• Philippa Helen Hawley and Jai Jun Byeon.
• Department of Palliative Care, BC Cancer Agency, Vancouver, British Columbia, Canada. pippahawley@shaw.ca
• J Palliat Med. 2008 May 1; 11 (4): 575-81.

BackgroundConstipation is a common and distressing condition in patients with cancer, especially those taking opioid analgesics. Many institutions prevent and treat constipation with titrated laxatives, which is known as a bowel protocol. An effective and well-tolerated bowel protocol is a very important component of cancer care, and there is little evidence on which to base selection of the most appropriate agents. This study compares a protocol of the stimulant laxative sennosides alone with a protocol of sennosides plus the stool softener docusate, in hospitalized patients at an oncology center. The docusate-containing protocol had an initial docusate-only step for patients not taking opioids, and four to six 100-mg capsules of docusate sodium in addition to the sennosides for the rest of the protocol.MethodsThirty patients received the sennosides-only (S) protocol and 30 the sennosides plus docusate (DS) protocol. The efficacy and adverse effects of the protocols were monitored for 5-12 days. The two protocols were used sequentially, creating two cohorts, one on each protocol. Eighty percent of patients were taking oral opioids and 72% were admitted for symptom control/supportive care.ResultsOver a total of 488 days of observation it was found that the S protocol produced more bowel movements than the DS protocol, and in the symptom control/supportive care patients this difference was statistically significant (p < 0.05). In the S group admitted for symptom control/supportive care 62.5% had a bowel movement more than 50% of days, as compared with 32% in those receiving the DS protocol. Fifty-seven percent of the DS group required additional interventions (lactulose, suppositories or enemas) compared to 40% in the S group. Cramps were reported equally by 3 (10%) patients in each group. Eight patients (27%) experienced diarrhea in the S group compared to 4 (13%) in the DS group.ConclusionsThe addition of the initial docusate-only step and adding docusate 400-600 mg/d to the sennosides did not reduce bowel cramps, and was less effective in inducing laxation than the sennosides-only protocol. Further research into the appropriate use of docusate and into the details of bowel protocol design are required.

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