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Related Experiment Videos

Fluoxetine: activating and sedating effects at multiple fixed doses.

C M Beasley1, M E Sayler, A M Weiss

  • 1Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285.

Journal of Clinical Psychopharmacology
|October 11, 1992
PubMed
Summary
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Fluoxetine, an activating antidepressant, showed distinct dose-dependent effects on activation and sedation in major depressive disorder. Activation increased at higher doses, while sedation rose linearly with dose.

Area of Science:

  • Psychiatry
  • Clinical Pharmacology

Background:

  • Selective serotonin reuptake inhibitors (SSRIs) are often associated with activating properties.
  • Understanding the balance between activation and sedation is crucial for antidepressant treatment.

Purpose of the Study:

  • To evaluate activation and sedation rates, dose-effect relationships, and temporal patterns of fluoxetine treatment in major depressive disorder.
  • To compare the effects of different fixed fluoxetine doses (5-60 mg/day) against placebo.

Main Methods:

  • Analysis of adverse event data from two pooled clinical trials in major depressive disorder patients.
  • Categorization of adverse events into activation (nervousness, anxiety, agitation, insomnia) and sedation (somnolence, asthenia).

Main Results:

Related Experiment Videos

  • Both activation and sedation were statistically significant treatment-emergent effects.
  • Activation rates increased notably at 60 mg/day, while sedation increased linearly up to 40 mg/day.
  • Discontinuations due to activation or sedation were infrequent.

Conclusions:

  • Fluoxetine exhibits differential dose-response effects for activation and sedation.
  • Temporal patterns of onset and persistence for activation and sedation varied, with sedation potentially persisting longer.