Tramadol, Pharmacology, Side Effects, and Serotonin Syndrome: A Review. Beakley BD, Kaye AM, Kaye AD. Pain Physician. 2015 Jul-Aug;18(4):395-400. http://www.painphysicianjournal.com/current/pdf?article=MjM3OA%3D%3D&journal=89

Tramadol addict: a rare but real challenge for the anaesthesiologist. Pathak A, Kumar V, Rastogi S. Anaesthesiol Intensive Ther. 2017;49(3):242-243. doi: 10.5603/AIT.a2017.0033. https://journals.viamedica.pl/anaesthesiology_intensivetherapy/ar...

Opioidrotation in der Tumorschmerztherapie - Ein systematisches Review Opioid rotation in cancer pain treatment—a systematic review Schuster, Michael; Bayer, Oliver; Heid, Florian; Laufenberg-Feldmann, Rita Dtsch Arztebl Int 2018; 115(9):...

Das Update für Ihre Schmerztherapie! Schnell, zuverlässig, kostenlos – der neue Opioid-Rechner von Grünenthal Der Schmerzspezialist Grünenthal möchte Sie darin unterstützen, Schmerzpatienten gut zu versorgen. D...

An Expanding World of Novel Psychoactive Substances: Opioids. Zawilska JB. Front Psychiatry. 2017 Jun 30;8:110. doi: 10.3389/fpsyt.2017.00110. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5492455/

Patterns of regional variation of opioid prescribing in primary care in England: a retrospective observational study Luke Mordecai, Carl Reynolds, Liam J Donaldson, Amanda C de C Williams Br J Gen Pract 12 February 2018; bjgp18X695057. DOI: 10.3...