use it to help keep track of the number of doses they use each day. Subjects will also be given a card with contact information for the pharmacy and study nurses. Where needed, the subject can also speak with the study physician.

During the Use Phase, the collection of data related to efficacy will be accomplished during four return visits to the pharmacy (at weeks 2, 4, 6 and 12). Self-reported abstinence will be verified by carbon monoxide (CO) measurements obtained at each pharmacy visit. Subjects will be given a subject use diary at each follow-up and re-supply visit and completed diaries will be collected each time the subject returns to the pharmacy. Subjects can return to the pharmacy for additional supplies at any time during their participation. Empty units will be returned during these visits.

Safety data will be collected during four telephone interviews, conducted by trained nurse interviewers, at weeks 2, 4, 6 and 12. If a subject reports an adverse event during a visit (return visit or resupply visit), this information will be immediately forwarded to the nurse interviewers for follow-up. Subjects may also initiate a call to the study nurses themselves to discuss health problems. All AE information collected will be reviewed by a physician as the adverse events are collected. A standardized visual mouth examination will be conducted by trained dentists at the enrollment visit and at the Week 12 return visit.