RT Journal Article SR Electronic T1 Clinical update: melatonin and sleep disorders JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 381 OP 383 DO 10.7861/clinmedicine.8-4-381 VO 8 IS 4 A1 Josephine Arendt A1 Eus JW Van Someren A1 Richard Appleton A1 Debra J Skene A1 Torbjorn Akerstedt YR 2008 UL http://www.rcpjournals.org/content/8/4/381.abstract AB The hormone melatonin is increasingly used for the treatment of certain sleep disorders, particularly those related to disturbed biological rhythms. This article summarises current knowledge of its mechanism of action and identifies situations where there is good evidence for its efficacy. The authors provide advice, based on their own experience and consistent published data, concerning the dose range of melatonin to be used and the critically important question of the timing of treatment. Anecdotal evidence for the use of melatonin needs to be replaced by data from well-controlled, preferably multi-centre, randomised clinical trials.