ZAMAN, Z. A.; KUMAR, D. Evaluation of analgesic effect of tapentadol, a central novel analgesic versus tramadol, a widely used opioid analgesic in treatment of low back pain: a randomized controlled trial. International Journal of Basic & Clinical Pharmacology, [S. l.], v. 2, n. 4, p. 392–396, 2017. Disponível em: https://www.ijbcp.com/index.php/ijbcp/article/view/1287. Acesso em: 24 oct. 2025.