Briefly, this will be a two-part pharmacokinetic study, each part involving 12 participants. In Part 1, 4 volunteer smokers (both male, and female) each will each abstain from all tobacco/nicotine products for 16 hours before attending the Penn State Clinical Research Center for the measurement of the blood nicotine pharmacokinetic response to a randomly allocated dose of either (a) 0mg, (b) 2mg or (c) 4mg oral nicotine film. A trained nurse will implant an intravenous indwelling catheter in each participant, through which they will provide a baseline blood sample after 16 hours of abstinence, confirmed by an exhaled carbon-monoxide < 6 ppm, and then will place a nicotine film in their mouth and have blood drawn every 10 minutes for the next 60 minutes, and then every 30 minutes for the next 2 hours plus one blood draw one minute after the film dissolves (11 blood draws in all over 3 hours after using the nicotine film). Subjective measures of (a) nicotine withdrawal and craving and (b) potential nicotine effects, including symptoms of nicotine intoxication, will be recorded every 30 minutes, as will blood pressure and heart rate. The investigators expect to find peak blood nicotine concentrations of around 3-4 ng/ml and 5-6 ng/ml from each of the two active doses of nicotine film, with the peak occurring approximately 30 minutes after film administration, and the level having dropped by at least half by 2 hours later. These peak blood nicotine levels are all within the range that a smoker might obtain after smoking a single cigarette. Upon completion of all blood draws, a trained nurse will remove the catheter and treat the puncture wound. The participant will receive $60 for this visit.