J Headache Pain. 2016 Dec;17(1):107.Risk of medication overuse headache across classes of treatments for acute migraine.Thorlund K1,2, Sun-Edelstein C3, Druyts E4,5, Kanters S4,6, Ebrahim S7, Bhambri R8, Ramos E8, Mills EJ7,4, Lanteri-Minet M9,10, Tepper S11. AbstractBACKGROUND:The most commonly prescribed medications used