IRCT20210719051943N1 IRCT 2022-01-22 Ghoum University of Medical Sciences adding erythromycin and metoclopramide to the diet of colonoscopy preparation Evaluation of adding erythromycin and metoclopramide to the standard diet of colonoscopy in colonoscopy preparation 2022-02-20 anticipated 350 Complete https://irct.ir/trial/58094 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: A stochastic sequence will be generated by the block analytics method using a limited block randomization method. Random allocation encryption will be performed by the analyzer itself using the method of using opaque sealed envelopes sealed with random sequence (SNOSE). Participants will attend the study over time and on a random. interventionism and control groups will be assigned based on accident (coin toss). 2 Colonoscopic preparation. Intervention 1: Control group: High volume peg 4 liters. Intervention 2: Intervention group1: Peg high volume + 3 tablets 10 mg metoclopramide. Intervention 3: Intervention group 2: Peg high volume +3 mg tablets 400 erythromycin+ 3 tablets 10 mg metoclopramide. Intervention 4: Intervention group3: Peg high volume +3 tablets 20 metoclopramide + 3 erythromycin 400 mg tablets. Intervention 5: Intervention group 4: Peg low volume + 2 mg 20 metoclopramide tablets. 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 The results of the study should be reviewed.