Management of Constipation After Failed Paraffin Wax Treatment

Assessment and Next Line Treatment

The American Society of Clinical Oncology recommends evaluating for fecal impaction through digital rectal examination before proceeding with next-line treatments 1
Liquid paraffin has potential disadvantages including minimal efficacy and safety issues such as aspiration risk and perianal burning, according to the European Society of Gastrointestinal Endoscopy 3
The American College of Gastroenterology advises against continued use of liquid paraffin, especially in bed-bound patients or those with swallowing disorders due to risk of aspiration pneumonia 1, 4

The European Society for Medical Oncology recommends polyethylene glycol (PEG) 17g/day dissolved in 4-8 oz of beverage as a next step, producing bowel movement typically within 1-3 days with an excellent safety profile 1, 2
The National Comprehensive Cancer Network suggests lactulose as an alternative, but it may cause bloating and takes 2-3 days for effect 2
Magnesium salts can be used with caution in patients with normal renal function, according to the American Gastroenterological Association 1, 5
Bisacodyl 10-15mg 2-3 times daily can stimulate colonic motility, particularly useful when osmotic agents alone are insufficient, as recommended by the National Comprehensive Cancer Network 6
Senna taken in the evening can produce morning bowel movement, according to the European Society for Medical Oncology 2

Glycerin suppositories can act as a rectal stimulant and can be used if oral treatments fail, as suggested by the European Society of Gastrointestinal Endoscopy 3, 6
Bisacodyl suppositories twice daily may be effective, according to the European Society for Medical Oncology and the National Comprehensive Cancer Network 2, 6
Isotonic saline enemas are preferred, especially in older adults, as recommended by the American Society of Clinical Oncology and the American Geriatrics Society 1, 4
Phosphate enemas should be used with caution due to potential electrolyte disturbances, according to the American Society of Clinical Oncology 1

For fecal impaction, digital fragmentation and extraction of stool, followed by maintenance bowel regimen, is recommended by the American Society of Clinical Oncology and the National Comprehensive Cancer Network 1, 6
Manual disimpaction may be required under anesthesia in severe cases, as suggested by the European Society of Gastrointestinal Endoscopy 3
For opioid-induced constipation, methylnaltrexone (0.15mg/kg every other day) can be considered, according to the National Comprehensive Cancer Network 6
Peripherally acting mu-opioid receptor antagonists (PAMORAs) may be valuable in unresolved opioid-induced constipation, as recommended by the American Society of Clinical Oncology 1

The goal is to achieve one non-forced bowel movement every 1-2 days, as suggested by the National Comprehensive Cancer Network 6
Monitoring for adverse effects including abdominal cramping, electrolyte disturbances, and dehydration is crucial, according to the American Society of Clinical Oncology 1
If constipation persists despite these measures, consideration for referral for specialized testing (colonic transit studies, anorectal manometry) is recommended by the American Gastroenterological Association 5