RT Journal Article SR Electronic T1 Less dangerous smoking JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 17 OP 19 DO 10.1136/dtb.16.5.17 VO 16 IS 5 YR 1978 UL http://dtb.bmj.com/content/16/5/17.abstract AB Cigarette smoking is probably the country’s largest avoidable hazard to health.1 Three years ago we discussed ways of helping people to stop smoking.2 Every doctor, however, has some patients who will not or cannot give it up: these can be encouraged to smoke less dangerously.