title: Electronic cigarettes and cannabis: an exploratory study.
abstract: OBJECTIVE
  To describe cannabis 'vaping' with electronic cigarettes (e-cigarettes) or electronic vaporizers (e-vaporizers).
  
  
  METHODS
  Internet survey in 2013-2014. Participants were 11 people who 'vaped' cannabis with e-cigarettes and 44 people who vaped cannabis with e-vaporizers, enrolled online.
  
  
  RESULTS
  Most participants were men (78%). They had used e-cigarettes for 6 days and e-vaporizers for 50 days on average to vape cannabis. Current users of e-cigarettes vaped cannabis on 2 days/week versus 6 days/week for users of e-vaporizers. In these devices, they mostly inserted cannabis buds and oil rather than hashish or wax/butane honey oil. Dual users, who both smoked and vaped cannabis, currently smoked 5 joints/week compared to 14 joints/week before they started to vape cannabis (p = 0.004). Half the participants (45%) reported that vaping cannabis helped them stop or reduce their total cannabis use, 37% that it had no impact on their cannabis use, and 6% that it increased it. Vaping cannabis was perceived as healthier and more discrete than smoking it (less odor). Disadvantages included dry mouth and fewer positive cannabis effects.
  
  
  CONCLUSIONS
  Cannabis vaping via e-cigarettes or e-vaporizers is an infrequent behavior that was previously almost undocumented. E-cigarettes do not appear to be a very appealing way to use cannabis.
authors.affiliation: Institute of Global Health, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
authors.forename: Jean-Francois
authors.initials: JF
authors.lastname: Etter
mesh_terms: D000328:Adult; D001294:Attitude to Health; D002188:Cannabis; D066300:Electronic Nicotine Delivery Systems / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D008385:Marijuana Smoking / Q000453:epidemiology* / Q000523:psychology; D008875:Middle Aged; D009330:Nebulizers and Vaporizers / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D055815:Young Adult