AUTHOR=Xin Liang , Zhu Haoxiang , Niu Suping , Han Xie , Pang Hongxian , Li Jiangfan , Hu Ye , Wang Xuhong , Li Lujin , Fang Yi TITLE=Pharmacodynamic characteristics and influencing factors of tapentadol for chronic pain relief under dose titration JOURNAL=Frontiers in Pain Research VOLUME=5 YEAR=2025 URL=https://www.frontiersin.org/journals/pain-research/articles/10.3389/fpain.2024.1474529 DOI=10.3389/fpain.2024.1474529 ISSN=2673-561X