Does Lexapro Cause Tiredness?
Yes, tiredness or fatigue is a recognized side effect of Lexapro (escitalopram), an SSRI antidepressant. Clinical data and patient reports list somnolence (drowsiness) and fatigue among common effects, affecting 5-10% of users in trials.[1][2]
How Common Is Tiredness on Lexapro?
In placebo-controlled studies, somnolence occurred in up to 13% of patients on Lexapro versus 6% on placebo. Fatigue appears in 3-5% of cases. These rates vary by dose (higher at 20mg) and duration—often peaking in the first 1-2 weeks.[1][3]
Why Does Lexapro Cause Tiredness?
SSRIs like Lexapro boost serotonin, which can disrupt sleep-wake cycles initially. This leads to daytime drowsiness as the brain adjusts. Factors like individual metabolism, concurrent medications, or underlying depression amplify it.[2][4]
How Long Does Tiredness Last?
Most experience fatigue for 1-4 weeks as tolerance builds. Persistent cases beyond 6 weeks may signal intolerance; dose adjustment or switching helps 70-80% of affected patients.[3][5]
What Do Patients Report About Lexapro Fatigue?
Real-world data from forums and apps like Drugs.com show ~15% of reviews mention tiredness, often described as "extreme exhaustion" early on. Many note it fades, but some quit due to it interfering with work or driving.[6]
Tips to Manage Tiredness on Lexapro
- Take at bedtime to align drowsiness with sleep.
- Avoid alcohol and caffeine, which worsen it.
- Exercise lightly in mornings; ensure 7-9 hours sleep.
- Doctors may add modafinil or lower dose if severe.[4][5]
When to Worry About Tiredness
Sudden severe fatigue could indicate serotonin syndrome (with confusion, fever) or unrelated issues like anemia. Contact a doctor if it persists >4 weeks, worsens, or pairs with suicidal thoughts.[2][7]
Lexapro vs. Other Antidepressants for Fatigue
Lexapro causes less sedation than Paxil (paroxetine, ~20% somnolence) but more than Prozac (fluoxetine, ~4%). Wellbutrin (bupropion) has near-zero fatigue risk as an alternative.[1][3]
[1]: Lexapro Prescribing Information, FDA (https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/021323s047lbl.pdf)
[2]: Mayo Clinic - Escitalopram Side Effects (https://www.mayoclinic.org/drugs-supplements/escitalopram-oral-route/side-effects/drg-20063707)
[3]: Drugs.com - Lexapro Side Effects (https://www.drugs.com/sfx/lexapro-side-effects.html)
[4]: WebMD - SSRIs and Fatigue (https://www.webmd.com/depression/ssris-side-effects)
[5]: NIH PubMed - SSRI Adaptation Review (https://pubmed.ncbi.nlm.nih.gov/12399837/)
[6]: Drugs.com User Reviews (https://www.drugs.com/comments/escitalopram/lexapro.html)
[7]: FDA Serotonin Syndrome Warning (https://www.fda.gov/drugs/drug-safety-and-availability/fda-drug-safety-communication-serotonin-syndrome-risk-ssris-and-snris)