Fig. 6.
Self-administration of benzodiazepine agonists by rhesus monkeys trained under a progressive-ratio schedule of i.v. drug delivery. (a) Dose-response functions for the mean number of injections per session (±SEM) maintained by zolpidem and L-838,417 (n = 5 monkeys). *, P < 0.05 compared to saline availability, Dunnett's tests. ⋄, Zolpidem; □, L-838,417. (b) Maximum BP irrespective of dose (BPmax). Data are mean + SEM for n = 5 monkeys. Lines represent reliable differences from L-838,417, Bonferroni tests.