ApprovedFDA approvedATC · N06AB10Rx · Prescription only (Rx)

Escitalopram

SSRI, S-enantiomer of citalopram (Lundbeck Lexapro/Cipralex). First-line Rx for MDD + anxiety disorders. Cipriani 2018 meta-analysis: top-3 efficacy.

Escitalopram vial

WHAT IS ESCITALOPRAM?

Detailed overview

Escitalopram is the active S-enantiomer of citalopram (R-enantiomer is pharmacologically inactive and may slightly interfere). Developed by Lundbeck (Lexapro FDA 2002), one of the cleanest SERT-selective SSRIs. Per Cipriani 2018 Lancet (PMID 29477251) network meta-analysis, top-3 of 21 antidepressants for efficacy-tolerability ratio (alongside vortioxetine, mirtazapine). Lader 2004 (PMID 15125014) trial showed MDD superiority over citalopram at 8 weeks. Generally better tolerability than citalopram, with lower QTc-prolongation risk (FDA 2011 warning for citalopram > 40 mg/day, escitalopram > 20 mg/day).

Data console

Lab data

/lab/molecular-data.jsonLIVE
> ATC codeN06AB10
> PrescriptionPrescription only (Rx)
> MechanismSelective allosteric SERT (serotonin transporter) inhibitor…
> Half-life27-32 h (once-daily dosing)
> Onset2-6 weeks (full antidepressant response)
> Bioavailability~80% (oral, food-independent – FDA Lexapro label)

Safety

Side effects, stop signs, contraindications

Side effects · 8

  • Increased risk of suicidal thoughts and behavior in patients under 25, especially at treatment start and dose changes (FDA boxed warning); close monitoring required.
  • Serotonin syndrome (agitation, hyperthermia, myoclonus, tachycardia, diarrhea), especially combined with other serotonergic drugs; can be life-threatening.
  • Discontinuation syndrome on abrupt stopping: dizziness, headache, irritability, 'electric shock' sensations, sleep disturbance; requires slow tapering.
  • Sexual dysfunction (reduced libido, delayed orgasm, erectile dysfunction) common (about 10–20%) and may persist.
  • Gastrointestinal effects: nausea (10–15%), diarrhea, dry mouth, decreased appetite; usually in the first weeks.
  • Dose-dependent QT prolongation (> 20 mg/day not recommended) with risk of torsades de pointes; insomnia, headache, sweating also common.
  • Hyponatremia / SIADH, especially in the elderly and with diuretics; fatigue, confusion, seizures may be warning signs.
  • Increased bleeding risk (with NSAIDs, aspirin, anticoagulants) and induction of mania/hypomania in those with bipolar predisposition.

Contraindications · 3

  • MAOi within 14 days (serotonin syndrome)
  • Concurrent pimozide (QT prolongation)
  • Congenital long-QT syndrome

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Studies

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Have a question about Escitalopram?

Educational drug info from official sources (PubMed, FDA, EMA). Does NOT replace medical consultation or the SmPC. Talk to your doctor!

MolekulaX Editorial Team·Source-verified · PubMed · FDA · EMA
Updated: June 19, 2026

The information here is for educational and scientific purposes only. Medication use requires medical consultation and a prescription. The indications, dose ranges, and side effects listed here do NOT replace the official Summary of Product Characteristics (SmPC) or consultation with a physician. Do not start or stop any medication on your own. In an emergency, call your local emergency number.