By Dr. Nicole Siegfried, PhD, CEDS — Chief Clinical Officer, Lightfully Behavioral Health

Dr. Nicole Siegfried is a licensed clinical psychologist with over 20 years of experience in behavioral health. She works with individuals managing complex conditions, including mood disorders that may involve medication support. In this Q&A, she offers clear, clinically grounded guidance to help patients better understand lamotrigine and its potential side effects.

Starting a new medication can bring relief and uncertainty at the same time. If you’ve been prescribed lamotrigine or are considering it, you may have questions about what to expect. Many people prescribed lamotrigine have questions about side effects, safety and what to expect.

Lamotrigine (brand name Lamictal) is a medication that clinicians often use to help stabilize moods in people with bipolar disorder as maintenance treatment. While it was originally created to treat seizures, researchers found it is very effective at delaying or preventing the “lows” or depressive episodes associated with mood disorders. Like any medication, it may cause side effects. Understanding them can help you feel more prepared and confident in your treatment plan.

What is lamotrigine and why is it prescribed?

Dr. Siegfried — Lamotrigine is a prescription medication that affects brain signaling involved in mood regulation. It is commonly used to help prevent mood episodes in bipolar disorder, particularly depressive episodes.

Providers may prescribe lamotrigine to help:

• Stabilize mood over time
• Reduce mood episode frequency
• Support long-term treatment plans

Medication decisions are always individualized. Your provider considers symptoms, medical history and treatment goals.

Why is lamotrigine started slowly?

Dr. Siegfried — Lamotrigine is typically increased gradually over several weeks. This process is called titration, which means slowly adjusting a medication dose.

Slow titration helps:

• Reduce the chance of certain side effects
• Allow the body to adapt safely
• Support long-term tolerability
• Reduce the risk of serious skin reactions

Following the prescribed schedule closely can support safer use of the medication.

What are the most common side effects?

Dr. Siegfried — Many people tolerate lamotrigine well, but some may experience mild side effects, especially when starting the medication or adjusting the dose.

Common side effects may include:

• Headache
• Dizziness
• Nausea
• Sleep changes
• Blurred vision
• Rash
• Fatigue

These symptoms often improve as the body adjusts. If symptoms feel uncomfortable or persistent, a provider can help evaluate next steps.

What is the lamotrigine rash and why is it important?

Dr. Siegfried — One of the most well-known concerns about lamotrigine is the possibility of a serious skin reaction. This reaction is rare but important to understand.

A mild rash may occur in some people and may not be dangerous. However, a serious rash requires immediate medical attention.

Warning signs may include:

• Widespread rash or peeling skin
• Fever
• Mouth sores
• Eye irritation
• Flu-like symptoms
• Swollen lymph nodes
• Facial swelling
• Severe fatigue
• Yellowing of the skin or eyes
• Dark urine

If any rash appears while taking lamotrigine, it is important to contact your provider right away.

How likely is a serious rash?

Dr. Siegfried — Serious skin reactions are considered rare. Slow titration significantly lowers this risk.

Providers carefully follow dosing guidelines to support medication safety. This is one reason it is important not to adjust the dose without medical guidance.

Can lamotrigine affect sleep or energy?

Dr. Siegfried — Some people may notice changes in sleep or energy when starting lamotrigine.

Possible experiences may include:

• Trouble falling asleep
• Feeling more alert
• Mild fatigue

Sleep changes often improve over time. If sleep difficulties persist, your provider may suggest adjustments.

Can lamotrigine cause mood changes?

Dr. Siegfried — Lamotrigine is intended to support mood stability. However, early adjustments may feel different as the body adapts.

Some people may notice:

• Temporary mood shifts
• Unusual behavior changes
• Suicidal thoughts or behaviors
• Increased anxiety early in treatment
• Emotional changes during dose adjustments

These experiences should be discussed with a provider to ensure appropriate support.

How can side effects be managed?

