BZ is a potent anticholinergic deliriant or incapacitant. Small amounts (< 1 mg) cause long-lasting effects that closely resemble those of its tropane alkaloid cousins atropine and scopolamine, the active agents in datura and belladonna . This includes highly idiosyncratic effects such as the impulse to take off one's clothes or to smoke phantom cigarettes.An incapacitating dose is 7-8 ug/kg (approx. 500 ug). The onset is slow, lasting roughly 3-4 hours, during which time the ingester may alternate between fatigue and restlessness, with growing disorientation. By the fourth hour, people may enter a stuporous slumber for several hours. Upon awakening, they will be profoundly disoriented for another 48 hours or so during which they will typically experience extreme confusion, hallucinations, and delirium.BZ also has a range of physiological effects, most of which are unpleasant. These include extreme dilation of the pupil and difficulty focusing vision, which may exacerbate disorientation and hallucination. BZ also impedes heat dispersal, leading to a danger of over-heating, even in normal temperature conditions.For a thorough and detailed description of BZ's effects, see James Ketchum's Related Resources