Yes, Lexapro (escitalopram) can cause insomnia, especially during the first few weeks of treatment.
This is a known side effect that occurs as your body adjusts to changes in serotonin levels caused by the medication. While some people report difficulty falling or staying asleep, others may feel more fatigued or sleepy. The sleep-related effects of Lexapro can vary from person to person.
Why Does Lexapro Cause Insomnia?
Lexapro is a selective serotonin reuptake inhibitor (SSRI), commonly prescribed for depression and anxiety. It works by increasing serotonin levels in the brain, which helps regulate mood — but serotonin also plays a role in sleep-wake cycles. This chemical shift may temporarily interfere with your ability to sleep, particularly:
- When starting the medication
- When increasing or changing the dosage
- If taken later in the day
How Long Does Insomnia from Lexapro Last?
For many people, insomnia is temporary and improves within 2–4 weeks as the body gets used to the medication. However, if sleep issues persist beyond this adjustment period, it may require a dosage change or a different treatment approach.
What Can You Do If Lexapro Is Causing Insomnia?
Here are a few strategies that might help:
- Take Lexapro in the morning instead of at night
- Maintain a regular sleep schedule and limit screen time before bed
- Avoid caffeine and alcohol in the evening
- Talk to your doctor about adjusting the dose or switching medications if the insomnia doesn’t improve
When to Seek Help
If Lexapro-related insomnia is affecting your daily life or worsening your mental health symptoms, it’s important to speak with your healthcare provider. Never stop or change your medication without medical advice.
Summary
Lexapro may cause temporary insomnia, especially early in treatment.
For most people, this side effect improves over time. If it persists, consult your doctor for personalized adjustments.