Lorazepam and Diazepam in Anxious Outpatients

Rickels, Karl; Case, Warren G.; Chung, Hack R.; Morris, Rebecca J.; Pereira-Ogan, J A; Rosenfeld, Howard Μ.; Segal, Allen T.

doi:10.1159/000468217

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…Jokinen et al (1984) found that a daily dose of I-2 mg flupentixol proved comparable with diazepam 5-10 mg daily, but their spectra of actions were somewhat different. Rickels et al (1976) used 3 mg lorazepam daily and concluded, after evaluation of the results, that this dose may be too high for mildly anxious patients. This conclusion is in agreement with our present data on the actions and concentrations measured after a single oral dose of 2.5 mg lorazepam.…”

Section: Discussionmentioning

confidence: 99%

Objective and subjective assessments of the effects of flupentixol and benzodiazepines on human psychomotor performance

Mattila

Aranko

1988

Psychopharmacology

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The aim of this double-blind crossover trial was to compare the objective and subjective effects of flupentixol and lorazepam on human performance, and to reveal possible interactions between flupentixol and diazepam. Twelve healthy students received at 1-week intervals oral single doses of flupentixol 1 mg, flupentixol 2 mg, lorazepam 2.5 mg, placebo, and diazepam 15 mg alone and with flupentixol 1 mg. After the baseline measurements, the drugs were given in capsule form, and the tests were repeated 1.5, 3 and 4.5 h later. Diazepam was given at 1.5 h, to time its peak effect to coincide with that of lorazepam. Drug effects were measured objectively (two tracking tests, digit substitution, letter cancellation, flicker fusion, Maddox wing, tapping, memory) and subjectively (visual analogue scales, questionnaire). Blood samples were taken after each test time. Flupentixol 1 mg did not differ from placebo objectively or subjectively. Flupentixol 2 mg proved nearly inert objectively and on visual analogue scales. Lorazepam impaired objectively measured test performance, the clearest effects occurring at 3 and 4.5 h. It also impaired subjectively assessed performance. Diazepam impaired objective performance less than lorazepam, its effects peaking at 1.5 h after intake. Diazepam caused subjective drowsiness, clumsiness, mental slowness etc. as much as or more than lorazepam. The combination of 1 mg flupentixol and diazepam modified performance as much as diazepam alone. After the administration of 1 mg flupentixol, plasma concentrations were undetectable and levels after 2 mg were hardly detectable. Concentrations of lorazepam exceeded those of diazepam in direct bioassay, but they were much lower when bioassayed after solvent extraction.(ABSTRACT TRUNCATED AT 250 WORDS)

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Section: Discussionmentioning

confidence: 99%