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Both cocaine withdrawal symptoms, measured by an instrument called the Cocaine Selective Severity Assessment (CSSA), and urine toxicology results obtained at the start of treatment have been shown to predict treatment outcome in outpatient cocaine dependence treatment. This study further evaluates the predictive validity of the CSSA and urine toxicology results, alone and in combination. Subjects included 76 cocaine-dependent individuals who participated in 7-week, outpatient, pilot medication trials for cocaine dependence. Predictor variables included CSSA scores and results from a urine toxicology screen obtained on the first day of medication treatment. Successful outcome was defined as 3 continuous weeks of self-reported abstinence from cocaine confirmed by urine toxicology screens. Predictive validity was assessed by logistic regression analysis. Both the urine toxicology screen and the CSSA scores were significant predictors of 3 weeks of continuous abstinence from cocaine, and the inclusion of both variables significantly improved the predictive validity of either variable alone. Urine toxicology results and CSSA scores obtained at treatment entry are useful predictors of outcome in outpatient cocaine dependence treatment.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11817766&dopt=Abstract
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ucsd.edu
BACKGROUND: Fenfluramine was withdrawn from the U.S. market in 1997 because of its association with cardiac-valve abnormalities in adults. The combination of fenfluramine and phentermine had been widely used to promote weight loss, and many women were inadvertently exposed during the first trimester of pregnancy. The possible effect on the developing fetus has not been studied. METHODS: Controlled prospective cohort study comparing 98 women who had taken phentermine/fenfluramine to 233 women who had not, all of whom contacted the California Teratogen Information Service during pregnancy. RESULTS: The proportion of liveborn infants with major structural anomalies was similar in the two groups (3.6% vs. 1.0%, relative risk (RR) 3.59; 95% confidence interval (CI) 0.61, 21.10), as was the proportion of infants with >or=3 minor anomalies (11.7% vs. 7.6%, RR 1.53; 95% CI 0.61, 3.82). Furthermore, no pattern of malformation was identified. There were no significant differences between the groups in spontaneous pregnancy loss (6.1% vs. 8.2%, P = 0.65) or premature delivery (8.6% vs. 7.7%, P = 0.95). Birth weight and head circumference were significantly increased in the exposed group; however, these differences were not associated with anorexiant use itself. The rate of gestational diabetes was significantly increased in pregnant women who took phentermine/fenfluramine during the first trimester of pregnancy. CONCLUSIONS: Although it is not possible from this study to rule out weak to moderate associations, the lack of an increased risk of spontaneous pregnancy loss, and major or minor anomalies in the offspring of women who took phentermine/fenfluramine at the recommended daily dose during the first trimester of pregnancy is reassuring. Copyright 2002 Wiley-Liss, Inc.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11877776&dopt=Abstract
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Biochem Pharmacol. 2002 Mar 1;63(5):865-9.
Phentermine inhibition of recombinant human liver monoamine oxidases A and B.
Nandigama RK, Newton-Vinson P, Edmondson DE.
Department of Biochemistry, Emory University School of Medicine, Rollins Research Building, 1510 Clifton Road, Atlanta, GA 30322-3050, USA.
Recent studies with rat tissue preparations have suggested that the anorectic drug phentermine inhibits serotonin degradation by inhibition of monoamine oxidase (MAO) A with a K(I) value of 85-88 microM, a potency suggested to be similar to that of other reversible MAO inhibitors (Ulus et al., Biochem Pharmacol 2000;59:1611-21). Since there are known differences between rats and humans in substrate and inhibitor specificities of MAOs, the interactions of phentermine with recombinant human purified preparations of MAO A and MAO B were determined. Human MAO A was competitively inhibited by phentermine with a K(I) value of 498+/-60 microM, a value approximately 6-fold weaker than that observed for the rat enzyme. Phentermine was also observed to be a competitive inhibitor of recombinant human liver MAO B with a K(I) value of 375+/-42 microM, a value similar to that observed with the rat enzyme (310-416 microM). In contrast to the behavior with rat tissue preparations, no slow time-dependent behavior was observed for phentermine inhibition of purified soluble human MAO preparations. Difference absorption spectral studies showed similar perturbations of the covalent FAD moieties of both human MAO A and MAO B, which suggests a similar mode of binding in both enzymes. These data suggest that phentermine inhibition of human MAO A (or of MAO B) is too weak to be of pharmacological relevance.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11911838&dopt=Abstract
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