Discovery medicine
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Electronic cigarettes (ECs) are being increasingly used as an attractive long-term alternative nicotine source to conventional tobacco cigarettes. This substitution is likely to improve health in regular EC users, and more and more respiratory patients using or intending to use ECs will be seeking professional medical advice. ⋯ Evidence-based advice about ECs is provided here with the goal of improving counseling between physicians and their respiratory patients using or intending to use ECs. Regular EC use is unlikely to raise significant health concerns and can lead to health improvement in the respiratory patient who makes the switch from tobacco smoking.