Changes after publication
A correction has been made to the wording of recommendation 18.104.22.168 to be clear that it is the hydrocarbons in cigarette smoke that cause interactions with other drugs, rather than nicotine. The corrected recommendation reads:
Offer people with psychosis or schizophrenia who smoke help to stop smoking, even if previous attempts have been unsuccessful. Be aware of the potential significant impact of reducing cigarette smoking on the metabolism of other drugs, particularly clozapine and olanzapine.
February 2014: minor maintenance