Cochrane is an international not-for-profit and independent organisation, dedicated to providing up-to-date, accurate information about the effects of healthcare readily available worldwide. The main purpose of The Cochrane Collaboration is to develop systematic reviews of the strongest evidence available about healthcare interventions. Consumers and health practitioners can then work together to make the best possible decisions about health care. The reviews are published electronically within The Cochrane Library and are freely accessible in shortened versions

Systematic reviews of the effects of healthcare interventions are available in The Cochrane Library

Among other topics, reviews are produced for the topic tobacco, drugs and alcohol