IRCT20121021011192N4 IRCT 2018-01-06 Deputy of Research, Shahid Beheshti Universty of Medical Sciences Melatonin in type 2 diabetes Comparison of the effect of oral melatonin administration with placebo on biochemical parameters associated with diabetes in diabetes mellitus Type 2 patients 2017-12-22 anticipated 88 Complete https://irct.ir/trial/27814 interventional Randomization: Randomized, Blinding: Triple blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: ُُSimple individual randomization with Microsoft Excel software, Blinding description: Participants, principle investigator, healthcare providers (Physicians, nurses) who care for participants during the trial, data collectors and outcome assessors all are blinded by providing placebo melatonin in same size, shape color, odor and package with real melatonin tablet which organized just by one responsible co-researcher has no involvement in running study. 3 diabetes. Intervention 1: Intervention group: Addition of melatonin tablet orally 6 mg/d to for 2 weeks Type 2 diabetes regimen for 2 months. Intervention 2: Control group: Addition of melatonin placebo tablet orally 6 mg/d to for 2 weeks Type 2 diabetes regimen for 2 months. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no further information.