PDF) Are 'dual users' who smoke and use e cigarettes interested in using varenicline to stop smoking altogether, and can they benefit from it? A cohort study of UK vapers Quit Smoking: Vaping Is Twice As Effective As Nicotine Patches PsyBlog E cigarettes and health here's what the evidence actually says Vox Users of e cigarettes had increased odds of peptic ulcer disease compared to those who have never used them, a cross sectional study found. http: ms.spr.ly 6184tEgZ4 E Cigarettes A 'Major Public Health Concern': US Surgeon General