How long does it take для SSRIs к work для anxiety?
Reviewed by the WeighedHealth Editorial Team against primary clinical sources — FDA labeling, peer-reviewed trials, and specialty-society guidelines.
Content current as of July 2026; updated when guidance or availability changes.
SSRIs (sertraline, escitalopram, paroxetine) typically show initial anxiety reduction at 4-6 weeks and full therapeutic effect at 8-12 weeks. The first 1-2 weeks often INCREASE anxiety paradoxically as norepinephrine receptors adjust — many patients stop here, mistaking the adjustment period для drug failure. Starting at half-dose (12.5 mg sertraline, 5 mg escitalopram) для the first 7-14 days reduces this activation. Side effects (nausea, headache, sexual dysfunction, fatigue, vivid dreams) appear early and typically improve over weeks 2-4. If side effects persist past 4 weeks or efficacy isn't apparent by week 8, dose adjustment or switching is warranted. Don't switch SSRIs after only 2-3 weeks — this is too early к judge response.
Related questions
SSRI vs SNRI for anxiety: which is better?
SSRIs (sertraline, escitalopram) and SNRIs (venlafaxine, duloxetine) are both first-line for anxiety. Efficacy similar. SSRIs tried first (milder side effects). SNRIs better if SSRI fails OR comorbid chronic pain/fatigue. Both take 4-6 weeks. Taper к discontinue.
What are the most common anxiety medication side effects?
Top SSRI/SNRI side effects: nausea (30-40%, resolves), sexual dysfunction (15-30%, persistent), headache (10-20%, transient), fatigue/insomnia (10-20%), weight change (5-15%, varies by drug), emotional blunting (5-10%). Always taper к discontinue.