Cigarette Packaging of Low Nicotine Cigarettes

After completing a 5-day baseline period of smoking their own brand, participants will be randomized to a 30-day experimental period when they will receive low nicotine content cigarettes in one of four types of packaging: gray, red, blue, or plain.

After completing a 5-day baseline period of smoking their own brand, participants will be randomized to a 30-day experimental period when they will receive their own preferred brand of cigarette (i.e., control).