Sarbu, MD, Adrian, Florin Radulescu, MD, Sybil Robertson, BScN, and Sylvie Bouchard, MD, PhD. “Onset of Analgesic Effect and Plasma Levels of Controlled-Release Tramadol (Tramadol Contramid Once-a-Day) 200-Mg Tablets in Patients With Acute Low Back Pain”. Journal of Opioid Management 4, no. 5 (January 30, 2018): 285–292. Accessed May 3, 2024. https://wmpllc.org/ojs/index.php/jom/article/view/996.