Because of safety concerns, inadequate efficacy data, or both, cessation drugs are not recommended for the following: Pregnant smokers Light smokers (< 10 cigarettes / day) Adolescents (< age 18), except possibly regular heavy smokers Users of smokeless tobacco E-cigarettes and smoking cessation E-cigarettes are another form of nicotine delivery, and some devices are believed to deliver nicotine to the brain as quickly as combusted cigarettes.