Efficacy and Safety of an Electronic Nicotine Delivery Device (E-Cigarette) Without Nicotine Cartridges

• Sustained 50% reduction in the number of cigarettes smoked per day at week-12 from baseline [ Time Frame: week-12 ] [ Designated as safety issue: No ]
  50% reduction in the number of cigarettes smoked per day documented at each study visit (week-2, -4, -6, -8, -10, and -12)
  
  
• Sustained smoking abstinence at week-12 [ Time Frame: week 12 ] [ Designated as safety issue: No ]
  Sustained smoking abstinence at week-12, defined as complete abstinence from tobacco smoking (not even a puff) for the 14 days period prior to week-12 study visit; exhaled CO levels will be measured to objectively verify smoking status.
  
  

• Sustained 80% reduction in the number of cigarettes smoked per day at week-12 from baseline [ Time Frame: week-12 ] [ Designated as safety issue: No ]
  80% reduction in the number of cigarettes smoked per day documented at each study visit (week-2, -4, -6, -8, -10, and -12).
  
  
• Sustained smoking abstinence at week-24 [ Time Frame: week 24 ] [ Designated as safety issue: No ]
  Sustained smoking abstinence at week-24, defined as complete abstinence from tobacco smoking (not even a puff) for the 30 days period prior to week-24 study visit; exhaled CO levels will be measured to objectively verify smoking status.
  
  
• Sustained 50% reduction in the number of cigarettes smoked per day at week-24 from baseline [ Time Frame: week-24 ] [ Designated as safety issue: No ]
  50% reduction in the number of cigarettes smoked per day documented at each study visit (week-2, -4, -6, -8, -10, -12 and -24)
  
  
• Sustained 80% reduction in the number of cigarettes smoked per day at week-24 from baseline [ Time Frame: week-24 ] [ Designated as safety issue: No ]
  50% reduction in the number of cigarettes smoked per day documented at each study visit (week-2, -4, -6, -8, -10, -12 and -24).
  
  
• Withdrawal suppression (by MNWS) [ Time Frame: 24 weeks ] [ Designated as safety issue: No ]
  
• Cravings reduction (by VAS) [ Time Frame: 24 wks ] [ Designated as safety issue: No ]
  
• Reported adverse events rate from baseline [ Time Frame: 24 wks ] [ Designated as safety issue: Yes ]
  

The electronic cigarette (E-Cigarette) is an electronic nicotine delivery systems designed for the purpose of nicotine delivery to the respiratory system where nor tobacco nor combustion are necessary for its operation. For these reasons, it is possible that this product may be safer than cigarettes. Marketing claims also include that they can be useful smoking cessation aids. Although E-Cigarette may produce lung delivery of nicotine similar to that of tobacco cigarettes and reproduces the gesture component associated with tobacco smoking, very little is known about the effect of E-Cigarette on the smoking habits of regular tobacco smokers. Therefore, we designed a prospective observational study consisting of 8 office-based visits (a baseline visit and a 2, 4, 6, 8, 10, and 12-weeks and a final visit at 24-weeks) to monitor possible modifications in the smoking habits of a group of well characterized regular smokers experimenting the e-cigarette focusing on long-term smoking reduction/abstinence, changes in withdrawal symptoms/cravings and adverse events. Specifically, 100 smokers will be given "Categoria" electronic cigarette loaded without nicotine ("NO nicotine" cartridges) and followed up for a total of 24 weeks.</