Therapeutic Drug Monitoring of Psychotropic Drugs: What We Know, What We Don't, and the Controversies

*Department of Clinical Pharmacology, St. Olav University Hospital, Trondheim, Norway; and †Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway. Correspondence: Olav Spigset, MD, PhD, Department of Clinical Pharmacology, St. Olav University Hospital, 7006 Trondheim, Norway (e-mail: [email protected]). The author declares no conflict of interest.