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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 29 (1973), S. 21-32 
    ISSN: 1432-2072
    Keywords: Schizophrenia ; Sleeplessness ; Arousal ; Haloperidol ; Anti-Parkinsonism Drugs ; Trihexyphenidyl ; Benztropine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Ten acute and seven chronic schizophrenics were longitudinally investigated in two separate double-blind studies. In both studies, after a ‘washout and settling in’ period of two or more weeks, the patients were placed on placebo for about a month and then on individualized dosages of haloperidol for four months. During the haloperidol periods, the acute patients received two three-week courses of benztropine and the chronic patients, a single two-week course of trihexyphenidyl. The anti-Parkinsonism drugs were given non-blind. Nine times every night, the patients were rated for sleeplessness, and once every week they were rated for psychopathology. The results indicated that marked, predominantly early night sleeplessness was present in the patients studied. The acute subjects were more sleepless than the chronics but the pattern of sleeplessness was similar. The degree of sleeplessness seemed related to total psychopathology, hallucinations and thought disorder. No relationship was found with affective symptoms. Haloperidol reduced sleeplessness promptly and had the effect of normalizing sleep in these patients. Concurrently used anti-Parkinsonism medication seemed to have the opposite effect in chronic patients. These data did not support the notion that haloperidol was a “stimulating” neuroleptic, and the general distinction made between “activating” and “sedative” neuroleptics was questioned. It was suggested that the “stimulating” effect noticed with some neuroleptics may be attributable to the anti-Parkinsonism drugs often used with them.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 47 (1976), S. 175-182 
    ISSN: 1432-2072
    Keywords: Critical flicker frequency (CFF) ; Flicker ; Fusion frequency ; Psychotropic drugs ; Perception
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This literature review presents summary methodological and statistical data on 33 studies in which critical flicker frequency (CFF) thresholds were used to evaluate the effects of acute oral doses of single psychotropic drugs in normal human subjects. In all, 96 drug-dose-study combinations are represented. CFF was found to be altered to a statistically significant degree (P〈0.05) in 51 (65%) of the 79 instances in which inferential statistical methods were used to evaluate the results. As expected, stimulants increased CFF while hypnotics decreased it. There is also a discussion of important methodological considerations in the design of psychopharmacological studies employing CFF. While many studies have shown CFF to be sensitive to the effects of psychotropic drugs, there have not always been adequate controls for extraneous factors (especially, set and suggestion, changes in pupillary diameter, and the presence of other commonly used drugs). Finally, consideration is given to the attempts to increase the sensitivity of the CFF test to drug effects.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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