Lexapro (Escitalopram) Dosing
Start escitalopram at 10 mg once daily for all adults and adolescents 12 years and older with depression, and for adults and children 7 years and older with generalized anxiety disorder. 1
Adult Dosing
Major Depressive Disorder
- Starting dose: 10 mg once daily 1
- Maintenance dose: 10 mg daily is effective for most patients
- Maximum dose: 20 mg daily, but trials failed to demonstrate greater benefit of 20 mg over 10 mg 1
- Dose escalation: If needed, increase to 20 mg after at least 1 week 1
Important consideration: For moderate depression (MADRS 22-29), 10 mg is the optimal dose with effect size >0.40. For severe depression (MADRS ≥30), 20 mg may be needed 2. This means you should assess severity before deciding whether dose escalation is necessary.
Generalized Anxiety Disorder
- Starting dose: 10 mg once daily 1
- Maximum dose: 20 mg daily 1
- Dose escalation: If needed, increase to 20 mg after at least 1 week 1
- Efficacy: 10 mg/day is effective for most GAD patients, with significant improvement beginning at week 1-2 3, 4
Pediatric Dosing
Adolescents (12-17 years) with Depression
- Starting dose: 10 mg once daily 1
- Maximum dose: 20 mg daily 1
- Dose escalation: Wait at least 3 weeks before increasing to 20 mg 1
Children and Adolescents (7-17 years) with GAD
- Starting dose: 10 mg once daily 1
- Maximum dose: 20 mg daily 1
- Dose escalation: Wait at least 2 weeks before increasing to 20 mg 1
Critical caveat for pediatric use: The harm-benefit ratio is concerning in pediatric GAD. Children exposed to escitalopram are more likely to become suicidal than to experience clinically relevant anxiety improvement 5. The boxed warning indicates pooled absolute rates for suicidal ideation are 1% with antidepressants vs 0.2% with placebo (NNH=143) 6. Close monitoring for suicidality is mandatory, especially in the first months and after dose adjustments 6, 1.
Elderly and Special Populations
Elderly Patients
- Recommended dose: 10 mg once daily 1
- Rationale: Escitalopram is a preferred agent for elderly patients with depression 7
- Do not routinely increase: Higher doses increase adverse effects without clear additional benefit in this population 1
Hepatic Impairment
- Recommended dose: 10 mg once daily 1
Renal Impairment
Administration Details
- Timing: Once daily, morning or evening 1
- Food: With or without food 1
- Time to response: Clinically significant improvement typically by week 6, maximal improvement by week 12 6
- Starting strategy: Consider starting with a subtherapeutic "test" dose in patients prone to anxiety/agitation, as initial SSRI adverse effects can include increased anxiety 6
Dose Titration Strategy
For shorter half-life SSRIs like escitalopram 6:
- Mild to moderate presentations: Increase dose at 1-2 week intervals if needed 6
- Severe presentations: Faster up-titration may be indicated as tolerated 6
- Key principle: Higher doses are associated with more adverse effects without clear dose-response relationship for efficacy 6
Discontinuation
Never stop abruptly. Gradual dose reduction is recommended to avoid discontinuation syndrome 1. While escitalopram has less discontinuation syndrome risk than paroxetine, sertraline, or fluvoxamine 6, symptoms can still occur including dizziness, fatigue, nausea, insomnia, sensory disturbances, and anxiety 6. If intolerable symptoms emerge during taper, resume the previous dose and decrease more gradually 1.
Drug Interactions and Contraindications
- Absolute contraindication: MAOIs - allow 14 days between stopping MAOI and starting escitalopram, or vice versa 1
- QT prolongation: Escitalopram/citalopram have the least effect on CYP450 enzymes and lower drug interaction potential compared to other SSRIs 6, but citalopram (not escitalopram specifically) can prolong QT at doses >40 mg/day 6
- Serotonin syndrome risk: Exercise caution when combining with other serotonergic drugs including tramadol, meperidine, dextromethorphan, and other antidepressants 6
Screening Before Initiation
Screen all patients for personal or family history of bipolar disorder, mania, or hypomania before starting escitalopram 1. SSRIs can precipitate manic episodes in susceptible individuals.