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Escitalopram

"Cleanest" SSRI — most selective SERT binding, fewest CYP interactions, generally best-tolerated.

Aliases (2)
Lexapro · Cipralex
TYPICAL DOSE
5mg AM x 7 days → 10mg AM target
Daily
ROUTE
CYCLE
STORAGE

Overview

What is Escitalopram?

Escitalopram (Lexapro) is the S-enantiomer of citalopram and one of the most selective SSRIs available. FDA-approved for major depression and generalized anxiety disorder; widely prescribed worldwide.

Key Benefits

Effective for depression, anxiety disorders (GAD, panic, OCD off-label), with a generally favorable side-effect profile compared to older SSRIs. Cleaner pharmacology than racemic citalopram, fewer QT concerns at therapeutic doses.

Mechanism of Action

Selectively inhibits the serotonin transporter (SERT), increasing synaptic serotonin. Allosterically binds a secondary SERT site that may potentiate primary inhibition. Minimal off-target binding.

Pharmacokinetics

·
PeakHalf-life
Approximate curve — visual aid only, not data-precise PK

What to Expect

  • Week 1
    Tolerability and dose-response.
  • Week 2-4
    Early effect window.
  • Week 4-8
    Peak benefit assessment.
  • Week 8+
    Cycle decision point.

Side Effects & Safety

  • Common (>10%): Sexual dysfunction (30-60%), nausea early, somnolence, fatigue, ejaculation delay.
  • Less common (1-10%): Insomnia, weight gain (modest, long-term), sweating, bruxism.
  • Rare-serious (<1%): Serotonin syndrome, hyponatremia, QT prolongation (FDA limited to 20mg), suicidal ideation <25 yo (FDA black box).
  • Specific watch periods: First 4 weeks for activation; baseline + repeat ECG if cardiac risk factors.

References

PMID 29477251

pubmed.ncbi.nlm.nih.gov · 2018

Cipriani 2018 network MA.

View Study

PMID 19852904

pubmed.ncbi.nlm.nih.gov

Escitalopram allosteric SERT binding.

View Study

PMID 21646573

pubmed.ncbi.nlm.nih.gov

Escitalopram QT prolongation FDA review.

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PMID 22424813

pubmed.ncbi.nlm.nih.gov

Escitalopram for GAD meta-analysis.

View Study

PMID 18316756

pubmed.ncbi.nlm.nih.gov

SSRI sexual dysfunction.

View Study
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