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[Delay of the antidepressant effect: clinical studies]
M Escande1, V Gentil, M Frexinos
1Service de Psychiatrie adulte, CHU, Hôpital Purpan-Casselardit, Toulouse.
L'Encephale
|March 1, 1995
Summary
Antidepressant medication effects are delayed, typically appearing 4-6 weeks after treatment initiation. While some early stimulant or sedative effects occur, they do not predict long-term response, with placebo effects being significant.
Area of Science:
- Psychiatry
- Pharmacology
Context:
- Controlled trials reveal a significant delay in antidepressant efficacy, typically observed between weeks 4-6.
- Early stimulant or sedative effects, though present, do not predict treatment outcomes.
Purpose:
- To analyze the onset of antidepressant effects and influencing factors.
- To differentiate between early drug effects, placebo responses, and spontaneous remission.
Summary:
- Antidepressant drug effects manifest significantly between the fourth and sixth weeks of treatment.
- Early effects, while more pronounced with antidepressants than placebo, lack predictive value for terminal response.
- Placebo effects are substantial and can influence perceived treatment timelines, with spontaneous remission also a factor.
Impact:
- Understanding the delayed onset of antidepressant action is crucial for managing patient expectations and adherence.
- Distinguishing between drug efficacy and placebo response is essential for accurate clinical assessment.
- Optimizing treatment strategies may involve considering factors that influence the delay, such as pulse loading doses.