RT Book, Section A1 Dopp, John M. A1 Phillips, Bradley G. A2 DiPiro, Joseph T. A2 Talbert, Robert L. A2 Yee, Gary C. A2 Matzke, Gary R. A2 Wells, Barbara G. A2 Posey, L. Michael SR Print(0) ID 1167752898 T1 Sleep–Wake Disorders T2 Pharmacotherapy: A Pathophysiologic Approach, 10e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259587481 LK accesspharmacy.mhmedical.com/content.aspx?aid=1167752898 RD 2022/05/21 AB Content UpdateSeptember 16, 2019Newly Approved Medication for Narcolepsy with or without Cataplexy: The U.S. FDA approved a medication with novel mechanism of action for narcolepsy treatment. Pitolisant (Wakix), the first selective histamine 3 (H3) receptor inverse agonist, was approved in 2019 for narcolepsy.The H3 receptor inverse agonist was approved for treating excessive daytime sleepiness (EDS) in narcolepsy in adults because of its hypothesized role in increasing wake-promoting histamine. While other treatments for EDS are available, this is the first treatment with the mechanism of action involving histamine.