_____________________________________________________________________________________________________ *Corresponding author: E-mail: kiavash13@yahoo.com; Journal of Pharmaceutical Research International 28(4): 1-8, 2019; Article no.JPRI.50209 ISSN: 2456-9119 (Past name: British Journal of Pharmaceutical Research, Past ISSN: 2231-2919, NLM ID: 101631759) Comparison of Polyethylene Glycol Powder and Polyethylene Glycol 40% Syrup in Treatment of Chronic Idiopathic Constipation in Pediatrics Karam-Ali Kasiri 1 , Kiavash Fekri 1* , Hojjat Rouhi-Boroujeni 2 , Masoud Lotfizadeh 3 , Nabiallah Asadpour 1 , Hamid Mohammadi 4 , Niloufar Kasiri 4 , Fatemeh Deris 5 , Sadra Ansaripour 6 and Mostafa Madmoli 7 1 Department of Pediatrics, Shahrekord University of Medical Sciences, Shahrekord, Iran. 2 Medical Plants Research Center, Shahrekord University of Medical Science, Shahrekord, Iran. 3 Department of Public Health, School of Health, Shahrekord University of Medical Sciences, Shahrekord, Iran. 4 Shahrekord University of Medical Sciences, Shahrekord, Iran. 5 Department of Biostatistics and Epidemiology, Faculty of Health, Shahrekord University of Medical Sciences, Shahrekord, Iran. 6 Student’s Research Committee, Shahrekord University of Medical Sciences, Shahrekord, Iran. 7 Gerash University of Medical Sciences, Gerash, Iran. Authors’ contributions This work was carried out in collaboration among all authors. Authors KAK, KF, NK, FD, SA and MM designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Authors HRB and HM managed the analyses of the study. Author ML managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/JPRI/2019/v28i430211 Editor(s): (1) Dr. Rafik Karaman, Professor, Department of Bioorganic Chemistry, College of Pharmacy, Al-Quds University, Jerusalem, Palestine. Reviewers: (1) P. K. Lakshmi, G. Pulla Reddy College of Pharmacy, India. (2) P. K. Hota, Kaloji Narayana Rao University of Health Sciences, India. (3) N. L. Dashputre, Savitribai Phule Pune University, India. Complete Peer review History: http://www.sdiarticle3.com/review-history/50209 Received 29 April 2019 Accepted 06 July 2019 Published 22 July 2019 ABSTRACT Introduction: Constipation is one of the most common gastrointestinal complaints in children that can lead to many complications. The aim of this study was to compare the efficacy of polyethylene glycol powder and polyethylene glycol 40% syrup to treat constipation. Original Research Article