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  • 1
    ISSN: 1432-2072
    Keywords: d-Amphetamine Sulfate ; Dopamine Antagonist ; Noradrenaline Antagonist ; Nucleus Accumbens ; Caudate Nucleus ; Locomotor Activity ; Haloperidol ; Phentolamine ; Propranolol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect of intracerebral administration of antagonists of dopamine and noradrenaline upon the locomotor stimulation induced by intraperitoneal injection of d-amphetamine sulfate in rats was investigated. Injection of low doses of the dopamine antagonist haloperidol (2.5 Μg and 5 Μg) bilaterally into the nucleus accumbens antagonized the locomotor stimulation following d-amphetamine. No significant inhibition was observed following administration of the alpha-adrenergic antagonist phentolamine or the beta-adrenergic antagonist propranolol into the nucleus accumbens. Injection of the same doses of haloperidol into the caudate nucleus did not inhibit the d-amphetamine induced locomotor activity, in contrast to the effects seen following injection into the nucleus accumbens. The results confirm the significance of dopaminergic mechanisms for the locomotor stimulant effect of d-amphetamine and indicate that the mesolimbic dopamine system plays an important role in this respect.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-739X
    Keywords: Adverse effects ; Dementia ; Drug utilization ; Nursing homes ; Pharmacoepidemiology ; Psychotropic drugs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The aim of this study was to describe the use of psychotropic drugs in a psychogeriatric nursing home, “Joachim en Anna”, in Nijmegen, the Netherlands. To this end the medical records of 890 nursing home patients with dementia, admitted between 1980 and 1989, were analysed retrospectively. Each time pattern of psychotropic drug use was registered. Drugs were coded by means of the Anatomical Therapeutic Chemical classification system. The daily dose was expressed as the ratio of the mean prescribed daily dose and the defined daily dose. Side-effects and changes in prescription patterns throughout the years patients were admitted were analysed. A total of 3,090 time patterns of exposure to psychotropics were registered. Neuroleptics, benzodiazepines, and antidepressants accounted for 58, 32, and 9% of the time patterns, respectively. For almost every drug prescription the prescribed daily dose was lower than the defined daily dose. More than 75% of these nursing home patients had at least one prescription for a psychotropic drug during institutionalization. One or more side-effects were observed in 50% of the patients who used a neuroleptic. The total number of patients receiving psychotropics did not change throughout the study. Psychotropics were prescribed for long-term use, but in a low dose. Side-effects were frequently observed while the correct individual dose was being determined.
    Type of Medium: Electronic Resource
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