Managing Lexapro Side Effects While Pregnant: What to Expect in Each Trimester

If you're pregnant and taking Lexapro (escitalopram), it's normal to have questions. You may be wondering how Lexapro side effects could affect you or your baby, and what changes to expect as your pregnancy progresses.

Lexapro is a commonly prescribed selective serotonin reuptake inhibitor (SSRI) used to treat depression and anxiety. For many people, staying on antidepressant treatment during pregnancy is important for their mental health and overall well-being. Untreated depression or anxiety can also pose risks during pregnancy, including poor nutrition, sleep problems, and difficulty with prenatal care.

This guide walks you through what to expect from Lexapro side effects during each trimester, based on credible medical evidence, and how to manage them safely.

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First Trimester (Weeks 1–13)

The first trimester is a critical time for fetal development. It's also when pregnancy symptoms and medication side effects can overlap.

Common Lexapro Side Effects in Early Pregnancy

Many of the typical Lexapro side effects may feel more noticeable early on:

• Nausea
• Fatigue
• Headache
• Dizziness
• Dry mouth
• Sleep disturbances
• Increased sweating

Because nausea and fatigue are also common in early pregnancy, it can be hard to tell what's causing what.

Is Lexapro Safe in the First Trimester?

Large studies of SSRIs, including escitalopram, suggest that the overall risk of major birth defects is low. Some research has examined possible associations between SSRIs and certain heart defects, but the absolute risk remains small.

For most patients:

• The benefits of treating moderate to severe depression or anxiety often outweigh the small potential risks.
• Abruptly stopping Lexapro can lead to withdrawal symptoms and relapse of depression or anxiety.

How to Manage Side Effects in the First Trimester

• Take Lexapro with food to reduce nausea.
• Stay hydrated.
• Take the medication at the same time each day.
• Ask your doctor whether switching to nighttime dosing could help with daytime fatigue.

Do not stop or change your dose without medical guidance.

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Second Trimester (Weeks 14–27)

The second trimester is often described as the most physically comfortable part of pregnancy. Many early pregnancy symptoms ease, and medication side effects may stabilize.

Lexapro Side Effects During the Second Trimester

By this stage:

• Nausea often improves.
• Sleep patterns may stabilize.
• Headaches may decrease.

However, some Lexapro side effects can continue, such as:

• Sexual side effects
• Mild tremor
• Increased sweating
• Gastrointestinal changes

In rare cases, SSRIs may contribute to:

• Mild increases in blood pressure
• Changes in weight

Your prenatal care provider will monitor your blood pressure and weight regularly, which helps detect any concerns early.

Mental Health Stability Matters

This trimester is often when patients feel more emotionally stable if treatment is working. Staying consistent with medication can:

• Reduce the risk of depressive relapse
• Support healthy sleep
• Improve appetite and self-care
• Lower the risk of postpartum depression

Untreated depression during pregnancy has been associated with preterm birth, low birth weight, and increased stress hormones. That's why ongoing treatment can be protective.

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Third Trimester (Weeks 28–Delivery)

The third trimester brings new physical demands and considerations.

Possible Late-Pregnancy Effects

Most people tolerate Lexapro well through the third trimester. However, some potential concerns include:

1. Neonatal Adaptation Syndrome

Babies exposed to SSRIs late in pregnancy may experience temporary symptoms after birth, such as:

• Jitteriness
• Rapid breathing
• Mild feeding difficulty
• Irritability
• Low blood sugar

These symptoms are typically:

• Mild
• Short-lived (resolving within days)
• Managed with routine newborn care

Severe complications are rare.

2. Persistent Pulmonary Hypertension of the Newborn (PPHN)

Some studies suggest a small increased risk of PPHN with SSRI use in late pregnancy. However:

• The condition remains rare overall.
• The absolute risk increase is small.
• Most babies exposed to SSRIs do not develop this condition.

Your obstetric and pediatric teams will monitor your baby after birth.

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Should You Stop Lexapro Before Delivery?

In the past, some providers recommended tapering SSRIs late in pregnancy. Current evidence does not routinely support this approach.

Stopping Lexapro late in pregnancy may:

• Trigger relapse of depression or anxiety
• Increase risk of postpartum depression
• Cause withdrawal symptoms

Any decision about adjusting your medication should be individualized and made with your prescribing physician and obstetric provider.

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Monitoring Throughout Pregnancy

If you remain on Lexapro during pregnancy, your care team may:

• Monitor mood symptoms regularly
• Track blood pressure
• Check weight gain patterns
• Coordinate care between psychiatry and obstetrics

If you're experiencing unusual symptoms and want to better understand whether they could be related to your antidepressant use, you can use a free symptom checker for currently on antidepressants to help identify which symptoms may need medical attention.

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When to Call a Doctor Immediately

While most Lexapro side effects are mild, seek urgent medical care if you experience:

• Thoughts of harming yourself
• Severe agitation or confusion
• High fever with muscle stiffness
• Severe allergic reaction (swelling of face or throat, difficulty breathing)
• Sudden vision changes
• Severe headache with high blood pressure

Any potentially life-threatening symptom requires immediate medical evaluation.

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Breastfeeding Considerations

Lexapro does pass into breast milk in small amounts. However:

• Most studies show minimal adverse effects in nursing infants.
• Escitalopram is often considered compatible with breastfeeding.
• Babies should be monitored for irritability, feeding issues, or excessive sleepiness.

Discuss breastfeeding plans with your healthcare provider before delivery so you can make an informed choice.

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Emotional Health Is Physical Health

It's important not to view medication decisions through fear alone. Untreated depression and anxiety during pregnancy can:

• Increase stress hormones
• Affect sleep and nutrition
• Reduce engagement in prenatal care
• Increase risk of postpartum depression

For many patients, staying on Lexapro provides emotional stability that benefits both parent and baby.

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Practical Tips for Managing Lexapro Side Effects During Pregnancy

• Take medication consistently at the same time daily.
• Use a pill organizer to prevent missed doses.
• Eat small, frequent meals to reduce nausea.
• Prioritize sleep hygiene.
• Stay physically active as recommended by your obstetric provider.
• Attend all prenatal appointments.
• Keep open communication with your mental health provider.

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The Bottom Line

Most Lexapro side effects during pregnancy are manageable and similar to those experienced outside of pregnancy. Serious complications are uncommon, and for many individuals, the benefits of continued treatment outweigh the risks.

Every pregnancy is unique. Medication decisions should always be personalized based on:

• Severity of depression or anxiety
• Past relapse history
• Current stability
• Support system
• Obstetric health

If you are pregnant and taking Lexapro—or considering stopping it—speak to your doctor before making any changes. Never discontinue antidepressants abruptly without medical supervision.

And if you notice new or concerning symptoms, especially anything severe or potentially life-threatening, seek medical care immediately.

Your mental health matters. With the right support and monitoring, many people continue Lexapro safely throughout pregnancy and go on to have healthy pregnancies and healthy babies.