Green’s Dictionary of Slang

(drugs) dexedrine, thus attrib.

1951–52		Kerouac Visions of Cody (1973) 106: Just took dexy.
1965		L. Bruce How to Talk Dirty 46: Here, take one of these Dexies.
1978		H. Selby Jr Requiem for a Dream (1987) 62: We’ll drop some dexies.
1981		J. Wambaugh Glitter Dome (1982) 132: The carpeted lobby was littered with fallen rainbows, dexies, bennies [...] even some dust.
1997		E. Little Another Day in Paradise 32: Truckloads of ups [...] everything from bennies and dexies to liquid meth.
2000		N. Griffiths Grits 86: Cut with crushed up dexies, Col says.
2017		D. Winslow The Force [ebook] He uses the whiskey to wash down a couple of Dexies.
2021		J. Ellroy Widespread Panic 51: I popped two of Jack’s delectable dexies.
2021		J. Ellroy Widespread Panic 79: I gargled Old Crow.It rerouted my dexie surge.