Varenicline Tartrate With Telephone-Based Counseling and/or Internet-Based Counseling in Helping Adults Stop Smoking

RATIONALE: Varenicline tartrate may help people quit smoking by decreasing the symptoms of nicotine withdrawal. It is not yet known whether varenicline tartrate is more effective in helping people stop smoking when given together with a telephone-based counseling program, and Internet-based counseling program, or both programs. PURPOSE: This randomized clinical trial is studying how well giving varenicline tartrate together with a telephone-based counseling program and/or an Internet-based counseling program works in helping adults stop smoking.