outer
n.— «Then there are what many refer to as “outers.” Prescription painkillers such as Oxycontin, Vicodin, Percocet and Codeine, as well as the illicit drug LSD (acid) are drugs taken for their hallucinogenic effects.» —“Up, Down and Out” by Naomi Goldin in Cornell University Cornell Daily Sun (Ithaca, N.Y.) Apr. 4, 2006. (source: Double-Tongued Dictionary)