Ethics of tobacco harm reduction from a liberal perspective.

Mixed evidence on the possible harms, benefits and usage patterns of electronic nicotine delivery systems (ENDS, or 'e-cigarettes'), has led to vigorous and ongoing debates on the issue. The ethical trade-off often represented is that, though smokers should be permitted access to ENDS as a less harmful alternative to smoking, this comes at the expense of non-smokers and children who may experiment with ENDS, become addicted to them, or experience health issues from long-term exposure to passive ENDS vapour. Lacking from many debates is a balanced analysis based on sound ethical reasoning, so this paper aims to examine the issue from a liberal perspective. More specifically, focus is on how ENDS policy can help to promote freedom in a broader sense, with 'freedom' considered as originating from having options and the necessary information and ability to autonomously choose between these options. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/