“…In this regard, it is well to remember that several other drugs have been reported to induce or increase REM sleep: 5-hydroxytryptophan (Wyatt, 1972), reserpine (Hartmann and Cravens, 1973), LSD (Torda, 1968), the alpha-adrenergic receptor blockers phenoxybenzamine (Hartmann and Zwilling, 1976) and thymoxamine (Oswald et al, 1975), alpha-methylpara-tyrosine (Wyatt, 1972), and nicotinamide (Robinson et al, 1977). The ultimate goal, therefore, is understanding the integration of diverse neuronal systems, cholinergic as well as others, in the regulation of behavior and the states of consciousness.…”