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Mi Li, Donald E McMillan
The experiments showed that sequential drug discriminations can be learned and retained under a fixed-interval (FI) schedule for more than 18 months without additional training under a complex three-choice procedure. Pigeons were trained to discriminate among 5 mg/kg pentobarbital, 2 mg/kg D-amphetamine, and saline. After responding stabilized, dose-response curves were determined for other drugs. Subsequently, pentobarbital was replaced with 5 mg/kg morphine as a training drug, and D-amphetamine was replaced with 30 mg/kg caffeine...
August 22, 2003: European Journal of Pharmacology
T Z Bosy, K A Cole
There has been a recent and significant increase in the use and availability of hemp seed oil products. These products are being marketed as a healthy source of essential omega fatty acids when taken orally. Although the health aspects of these oils is open to debate, the probability that oils derived from the hemp seed will contain delta9-tetrahyrdocannabinol (THC) is noteworthy. Recent additions to the literature cite a number of studies illustrating that the ingestion of these products results in urinary levels of the THC metabolite, delta9-tetrahyrdocannabinol carboxylic acid (THCA), well above the administrative cutoff (50 ng/mL) used during random drug screens...
October 2000: Journal of Analytical Toxicology
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