Highlights
- Lexapro (escitalopram), a selective serotonin reuptake inhibitor (SSRI) antidepressant, is widely used in the long-term mental health treatment for depression and anxiety.
- Lexapro is FDA-approved for major depressive disorder (MDD) and generalized anxiety disorder (GAD), but is sometimes prescribed off-label for other mental health conditions.
- After starting Lexapro, some symptoms may improve after 1 to 2 weeks, but significant change usually takes 4 to 6 weeks.
You are most likely familiar with the name “Lexapro” as it is one of the
What Is Lexapro?
Lexapro, generic name escitalopram, belongs to the antidepressant class of medications known as selective serotonin reuptake inhibitors (SSRIs).
It is
How Does Lexapro Work?
Normally, chemical messengers called neurotransmitters carry information across the space (synapse) between neurons, or brain cells. Here is what happens step by step:
- The neurotransmitter serotonin moves from the cell with the message into the synapse and binds to the neighboring cell, delivering the message.
- Then, serotonin is taken back up into the first cell in a process called
reuptake[4] .
In certain mental health conditions, such as depression and anxiety, serotonin levels are thought to be imbalanced or low in certain essential places (although this theory remains debated).
Lexapro is a selective serotonin reuptake inhibitor, meaning it blocks serotonin reuptake. This increases serotonin levels in the synapse, helping manage anxiety and regulate mood.
How Long Does Escitalopram (Lexapro) Take to Work for Depression or Anxiety?
You might feel Lexapro starting to work in the first couple of weeks. However, when treating symptoms of depression and anxiety, it usually takes several weeks to experience the full therapeutic benefits of escitalopram:
- Major depressive disorder (MDD):
- Generalized anxiety disorder (GAD):
These are guidelines, and your timeline might differ.
Is Lexapro Fast-Acting?
In very basic terms, escitalopram (Lexapro) is a highly active form of
When measuring how well a medication is working, researchers use different fixed treatment periods:
- Early Phase: Between 1 and 4 weeks
- Acute Phase: Between 6 and 12 weeks.
- Follow-up Phase: Between 4 and 6 months
When Does Lexapro Peak in Your System?
Like all other SSRIs, it takes time to see Lexapro’s therapeutic benefits, even though it gets into your system immediately. Several factors influence when Lexapro starts working, which is why it is essential to stick to your clinician’s prescription.
Your dose and escitalopram blood levels affect how long it takes to feel Lexapro’s effects and adjust to its side effects. This applies not only to when you first start taking it, but also to how long it takes for an increased dose to work.
Although it is not set in stone, here’s a general timeline of how long Lexapro takes to kick in and what it feels like when it starts to work.
The Lexapro Timeline
| Time since first dose | Lexapro blood levels and actions | What to expect |
| 1 to 2 weeks | Lexapro peak blood level: Escitalopram Each day, Lexapro blood levels rise until finally the peaks even out, reaching a steady level. | You may experience common side effects of Lexapro such as headaches, nausea, exhaustion, trouble sleeping, and increased anxiety |
| 7 to 10 days | The onset of steady state: Lexapro blood levels stabilize (no more peaks) after taking it daily for | Side effects improve as your body adjusts to the medication. |
| 2 to 4 weeks | Some people feel mild symptom improvement. | |
| 4 to 8 weeks | Lexapro peak time for symptom relief, full effect: It takes weeks for brain chemistry changes and nerve conduction to happen. |
|
| After 8 weeks |
|
What Can Affect the Effectiveness of Lexapro?
It is important to understand that sometimes Lexapro works more quickly or slowly than these timeframes because of the following factors:
- Medication Adherence: Not taking Lexapro as prescribed every day, missing doses, or slow titration due to side effects can influence effectiveness.
- Age: Older adults have a higher risk of side effects and may need a lower dose.
- Individual Brain Chemistry: Brains are
wired and transmit messages differently[6] , so escitalopram effects vary. - Genetics: Certain genes influence how quickly the body breaks down Lexapro, and this changes its blood levels and effects.
- Other Medical Conditions: Liver problems can affect how quickly your body processes Lexapro and may require a lower dose. Kidney problems usually have less effect, although your healthcare provider may use additional caution if you have severe kidney disease.
- Drug Interactions: If Lexapro shares a metabolism pathway with another medication, this might increase or decrease its levels. Some other mental health medications cannot be used at the same time, e.g., monoamine oxidase inhibitors.
This is why you must tell your clinician your full medical history and all the different medications you’re taking. This information helps them to individualize your medication management plan.
How to Tell If Lexapro Is Working
Here is a checklist of signs to let you know that Lexapro is working for your
- Your mood has improved.
- You feel better about yourself and more confident.
- You worry less and have fewer anxious spirals.
- You don’t feel as restless or irritable anymore.
- Your muscles are less tense.
- You’re sleeping better.
- You have more energy and feel motivated.
- Your appetite is back to normal.
- Your concentration and motivation are better.
- You are interested again in activities you normally enjoy.
What to Do If You Think Lexapro Is Not Working
Although you now know that Lexapro does not work right away for depression and anxiety, if you think it’s not improving symptoms as quickly as you expected, eating a balanced diet, exercising regularly, and getting sufficient sleep, might make a difference.
Also, contact your clinician for advice if you’re concerned. They may suggest you wait a few more weeks, change your Lexapro dosage, add or switch medications, or recommend cognitive-behavioral therapy.
Never stop the medication without talking to a healthcare practitioner first because there is
Conclusion
Although guidelines outline how long Lexapro takes to reach full effect, this can vary slightly from person to person. If you’re concerned that escitalopram isn’t working for you or you think you might have anxiety or depression, you can book an online appointment with one of MEDvidi’s licensed clinicians.
Frequently Asked Questions
Why does Lexapro take so long to work?
It may seem like Lexapro takes so long to work because of its mechanism of action and its effects on the body. Lexapro begins affecting serotonin soon after you start taking it, but improvement in anxiety or depression usually takes longer. Over several weeks, the brain gradually adapts to these changes in serotonin signaling, which is thought to contribute to Lexapro’s therapeutic effects.
Does Lexapro work immediately?
You might feel Lexapro immediately through its side effects, but it does not work right away to treat mood and anxiety, taking four to eight weeks to notice a significant difference.
What does it feel like when Lexapro starts working?
When Lexapro starts working, you may notice gradual improvement in one or several areas, for example: you’ll feel your mood improve; self-confidence and enjoyment of activities return; anxiety and worry decrease; and your sleep, energy levels, motivation, and concentration normalize.
When is the best time to take Lexapro?
If Lexapro makes you drowsy, it’s usually recommended to take it at night; if it keeps you awake, switch to the morning. But always at the same time every day.
How long can you take Lexapro?
There is no time limit on how long you can take Lexapro if it is working well, unless your clinician feels it is no longer appropriate or safe. This is why regular follow-ups are essential.
Can you feel Lexapro working after 1 week?
Some people can feel Lexapro starting to help after a week or two. This initial symptom improvement continues, and many patients experience substantial benefit by 4 to 8 weeks.
