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Eight heroin-dependent individuals, maintained on divided daily doses of oral morphine, participated in a 2.5-week inpatient study comparing the effects of intranasal (IN) (placebo, 12.5, 25, 50, 100 mg) and intravenous (IV) (placebo, 6.25, 12.5, 25, 50 mg) heroin. Each morning, participants received $20 and a sample dose of heroin, and each afternoon they(More)
Attenuation of hypothalamo-pituitary-adrenal (HPA) function in laboratory rodents has been found to reduce the reinforcing effects of cocaine. To examine whether attenuation of HPA function reduces the effects of cocaine in humans, one female and seven male 'crack' cocaine abusers were pretreated with three doses of ketoconazole (0, 600, 1200 mg), an(More)
Buprenorphine is a partial mu-opioid agonist and kappa-opioid antagonist currently under development as a maintenance medication for heroin dependence. Because of concerns about illicit diversion of buprenorphine, a combination tablet containing buprenorphine and naloxone has been developed. The present study evaluated the reinforcing effects of(More)
Surgical or pharmacological ablation of the hypothalamic-pituitary-adrenal (HPA) axis reduces the discriminative stimulus and reinforcing effects of cocaine in laboratory rodents. We have recently reported that attenuation of cocaine-induced increases in cortisol does not modulate the subjective effects of smoked cocaine in humans. To examine whether(More)
RATIONALE Studies have shown that buprenorphine, a partial mu opioid agonist, effectively reduces heroin taking. While previous research with buprenorphine utilized a liquid formulation, a tablet formulation is proposed for clinical use. However, because recent research suggests that the liquid and tablet differ in bio-availability, it is unclear what dose(More)
A procedure was developed for the determination of memantine in plasma using liquid chromatography with fluorescence detection. Following a liquid-liquid extraction from 1 ml of plasma containing the internal standard amantadine, the extract was derivatized at room temperature with dansyl chloride, and the highly fluorescent derivatives were chromatographed(More)
CONTEXT Rapid opioid detoxification with opioid antagonist induction using general anesthesia has emerged as an expensive, potentially dangerous, unproven approach to treat opioid dependence. OBJECTIVE To determine how anesthesia-assisted detoxification with rapid antagonist induction for heroin dependence compared with 2 alternative detoxification and(More)
RATIONALE Although buprenorphine is effective in treating opioid dependence, optimal maintenance doses of buprenorphine or the buprenorphine/naloxone combination have not yet been established. OBJECTIVE The present study was designed to evaluate the effects of buprenorphine/naloxone maintenance (2/0.5, 8/2, 32/8 mg sublingual) on the reinforcing and(More)
RATIONALE Data in laboratory animals suggest that D1 receptor agonists may have potential utility for the treatment of cocaine abuse. OBJECTIVE The effects of ABT-431, a selective agonist at the dopamine D1 receptor, on the reinforcing, cardiovascular and subjective effects of cocaine were investigated in humans. METHOD Nine experienced cocaine smokers(More)
Five morphine-maintained individuals participated in an inpatient study evaluating the effects of a monetary alternative ($10, $20, $40) on intranasal (i.n.) heroin (placebo, 12.5, 25, 50, 100 mg) self-administration, using a procedure in which subjects chose between money and heroin. Each money amount was tested in combination with each heroin dose.(More)