RT Journal Article
SR Electronic
T1 Disposition of phencyclidine in mice after smoke exposure.
JF Drug Metabolism and Disposition
JO Drug Metab Dispos
FD American Society for Pharmacology and Experimental Therapeutics
SP 680
OP 684
VO 10
IS 6
A1 A S Freeman
A1 B R Martin
YR 1982
UL http://dmd.aspetjournals.org/content/10/6/680.abstract
AB Mice were exposed to the smoke from placebo marihuana cigarettes treated with phencyclidine hydrochloride (PCP . HCl). A dose-related decrement in motor performance was observed after exposure to the smoke from cigarettes containing 10-15 mg of PCP . HCl. Tissue levels of 3H-PCP, 3H-PC (pyrolysis product), and 3H-metabolites were measured in several tissues up to 7 days after exposure to 50 mg of 3H-PCP . HCl. 3H-PCP levels were highest in liver followed by lung, brain, fat, and plasma for the first 10 min after exposure. The 3H-PCP concentration in all tissues, except fat, declined during the subsequent 50 min. Liver and lung contained the highest levels of 3H-metabolites during this hour, followed by plasma, fat, and brain. Brain levels of 3H-PCP correlated well with the magnitude and duration of behavioral effects observed (r = 0.98). 3H-PC was also well absorbed from smoke as evidenced by initial tissue levels comparable to those of 3H-PCP, but they declined more rapidly than 3H-PCP levels. Excellent correlations were obtained between 3H-PCP and 3H-PC concentrations in plasma and those in liver, lung, and brain. 3H-PCP was not detected in any tissue 3 days after smoke exposure. At 1 and 3 days, radioactivity corresponding to metabolites persisted in liver and lung, but had largely disappeared by 7 days.