How long does Lexapro take to work?
Last updated September 3, 2026.
Several weeks: the NHS says symptoms may take several weeks to start improving, with the full effect around 4 to 6 weeks. Low starting doses (increased after a few weeks) cut side effects but stretch the wait. Expect the awkward first phase - nausea, sleep changes, a brief anxiety bump - mostly settling within a couple of weeks. Working looks like the volume on dread turning down and ordinary days becoming manageable, not euphoria. Same time daily, with or without food; do not judge before a fair 4-to-6-week trial; never stop suddenly when you improve - courses usually run 6 months or more, and stopping is a planned, gradual reduction. Same-day call for worsening mood or self-harm thoughts. In crisis: 988 in the US, or your local crisis line. Pymander is a free AI doctor, 24/7 by text, and can help you through the wait.
What to do
- Same time daily: pick a slot and keep it.
- Judge at 4 to 6 weeks, not 4 to 6 days: then adjust with your doctor.
- Feeling better means keep going: courses run months past improvement.
- Worsening mood means a same-day call: and 988 in the US for crisis.
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