Serum magnesium concentration in children with functional constipation treated with magnesium oxide

• Published in: World journal of gastroenterology : WJG Vol. 17; no. 6; pp. 779 - 783
• Main Author: Tatsuki, Maiko
• Format: Journal Article
• Language: English
• Published: United States Baishideng Publishing Group Co., Limited 14.02.2011
• Subjects: Adolescent; Adult; Brief; Child; Child, Preschool; Constipation - blood; Constipation - drug therapy; Female; Humans; Infant; Laxatives - therapeutic use; Magnesium - blood; Magnesium Oxide - therapeutic use; Male; 中位数; 便秘; 实验室检查; 氧化镁; 治疗剂量; 浓度; 血清; 记者采访; Children; Constipation; Magnesium oxide; Hypermagnesemia; Renal dysfunction
• ISSN: 1007-9327; 2219-2840; 2219-2840
• DOI: 10.3748/wjg.v17.i6.779

AIM：To determine whether hypermagnesemia recently reported in adult patients possibly develops in children with functional constipation taking daily magnesium oxide.METHODS：We enrolled 120 patients （57 male and 63 female） aged 1-14 years old （median：4.7 years） with functional constipation from 13 hospitals and two private clinics.All patients fulfilled the Rome Ⅲ criteria for functional constipation and were treated with daily oral magnesium oxide for at least 1 mo.The median treatment dose was 600 （500-800） mg/d.Patients were assessed by an interview and laboratory examination to determine possible hypermagnesemia.Serum magnesium concentration was also measured in sex-and agematched control subjects （n=38）.RESULTS：In the constipation group,serum magnesium concentration [2.4 （2.3-2.5） mg/dL,median and interquartile range] was significantly greater than that of the control group [2.2 （2.0-2.2） mg/dL] （P 0.001）.The highest value was 3.2 mg/dL.Renal magnesium clearance was significantly increased in the constipation group.Serum magnesium concentration in the constipation group decreased significantly with age （P 0.01）.There was no significant correlation between the serum level of magnesium and the duration of treatment with magnesium oxide or the daily dose.None of the patients had side effects associated with hypermagnesemia.CONCLUSION：Serum magnesium concentration increased significantly,but not critically,after daily treatment with magnesium oxide in constipated children with normal renal function.