Clinical Report: Addressing Tamoxifen-Associated Weight Gain: Lifestyle and Pharmacotherapy Options
Overview
Tamoxifen therapy for hormone receptor-positive breast cancer is linked to significant weight gain in a substantial proportion of women. This report discusses the prevalence, mechanisms, and management strategies for tamoxifen-associated weight gain.
Background
Breast cancer remains a leading cause of cancer-related mortality among women in the U.S., with hormone receptor-positive cases constituting the majority. While tamoxifen is effective in reducing recurrence and mortality, its association with weight gain poses additional health risks for survivors. Understanding and managing this weight gain is crucial for improving long-term outcomes in breast cancer survivors.
Data Highlights
Study
Weight Gain Prevalence
Average Weight Change
Raghavendra et al., 2018
33.7% (≥5% gain at 5 years)
N/A
Ginzac et al., 2018
56% (postmenopausal)
+1.5 kg
Uhelski et al., 2024
67% (premeno), 43% (postmeno) (≥5% gain)
N/A
Key Findings
39% to 61% of women on tamoxifen experience weight gain, influenced by menopausal status and treatment duration.
Weight gain is more pronounced in women with lower initial fat mass and those with prior chemotherapy.
Tamoxifen may disrupt appetite regulation and lipid metabolism, contributing to weight gain.
Excess adiposity in breast cancer survivors is linked to higher recurrence and mortality risks.
Current guidelines emphasize the importance of weight management in cancer survivorship care.
Clinical Implications
Healthcare providers should monitor weight changes in patients undergoing tamoxifen therapy and consider lifestyle interventions or pharmacotherapy for weight management. Comprehensive assessments, including body composition analysis, are recommended to tailor individual management strategies.
Conclusion
Addressing tamoxifen-associated weight gain is essential for optimizing the health and survivorship of women with hormone receptor-positive breast cancer. Effective management strategies can mitigate the associated risks and improve overall outcomes.
