Pemulis scores the DMZ (p. 170)
DMZ resembling chemically some miscegenation of a lysergic with a muscimoloid, but significantly different from LSD-25 in that its effects are less visual and spatially-cerebral and more like temporally-cerebral and almost ontological, with some sort of manipulated-phenylkylamine-like speediness whereby the ingester perceives his relation to the ordinary flow of time as radically (and euphorically, is where the muscimole-affective resemblance shows its head) altered.
Context
Pemulis driving the tow truck back up to Enfield with the incredibly potent DMZ packed in his yachting cap's lining, while the narration digests his MED.COM monograph-survey: the book's ultimate drug is defined not by what it makes you see but by what it does to time — "temporally-cerebral and almost ontological." Given the standing reader-theory that DMZ explains the Year-of-Glad Hal of scene 001, this sentence is the theme's loaded gun: a substance whose whole action is on one's relation to the ordinary flow of time. ("manipulated-phenylkylamine-like" is as the text has it.)