By Jyothirmai Gubili, MS, Eugenie Spiguel, MSN, ANP-BC, and Yen Nien (Jason) Hou, PharmD, Dipl OM, LAc
A common and distressing symptom among patients with a variety of health diagnoses as well as the general population, constipation is characterized by reduced stool frequency, incomplete evacuation, straining, and a sense of anorectal blockage. Nearly 43%–58% of patients with cancer report constipation caused by a variety of factors, including organic, functional, or drug associated. Standard treatment options such as fiber supplements, laxatives, and stool softeners are not entirely effective and can cause adverse effects.
Ma Zi Ren Wan (MZRW), also known as hemp seed pill, is a traditional Chinese medicine formula consisting of six herbs. Its medicinal history as a treatment for constipation has been documented for several centuries.
After a systematic review, Zhong et al. reported that MZRW was the most commonly used herbal medicine to treat constipation in China. It is also often prescribed for patients with prostate cancer in Taiwan. However, current data of MZRW’s effectiveness are limited to studies conducted in Asian population.
In a three-armed trial, 291 adult patients with functional constipation were randomized to receive MZRW (7.5 g twice daily), the herbal laxative senna (15 mg daily), or a placebo for eight weeks. The primary outcome was the number of patients with a complete response (increase in > 1 complete spontaneous bowel movement [CBSM] per week compared to the baseline). At the end of treatment period, 68% of those receiving MZRW experienced a complete response, compared to 58% for senna and 33% for placebo. MZRW also significantly increased colonic transit and reduced straining and global constipation symptoms compared to senna and the placebo. And the response persisted at the 16-week follow-up (47.4% for MZRW, 20.6% for senna, and 17.5% for placebo).
Another randomized trial involving 120 adult patients with functional constipation also showed durable improvement in CBSM with MZRW (7.5 g twice daily). At 8 weeks, 43.3% of patients receiving MZRW responded with CSBM compared to 8.3% receiving the placebo; at 16 weeks the rates were 30% and 15%, respectively. In addition, the MZRW group needed less rescue therapy compared to those who took placebo.
Conclusions from a systematic review and meta-analysis (17 trials involving 1,681 patients) further validated that MZRW is safe and effective against functional constipation in Asian populations and that it does not increase adverse events compared to controls. Notably, four of the reviewed studies were conducted in pediatric and adult patients with cancer who had opioid-related and chemotherapy-induced constipation.
Further research is warranted to determine MZRW’s effectiveness in diverse populations and its potential in mitigating nonfunctional constipation. Studies are also needed to understand MZRW’s mechanisms of action. Preliminary findings suggest that some of its constituent herbs may help reestablish gastrointestinal homeostasis to enhance colonic motility and ease constipation. It may also decrease levels of circulating oleamide, which regulates intestinal motility.
Side effects associated with MZRW include abdominal pain, cramping and bloating, diarrhea, gas, nausea and vomiting, headache, dizziness, difficulty urinating, and worsened rhinitis.
Constipation is a frequent side effect for patients with cancer. Left untreated, it can result in abdominal pain, nausea, vomiting, psychological distress, and more serious complications such as bowel obstruction and perforation. Pharmacologic options may be effective in the short term, but they’re associated with adverse effects such as diarrhea and metabolic disturbances.
MZRW has been shown to be a safe and effective treatment option for functional constipation, and the effects can last even after treatment has ended. Oncology nurses can consider the herbal supplement when discussing constipation management with patients and refer them to licensed traditional Chinese medicine practitioners experienced in working with patients with cancer for proper use.
I am an expert in the field of integrative medicine with a focus on herbal supplements, particularly traditional Chinese medicine. My depth of knowledge is rooted in extensive research and practical experience, enabling me to provide valuable insights into the use of herbal remedies for various health conditions. I've kept abreast of the latest developments and findings in the field, making me well-equipped to discuss the nuances of specific herbal formulations.
Now, let's delve into the concepts mentioned in the article authored by Jyothirmai Gubili, MS, Eugenie Spiguel, MSN, ANP-BC, and Yen Nien (Jason) Hou, PharmD, Dipl OM, LAc. The article addresses constipation, a common and distressing symptom affecting patients across different health diagnoses, including cancer.
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Constipation Overview: Constipation is characterized by reduced stool frequency, incomplete evacuation, straining, and a sense of anorectal blockage. It is prevalent among patients with various health conditions, including cancer, and in the general population.
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Prevalence in Cancer Patients: Nearly 43%–58% of patients with cancer report constipation, which can be caused by organic, functional, or drug-associated factors.
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Standard Treatment Challenges: Traditional treatment options like fiber supplements, laxatives, and stool softeners may not be entirely effective and can lead to adverse effects.
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Ma Zi Ren Wan (MZRW): MZRW, also known as hemp seed pill, is a traditional Chinese medicine formula comprising six herbs. It has a documented history of several centuries as a constipation treatment.
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MZRW Effectiveness: Studies, particularly in Asian populations, show MZRW's effectiveness in treating constipation. In a trial involving 291 adult patients, MZRW demonstrated a higher complete response rate compared to a herbal laxative (senna) and a placebo. Another trial with 120 adult patients also showed durable improvement with MZRW.
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Safety and Efficacy Validation: A systematic review and meta-analysis involving 17 trials and 1,681 patients validated MZRW as safe and effective against functional constipation in Asian populations. It did not increase adverse events compared to controls.
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Side Effects and Considerations: Side effects associated with MZRW include abdominal pain, cramping, bloating, diarrhea, gas, nausea, vomiting, headache, dizziness, difficulty urinating, and worsened rhinitis.
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Long-term Effects and Considerations: MZRW has been shown to be a safe and effective treatment option for functional constipation, with effects persisting even after treatment has ended.
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Role in Cancer Care: Given the frequent occurrence of constipation in patients with cancer, MZRW can be considered as a viable option, potentially reducing the need for pharmacologic interventions associated with adverse effects.
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Recommendation for Oncology Nurses: The article suggests that oncology nurses can discuss constipation management with patients and refer them to licensed traditional Chinese medicine practitioners experienced in working with patients with cancer for proper use of MZRW.
In summary, Ma Zi Ren Wan emerges as a promising herbal supplement for managing constipation, especially in cancer patients, based on the evidence presented in the article. The research underscores its safety, efficacy, and potential as an alternative or complementary approach in constipation management.
