Navigating Lexapro Side Effects: Common Symptoms and When They Subside

If you've recently started Lexapro, you're not alone in wondering what to expect. Lexapro (escitalopram) is a commonly prescribed selective serotonin reuptake inhibitor (SSRI) used to treat depression and generalized anxiety disorder. It's considered effective and generally well tolerated, but like all medications, it can cause side effects.

Understanding Lexapro side effects, when they tend to appear, and how long they usually last can help you feel more prepared and less anxious during the adjustment period.

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Why Lexapro Causes Side Effects

Lexapro works by increasing serotonin levels in the brain. Serotonin helps regulate mood, sleep, appetite, and digestion. When serotonin levels shift, your body and brain need time to adjust.

Most Lexapro side effects happen during the first few weeks of treatment and improve as your system adapts.

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Common Lexapro Side Effects

Many side effects are mild to moderate and temporary. The most frequently reported include:

1. Digestive Issues

These are among the earliest symptoms people notice.

• Nausea
• Diarrhea
• Constipation
• Upset stomach
• Loss of appetite

When they subside:
Digestive side effects often improve within 1–2 weeks. Taking Lexapro with food may help reduce nausea.

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2. Sleep Changes

Lexapro can affect sleep patterns in different ways.

• Insomnia
• Feeling drowsy or fatigued
• Vivid dreams

When they subside:
Sleep disturbances often improve within 2–4 weeks. If insomnia persists, your doctor may adjust the timing of your dose.

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3. Headache

Mild to moderate headaches are common early on.

When they subside:
Typically within the first 1–2 weeks.

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4. Increased Anxiety (Temporary)

Ironically, some people feel more anxious during the first week or two.

• Restlessness
• Jitteriness
• Increased nervous energy

This happens because serotonin shifts can temporarily stimulate certain brain circuits before stabilizing.

When they subside:
Usually within 1–3 weeks. If anxiety feels intense or unmanageable, speak to your doctor.

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5. Sexual Side Effects

Sexual changes are among the more persistent Lexapro side effects.

• Decreased libido
• Difficulty achieving orgasm
• Erectile dysfunction
• Delayed ejaculation

When they subside:
For some people, these improve after a few months. For others, they may persist while taking the medication. If this becomes bothersome, your doctor can discuss options such as dose adjustments or alternative treatments.

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6. Dry Mouth

A common but usually mild symptom.

When it subsides:
Often improves within a few weeks. Staying hydrated and chewing sugar-free gum can help.

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7. Sweating

Increased sweating, particularly night sweats, can occur.

When it subsides:
Sometimes improves over time, but may persist in some individuals.

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Less Common but Important Lexapro Side Effects

While most side effects are mild, there are rare but serious reactions you should be aware of.

1. Serotonin Syndrome (Rare but Serious)

This occurs when serotonin levels become dangerously high, especially if combined with other medications that affect serotonin.

Symptoms include:

• High fever
• Confusion
• Rapid heart rate
• Muscle stiffness
• Heavy sweating
• Agitation

This is a medical emergency. Seek immediate care if these symptoms occur.

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2. Suicidal Thoughts (Especially in Younger Adults)

SSRIs, including Lexapro, carry a warning about increased risk of suicidal thinking in children, teens, and young adults under 25—particularly during the first few weeks or after dose changes.

Watch for:

• Worsening depression
• New or increased suicidal thoughts
• Severe mood changes
• Aggressive behavior

If this occurs, contact a doctor immediately or seek emergency care.

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3. Severe Allergic Reaction

Rare, but symptoms may include:

• Rash
• Swelling of the face or throat
• Difficulty breathing

Call emergency services if this happens.

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Timeline: When Do Lexapro Side Effects Go Away?

Here's a general timeline to help set expectations:

Week 1

• Nausea
• Headache
• Increased anxiety
• Sleep changes

These are common and often temporary.

Weeks 2–4

• Digestive symptoms usually improve
• Anxiety begins stabilizing
• Sleep may normalize
• Mood may start improving

Weeks 4–8

• Full therapeutic effects may become noticeable
• Many early side effects resolve
• Sexual side effects may persist if present

Everyone responds differently. Some people experience minimal side effects, while others need dose adjustments.

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Tips for Managing Lexapro Side Effects

If you're struggling with Lexapro side effects, these strategies may help:

• Take the medication at the same time each day.
• Take it with food if nausea occurs.
• Avoid alcohol, especially early on.
• Stay hydrated.
• Prioritize sleep hygiene.
• Give it time—many symptoms fade within weeks.

Do not stop Lexapro abruptly without medical guidance. Stopping suddenly can cause withdrawal-like symptoms such as dizziness, irritability, and flu-like feelings.

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When to Contact a Doctor

You should speak to a doctor if:

• Side effects are severe or worsening
• Symptoms last longer than 4–6 weeks without improvement
• You experience suicidal thoughts
• You notice signs of serotonin syndrome
• Sexual side effects are affecting your quality of life
• You feel emotionally numb or unlike yourself

Any symptom that feels life-threatening or significantly concerning requires immediate medical attention.

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Checking In on Your Symptoms

If you're unsure whether what you're experiencing is typical or if you're currently on antidepressants and want to better understand your symptoms, a free online symptom checker can help you determine whether what you're feeling may be medication-related and guide you on next steps.

However, online tools are not a substitute for medical care. Always follow up with your healthcare provider for personalized advice.

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Balancing Benefits and Side Effects

It's important to weigh side effects against benefits. Untreated depression and anxiety carry their own serious health risks, including:

• Increased risk of substance misuse
• Sleep problems
• Relationship strain
• Impaired work performance
• Higher risk of suicide

For many people, Lexapro significantly improves mood, daily functioning, and overall quality of life. Side effects are often temporary and manageable.

If one SSRI doesn't work well for you, that doesn't mean all medications will cause the same problems. Treatment is highly individualized.

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The Bottom Line

Lexapro side effects are common, especially in the first few weeks. Most are mild and improve within 2–4 weeks as your body adjusts. Some, such as sexual side effects, may last longer but can often be managed with medical guidance.

The key points to remember:

• Early side effects are usually temporary.
• Do not stop the medication suddenly.
• Serious symptoms require immediate medical attention.
• Open communication with your doctor is essential.

If anything feels severe, unusual, or life-threatening, seek emergency care and speak to a doctor right away. Your safety comes first.

Starting an antidepressant can feel uncertain, but with the right information and medical support, most people navigate the adjustment period successfully and begin to experience meaningful improvements in their mental health.