Takemura M, Niki K, Okamoto Y, et al. Tapentadol in Cancer Patients with Neuropathic Pain: A Comparison of Methadone, Oxycodone, Fentanyl, and Hydromorphone. Biol Pharm Bull. 2021;44(9):1286-1293. doi:10.1248/bpb.b21-00212