Comment on

• The effect of pregabalin on preoperative anxiety and sedation levels: a dose-ranging study.

  White PF, Tufanogullari B, Taylor J, Klein K. White PF, et al. Anesth Analg. 2009 Apr;108(4):1140-5. doi: 10.1213/ane.0b013e31818d40ce. Anesth Analg. 2009. PMID: 19299776 Clinical Trial.
• Melatonin provides anxiolysis, enhances analgesia, decreases intraocular pressure, and promotes better operating conditions during cataract surgery under topical anesthesia.

  Ismail SA, Mowafi HA. Ismail SA, et al. Anesth Analg. 2009 Apr;108(4):1146-51. doi: 10.1213/ane.0b013e3181907ebe. Anesth Analg. 2009. PMID: 19299777 Clinical Trial.
• The effect of melatonin on sleep quality after laparoscopic cholecystectomy: a randomized, placebo-controlled trial.

  Gögenur I, Kücükakin B, Bisgaard T, Kristiansen V, Hjortsø NC, Skene DJ, Rosenberg J. Gögenur I, et al. Anesth Analg. 2009 Apr;108(4):1152-6. doi: 10.1213/ane.0b013e31819a6cf0. Anesth Analg. 2009. PMID: 19299778 Clinical Trial.