Ständer, Sonja, Elke Weisshaar, Jennifer L Parish, Jacek C Szepietowski, Adam Reich, Neil J Korman, Enoch Bortey, and Thomas R Sciascia. “Oral Nalbuphine Extended-Release Is Effective in Severe Prurigo Nodularis–Associated Pruritus: Results From a Phase 2b/3, Double-Blind, Placebo-Controlled Study”. SKIN The Journal of Cutaneous Medicine 6, no. 6 (November 16, 2022): s103. Accessed February 6, 2023.