title: The Efficacy of Oral Melatonin in Improving Sleep in Cancer Patients with Insomnia: A Randomized Double-Blind Placebo-Controlled Study.
abstract: BACKGROUND
  The natural hormone melatonin has sleep inducing properties. Insomnia in cancer patients is common. So far, melatonin has been seldom tried for the improvement of sleep in patients with malignancies. Keeping this in mind, we planned and conducted a double-blind study to test the efficacy of melatonin in promoting sleep in patients with malignancies suffering from insomnia.
  
  
  OBJECTIVE
  To assess the hypnotic efficacy of oral melatonin in cancer patients with insomnia.
  
  
  METHODS
  After Ethical Committee approval, 50 patients (age range 20-65 years) from our pain clinic NIVARANE who met the Diagnostic and Statistical Manual of Mental Disorders 4(th) edition criteria for primary insomnia were randomized to receive melatonin 3 mg or placebo at 7 pm orally every day for 14 days from our pharmacist. After 1, 7, 14 days, the patients were reviewed with the Athens insomnia scale oral questionnaire to document the subjective sleep quality. The patients and we, the investigators were blinded to the study drug.
  
  
  RESULTS
  There were 2 drop outs (one from each group) as they failed to complete visit on day 14. Significant differences in favor of melatonin treatment were found in clinically relevant improvements in insomnia (46.53%; P = 0.00001 vs. 11.30%; P = 0.1026) There was improvement in sleep from 1 to 7 days (19.91%; P = 0.00001 vs. 0.98%; P = 0.2563). More significant improvements were seen between 7 and 14 days (33.24%; P = 0.00001 vs. 10.42%; P = 0.1469).
  
  
  CONCLUSIONS
  We conclude that daily intake of oral melatonin 2 h before bedtime improves sleep induction and quality in cancer patients with insomnia.
authors: Department of Anaesthesiology, Karnataka Institute of Medical Sciences, Hubli, Karnataka, India.
authors: Madhuri S
authors: MS
authors: Kurdi
authors: Department of Anaesthesiology, Karnataka Institute of Medical Sciences, Hubli, Karnataka, India.
authors: Sindhu Priya
authors: SP
authors: Muthukalai
keywords: Malignancies; Melatonin; Oral administration; Sleep; Sleep disorders