The principles of addiction medicine / Duncan Raistrick -- Substitute prescribing : opioid-specific prescribing / Kim Wolff -- Substitute prescribing : buprenorphine maintenance prescribing / Nick Lintzeris -- Treatment of withdrawal symptoms / Joanna Banbery -- Replacement prescribing / Kim Wolff -- Management of comorbidity / Duncan Raistrick -- Toxicologic issues / Kim Wolff -- Medical aspects of drug abuse / Shoshana Zevin and Neal L. Benowitz -- Emergency management of drug abuse / Brett A. Roth, Neal L. Benowitz, and Kent R. Olson.