Pediatric Functional Constipation: Bowel Cleanout and Maintenance Therapy
Medical management of pediatric functional constipation is recommended to include fecal disimpaction when fecal impaction is present, followed by maintenance laxative therapy plus education and toilet training. [1]
Disimpaction (Bowel Cleanout) Indications
Fecal impaction is treated with a pharmacologic cleanout before starting or intensifying maintenance therapy. [1]
Disimpaction Medication Protocol
High-dose polyethylene glycol cleanout
- Polyethylene glycol (PEG) 3350 or PEG 4000 is recommended for fecal disimpaction. [1]
- PEG with or without electrolytes 1 to 1.5 g/kg/day given for 3 to 6 days is recommended as first-line treatment for children with fecal impaction. [1]
- PEG 4000 dosing for fecal disimpaction is 1 to 1.5 g/kg/day with a maximum of 6 consecutive days. [1]
Enema cleanout alternative
- An enema once per day for 3 to 6 days is recommended for children with fecal impaction if PEG is not available. [1]
Maintenance Therapy Medication Protocol
First-line maintenance
- Maintenance PEG therapy is recommended. [1]
- PEG 3350 maintenance dosing is 0.2 to 0.8 g/kg/day. [1]
- PEG is supported as more effective than lactulose, milk of magnesia, mineral oil, or placebo for maintenance therapy. [1]
Second-line options when PEG is not available or not tolerated
- Lactulose is recommended as first-line maintenance treatment if PEG is not available. [1]
- Milk of magnesia, mineral oil, and stimulant laxatives may be considered as additional or second-line treatments. [1]
Maintenance Therapy Duration and Discontinuation
Maintenance treatment should continue for at least 2 months. [1] All constipation symptoms should be resolved for at least 1 month before discontinuation of treatment. [1] Treatment should be decreased gradually. [1] For the developmental stage of toilet training, medication should only be stopped once toilet training is achieved. [1]
Behavioral and Supportive Components of Care
Education and toilet training are included components of constipation management. [1] A defecation diary is incorporated into ongoing management. [1] Reassessment and adjustment of medication are required after initiation. [1] Occasional suppository use is incorporated for selected patients during the treatment course. [1]
Common Pitfalls to Avoid
Starting maintenance laxatives without performing disimpaction when fecal impaction is present is not aligned with the recommended treatment sequence. [1] Stopping medication before symptom resolution for at least 1 month after at least 2 months of maintenance is not aligned with guideline-based discontinuation criteria. [1] Discontinuation without gradual tapering is not aligned with guideline-based stopping recommendations. [1]
Medication Dose Table (Pulled from Guideline Dosing)
PEG
- PEG 3350 maintenance: 0.2 to 0.8 g/kg/day. [1]
- PEG 4000 fecal disimpaction: 1 to 1.5 g/kg/day for up to 6 consecutive days. [1]
- PEG with or without electrolytes fecal impaction cleanout regimen: 1 to 1.5 g/kg/day for 3 to 6 days. [1]
Lactulose
- Lactulose maintenance dosing: 1 to 2 g/kg once or twice daily. [1]
Milk of magnesia (magnesium hydroxide)
- Age 2 to 5 years: 0.4 to 1.2 g/day once or divided. [1]
- Age 6 to 11 years: 1.2 to 2.4 g/day once or divided. [1]
- Age 12 to 18 years: 2.4 to 4.8 g/day once or divided. [1]
Stimulant laxatives
- Bisacodyl: 3 to 10 years 5 mg/day; >10 years 5 to 10 mg/day. [1]
- Senna: 2 to 6 years 2.5 to 5 mg once or twice/day; 6 to 12 years 7.5 to 10 mg/day; >12 years 15 to 20 mg/day. [1]
Rectal options (when used for fecal impaction protocols)
- Enema once per day for 3 to 6 days is recommended when PEG is not available. [1]
Treatment Targets and Follow-Up Outcomes
Successful cleanout is achieved by elimination of fecal impaction before maintenance therapy. [1] Clinical improvement requires resolution of all constipation symptoms before discontinuation. [1]