Most people take Lexapro for at least 6 to 12 months, though the exact duration depends on whether you’re treating depression, anxiety, or both, and whether this is your first episode or a recurring one. The general rule: continue for at least 9 months after your symptoms fully resolve, not 9 months from when you started taking it. That distinction matters because it takes weeks for the medication to reach full effect and potentially longer to achieve complete remission.
When Lexapro Starts Working
You may notice early improvements in sleep, energy, and appetite within the first one to two weeks. But the full therapeutic effect typically takes four to six weeks. This lag is important context for the “how long” question, because many people feel better at week three or four and wonder if they’re done. They’re not. That early improvement is the medication reaching effective levels in your system, not a sign that treatment is complete.
The Standard Timeline for Depression
Treatment for major depression has two distinct phases. The first is the acute phase, which lasts about 8 weeks. During this period, your prescriber is finding the right dose and monitoring whether the medication is working. If Lexapro is effective, you then move into the continuation phase.
Current guidelines recommend staying on the medication for up to 9 months after your symptoms have fully resolved. That means if it takes 8 weeks to feel well, you’re looking at roughly 11 months of total treatment at minimum. The goal of this longer stretch isn’t to keep treating active symptoms. It’s to let your brain chemistry stabilize so that when you eventually stop, the depression doesn’t come back.
The relapse numbers make the case clearly. A meta-analysis of antidepressant discontinuation found that about 35% of people relapse within 6 months of stopping, and 45% relapse within 12 months. Interestingly, continuing treatment beyond 6 months after remission didn’t appear to reduce relapse risk further, which is why the 6-to-9-month post-remission window is the standard recommendation for a first episode.
The Timeline for Anxiety
If you’re taking Lexapro for generalized anxiety disorder, the recommendation is similar but slightly more conservative. Guidelines call for continuing treatment for 6 to 12 months after remission. Anxiety disorders tend to have a waxing and waning course, meaning symptoms can flare and subside unpredictably. That longer treatment window helps smooth out those fluctuations and reduces the chance that stopping triggers a return of symptoms.
When Longer Treatment Makes Sense
Some people stay on Lexapro for years. This is common and, according to the NHS, safe for most people. There don’t appear to be lasting harmful effects from taking it for many months or years. The main long-term side effect to be aware of is sexual dysfunction (lower sex drive or difficulty with arousal), which in some cases can persist even after stopping the medication.
Your prescriber is more likely to recommend extended or indefinite treatment if you’ve had multiple depressive episodes, if your episodes were severe, if you have a strong family history of depression, or if previous attempts to stop medication led to relapse. For people with three or more episodes of major depression, many clinicians recommend staying on an antidepressant indefinitely as a preventive measure.
How Prescribers Decide You’re Ready to Stop
The key criterion is true remission, not just feeling “better.” Partial improvement isn’t enough. Clinicians look for a return to normal functioning across your daily life: work, relationships, social activity, and sleep. You should feel like yourself, not just less depressed or less anxious. If you still have lingering symptoms, even mild ones, stopping too soon significantly increases the chance they’ll return in full.
Timing also matters. Prescribers generally avoid discontinuation during periods of high stress, major life transitions, or seasonal windows when you’ve historically felt worse. The best time to stop is when your life is relatively stable and you’ve been feeling well for several months.
What Tapering Looks Like
You should never stop Lexapro abruptly. Even though it leaves your body relatively quickly (about 6 days for 99% of the drug to clear), sudden discontinuation can cause withdrawal symptoms: dizziness, irritability, nausea, brain zaps (brief electric-shock sensations), and flu-like feelings.
Tapering means gradually reducing your dose over weeks. The length of your taper depends on your current dose, how long you’ve been on the medication, and whether you’ve had withdrawal symptoms before. Someone on 10 mg for 8 months will likely taper faster than someone on 20 mg for three years. Higher doses and longer treatment generally require a slower, more gradual reduction. Your prescriber will set the specific schedule, but expect the process to take anywhere from a few weeks to a few months.
If withdrawal symptoms appear during tapering, that doesn’t necessarily mean you need to stay on the medication. It often means the taper is moving too fast, and slowing down or holding at the current dose for a while can help your body adjust.
A Practical Summary of Timelines
- First effects: 1 to 2 weeks for early improvements; 4 to 6 weeks for full benefit
- First episode of depression: 6 to 9 months after symptoms fully resolve (often 10 to 14 months total)
- Generalized anxiety disorder: 6 to 12 months after remission
- Recurring depression or severe episodes: 2 years or longer, sometimes indefinitely
- Tapering period: several weeks to several months, depending on dose and duration