Cost-Effective Management of Opioid-Induced Constipation in Hospice Patients

Introduction to Cost-Effective Strategies

The National Comprehensive Cancer Network recommends starting with senna (2 tablets twice daily) as the most cost-effective first-line treatment for opioid-induced constipation in hospice patients, as it is inexpensive, effective, and does not require the addition of docusate 1
The American College of Physicians suggests initiating a stimulant laxative prophylactically when beginning opioid therapy to prevent constipation rather than waiting for it to develop 2

Senna 2 tablets twice daily is the preferred cost-effective option for prophylactic treatment of opioid-induced constipation 3, 2
Increased fluid intake is encouraged when appropriate to help prevent constipation 3, 1
Physical activity should be promoted within the patient's limitations to help prevent constipation 2

The National Comprehensive Cancer Network recommends assessing for fecal impaction through physical examination before initiating treatment 2
Bowel obstruction should be ruled out before escalating laxative therapy 1, 2
Senna alone (without docusate) is equally effective and more cost-efficient than combination products for the treatment of opioid-induced constipation 3
Bisacodyl 10-15 mg daily is an alternative stimulant laxative with similar efficacy and low cost 3, 2
Polyethylene glycol (PEG) 17g in 8 oz water once or twice daily is an osmotic laxative with an excellent safety profile, though slightly more expensive than stimulants 2
The goal of treatment is to achieve one non-forced bowel movement every 1-2 days 3, 1

The American College of Physicians suggests increasing bisacodyl to 10-15 mg two to three times daily before adding other agents 3, 2
Alternative osmotic laxatives such as lactulose, magnesium hydroxide, or magnesium citrate may be added or used as an alternative 3, 1
Caution should be exercised when using magnesium-based laxatives in patients with renal impairment due to the risk of hypermagnesemia 2
Opioid rotation to fentanyl or methadone may be considered to reduce constipating effects 1

Glycerin suppository is recommended as the first-line rectal intervention for fecal impaction due to its low cost and effectiveness 2
Bisacodyl suppository 10 mg rectally once or twice daily may be used as an alternative 2
Manual disimpaction with premedication (analgesic ± anxiolytic) may be necessary if suppositories fail 2
Enemas (sodium phosphate, saline, or tap water) should be used sparingly due to electrolyte concerns 1

Methylnaltrexone and similar agents should be reserved for laxative-refractory cases only due to their high cost 3, 1
The National Comprehensive Cancer Network recommends methylnaltrexone for constipation clearly related to opioid therapy that has not responded to adequate trials of stimulant and osmotic laxatives 3, 1
The dose of methylnaltrexone is 0.15 mg/kg subcutaneously every other day (maximum once daily) 3, 2
Methylnaltrexone is contraindicated in bowel obstruction or postoperative ileus 3