Toward Opioid-Free Analgesia: Metamizole–Ketamine versus Metamizole–Tramadol in Orthopedic Postoperative Pain Management. Journal of Carcinogenesis, [S. l.], v. 24, n. 7s, p. 747–754, 2025. DOI: 10.64149/J.Carcinog.24.7s.747-754. Disponível em: https://carcinogenesis.com/index.php/JOC/article/view/1161. Acesso em: 5 feb. 2026.