RT Journal Article SR Electronic T1 SOME PHARMACOLOGICAL EFFECTS OF TWO TETRAHYDROCANNABINOLS JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 25 OP 33 VO 135 IS 1 A1 R. Dagirmanjian A1 E. S. Boyd YR 1962 UL http://jpet.aspetjournals.org/content/135/1/25.abstract AB In anesthetized cats, time dimethyl heptyl pyran derivative, the most potent tetrahydrocannabinol tested, lowered blood pressure, depressed respiration, relaxed the gut, and depressed two polysynaptic reflexes (the flexion and linguomandibular). The methyl octyl pyran derivative produced effects in general similar to those of DMHP, but it was shorter acting and showed stimulatomy action on time flexion reflex. In mice, barbiturate sleeping times were prolonged significantly by DMHP and by MOP. The increased activity induced by amphetamine was also prolonged by DMHP and by MOP. The 7-day LD50's DPH mnd for MOP given intravenously were 27 mg/kg and 5.0 mg/kg, respectively. The site of action of the effects on blood pressure and reflexes was narrowed to the area between the mesencephalon and the the level of the first cervical vertebra, possibly in the reticular formation of the medulla.