Drugs online research references
Psychopharmacology (Berl). 1990;102(2):183-90.
Self-administration in baboons and the discriminative stimulus effects in rats of bupropion, nomifensine, diclofensine and imipramine.
Lamb RJ, Griffiths RR.
Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences, Baltimore, MD 21225.
The behavioral effects of the antidepressants nomifensine, diclofensine, bupropion, and imipramine were examined using a cocaine substitution drug self-administration procedure in baboons and a cocaine drug discrimination procedure in rats. Intravenous self-administration of the antidepressants was examined in baboons under conditions in which baseline responding was maintained by intravenous injections of cocaine HCl (0.32 mg/kg/injection). Drug was available under a fixed-ratio 80-response or 160-response schedule of intravenous injection. Each drug injection was followed by a 3-h time-out allowing a maximum of eight injections per day. The antidepressants or their vehicles were substituted for cocaine for a period of 15 days, followed by a return to the cocaine baseline. Nomifensine, diclofensine and bupropion all maintained self-administration behavior at levels above those maintained by their respective vehicles. Some doses of nomifensine, diclofensine, and bupropion maintained levels of behavior similar to those maintained under baseline cocaine conditions. High doses of imipramine maintained levels of behavior above those maintained by its vehicle, but the amount of behavior maintained under these conditions was extremely small. In a second experiment rats were trained to discriminate 32 mumol/kg cocaine (IP 10 min presession) from no drug in a two-lever food reinforced drug discrimination procedure in which responding on one lever was reinforced following ten consecutive responses when the session was preceded by cocaine administration, while responding on the other lever was similarly reinforced in the absence of cocaine pretreatment. Cocaine, nomifensine, diclofensine, and bupropion all dose-dependently occasioned cocaine-appropriate responding. Imipramine did not occasion cocaine-appropriate responding over a range of behaviorally active doses.
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BACKGROUND: Taft Hartley Funds provide group health care coverage for 10 million union workers as well as their dependents in industries such as construction and transportation. The adult smoking rate in these populations is estimated at approximately 40%, therefore, these funds include 9 million adult smokers. The absence of evidence demonstrating the effectiveness of smoking cessation programs has kept Taft Hartley Funds from investing in smoking cessation benefits. METHODS: A prototype for Taft Hartley Funds consistent with the Federal Clinical Guidelines for Smoking Cessation was designed and implemented in a pilot demonstration in the Carpenters Health and Security Trust of Western Washington. Participants chose a 1-call or more intensive 5-call smoking cessation counseling plan provided by the Group Health Cooperative's Free and Clear program. Medications were limited to the nicotine patch, nicotine gum, and Bupropion. Assessment of outcomes was performed by Free and Clear through a telephone survey 12 months following the enrollment date. RESULTS: Nine hundred thirty-five smokers participated in the program. This pilot evaluation covers 325 participants with at least 12 months since enrollment; 75% were male, the average age was 41.4 and 63% had smoked at least one pack per day for more than 20 years. Sixty-one percent selected 5-Call Counseling; 39% 1-Call. Seventy-five percent also used smoking cessation medications: gum, 4%; patch, 32%; Bupropion 21.5%; patch plus Bupropion, 15.7%. The point-prevalence-quit rates were: overall, 27.5%; 1-Call, 25.5%; and 5-Call, 28.9%. The cost of the program was $1025.28 per smoker who quit, or $11.78 per full-time equivalent employee covered by the Fund per year. The compounded savings in reduced lifetime tobacco-related medical costs for the participants who quit are estimated to be 15 times the cost of the program, yielding an annual return on investment of 27.6%. CONCLUSIONS: These results strongly suggest that smoking cessation programs can be effective even in such hard-to-reach populations as itinerant building trades workers, provided that the program is designed to their needs and environment. Based on these findings, health plans need to consider whether they are at risk of violating their fiduciary duties if they fail to offer smoking cessation benefits. Copyright 2002 Wiley-Liss, Inc.
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J Clin Psychiatry. 2002 Oct;63(10):936-41.
Risk factors for falls during treatment of late-life depression.
Joo JH, Lenze EJ, Mulsant BH, Begley AE, Weber EM, Stack JA, Mazumdar S, Reynolds CF 3rd, Pollock BG.
Intervention Research Center for Late-Life Mood Disorders, Department of Psychiatry, University of Pittsburgh School of Medicine, PA, USA.
BACKGROUND: Prior studies have found that antidepressant medications are associated with an increased risk of falling in elderly persons. However, little is known about the prevention of falls during treatment for depression in elderly persons. This study evaluated the time course and potential risk factors for falls in a treatment protocol for late-life depression to identify specific at-risk periods and risk factors for falls in this population. METHOD: One hundred four subjects aged 69 years and over were treated in a protocolized manner using paroxetine and interpersonal psychotherapy. Those who did not respond received augmentation therapy with bupropion, nortriptyline, or lithium. Subjects were assessed at baseline and weekly during treatment; demographic and clinical characteristics of those who experienced a fall during treatment were compared with those who did not fall. Cox proportional hazards models were used to define risk factors for falls in univariate and multivariate models. RESULTS: During a mean of 21 weeks of treatment, 40 subjects (38%) fell. About half (53%) of the subjects fell during the first 6 weeks of treatment. In the multivariate model, memory impairment and orthostatic changes in blood pressure during treatment were risk factors for falling. Additionally, augmentation with bupropion appeared to be a risk factor for falls in univariate analysis, but this result is preliminary due to the small number of subjects who took bupropion. CONCLUSION: Increased monitoring for falls is warranted during the acute treatment of late-life depression. When treating such patients, clinicians should be especially watchful of those with memory impairments or those who develop orthostatic blood pressure changes; orthostatic blood pressure should be measured throughout acute treatment. Additionally, augmenting paroxetine with bupropion may also increase the risk of falls, and this medication combination should be used with caution in elderly patients.
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