Abstract
Aim: To evaluate polypharmacy (PP) in patients with metastatic colorectal cancer receiving regorafenib. Methods: Patients with metastatic colorectal cancer receiving regorafenib were included and divided into two categories by their PP status: PP- (<5 regular drug use/day) and PP+ (≥5 regular drug use/day). Results: 80 patients were included. 31 (38.7%) patients had PP. The median number of drugs used was three and sevenin PP-and PP+ patients, respectively. Antiemetics (26.5%) and antacids (48.4%) were the most common drugs used by PP- and PP+ patients, respectively. In multivariate analysis, the risk of death was higher in PP+ patients (hazard ratio: 2.1; 95% CI: 1.2-3.7; p=0.005). Conclusion: PP was an independent prognostic factor for overall survival in patients with metastatic colorectal cancer receiving regorafenib.
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