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  • 1
    ISSN: 1432-2072
    Schlagwort(e): Key words Olanzapine ; Dopamine D2 receptor ; 123I IBZM ; SPECT ; Atypical antipsychotic drug
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We investigated the degree of striatal dopamine-2 (D2) receptor occupancy in six schizophrenic patients receiving clinically effective antipsychotic treatment with olanzapine 10–25 mg/day in comparison to patients treated with clozapine 300–600 mg/day (n = 6) or haloperidol 5–20 mg/day (n = 10). 123I Iodobenzamide (IBZM) and single photon emission computerized tomography (SPECT) were used for the visualization of striatal D2 receptors. For the quantification of striatal D2 receptor occupancy, striatal IBZM binding in patients treated with antipsychotics was compared to that in untreated healthy controls (n = 8) reported earlier. Olanzapine led to a mean striatal D2 receptor occupancy rate of 75% (range 63–85). Haloperidol-treated patients showed dose-dependently (Pearson r = 0.64; P 〈 0.05) a significantly higher (P 〈 0.05) mean occupancy rate of 84% (range 67–94). During clozapine treatment, the mean D2 receptor occupancy of 33% (range 〈 20–49) was significantly lower than with olanzapine (P 〈 0.005). The higher striatal D2 receptor occupancy of haloperidol was correlated with the incidence and severity of extrapyramidal motor side-effects (EPS). No clinical relevant EPS occurred during treatment with olanzapine or clozapine. There was no correlation between the degree of striatal D2 receptor occupancy and clinical improvement.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-2072
    Schlagwort(e): Benzodiazepine ; Use ; Abuse ; Dependence ; Intake-habits
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A sample of 171 benzodiazepine (bzd) users was investigated in the pharmacy where the patients filled in their prescriptions. Of the sample, 29.8% were males and 70.2% were females. About 60% of the patients had their current prescription from a general practitioner, the rest from different specialists. 70.8% stated to take bzds on more than 3 days of the week. The mean duration of intake of the entire sample was 4.5 years. The most frequent reasons for bzd intake were sleep disturbance followed by nervousness and somatic diseases. A total of 74.9% of the patients turned out to be well informed about the potential dependence hazards of bzd long term intake, but less than half of them had been informed by the prescribing physician. In a second step it could be demonstrated by means of multiple stepwise logistic regression analysis that certain characteristic parameters differentiate long-term users and persons with signs of potential abuse and dependence from other bzd users.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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