Open-label comparison of standard 12-week regimen of varenicline with standard 10-week regimen of transdermal nicotine patch for smoking cessation.

Inclusion Criteria:

• Subjects must have smoked an average of at least 15 cigarettes per day during the past year and over the month prior to the screening visit, with no period of abstinence greater than 3 months in the past year.

Exclusion Criteria:

• Subjects with clinically significant cardiovascular disease in the past 6 months.