Dr. Siegfried — Side effect management often involves collaboration with your care team.

Helpful strategies may include:

• Taking medication at the same time daily
• Staying hydrated
• Tracking symptoms and changes
• Attending regular follow-up appointments
• Avoiding sudden dose changes

Never stop or change medication without medical guidance. If you miss several days of lamotrigine, contact your prescriber before restarting because you may need to restart at a lower dose and titrate again.

How long do side effects last?

Dr. Siegfried — Side effects can vary from person to person.

Some people may notice:

• Mild side effects in the first few weeks
• Gradual improvement over time

If side effects continue or feel difficult to manage, it may be helpful to talk with a provider about adjustments.

Does everyone experience side effects?

Dr. Siegfried — No. Some people may have minimal or no side effects.

Response to medication can depend on:

• Individual body chemistry
• Dosage
• Other medications being taken

Because of these differences, treatment is often adjusted over time.

How does lamotrigine fit into a treatment plan?

Dr. Siegfried — Medication is often one part of a broader approach to mental health care.

Many people benefit from combining medication with:

• Therapy
• Lifestyle support (sleep, routine, stress management)
• Structured programs when needed

A personalized, integrated approach can help address both symptoms and long-term goals.

Can I take other medications with lamotrigine?

Dr. Siegfried — It is vital to give your doctor a full list of all medications, supplements and vitamins you take. Some medications can change how lamotrigine works in your body. Your pharmacist and doctor will work together to ensure your medications are compatible.

Why ongoing medication monitoring matters

Dr. Siegfried — Medication management is not a one-time decision. It is an ongoing process that may include:

• Regular check-ins
• Dose adjustments
• Symptom tracking
• Reviewing side effects

This collaborative approach helps ensure treatment remains safe and effective.

When should someone call their provider?

Dr. Siegfried — It may be helpful to contact your provider if you experience:

• Any rash
• Severe dizziness or vision changes
• Persistent nausea or vomiting
• Worsening mood symptoms
• Any symptoms that feel concerning or unusual

Your care team is there to help you stay safe and supported. A provider can help assess what you’re experiencing and adjust care if needed.

Lightfully strives to help empower you for your best mental wellness

At Lightfully, we believe that medication management is most effective when it is part of a whole-person-centered care plan. We don’t just focus on the symptoms; we focus on the person living with them. Our clinical teams are dedicated to providing personalized treatment that honors your unique journey and goals.

We offer a variety of levels of care to ensure you have the support you need as you navigate new treatments. Our mission is empowering people to live stable, meaningful lives by providing evidence-aligned care in a compassionate environment. If you are starting a new medication like lamotrigine, the team at Lightfully is here to provide the expert guidance and clinical monitoring you need to feel safe and supported.

Change is possible. When you’re ready to take the first step, contact us. We’ll take the next steps together, toward the fullest, brightest version of you.

Frequently Asked Questions

Is lamotrigine an antidepressant? 

Technically, it is an anticonvulsant used as a mood stabilizer. While it helps manage depressive episodes in bipolar disorder, it works differently than standard antidepressants like SSRIs.

Why do I have to start lamotrigine at such a low dose? 

Starting at a low dose and slowly increasing (titration) helps reduce the risk of serious skin reactions and allow your body to adjust to the medication.

Is lamotrigine safe long-term?

Many people take it long-term under medical supervision. A provider can help guide this decision.

Can I drink alcohol while taking lamotrigine?

It is generally recommended to limit or avoid alcohol, as it can increase dizziness and sleepiness caused by the medication and may impact mood stability.

Will lamotrigine cause weight gain? 

Clinical studies show that lamotrigine is weight-neutral for most people, meaning it is less likely to cause weight changes compared to many other mood stabilizers.

What should I do if I miss a dose? 

Take the missed dose as soon as you remember, unless it is close to your next dose. If you miss more than three days of medication, contact your doctor before restarting, as you may need to restart at a lower dose for safety.

Can lamotrigine be used for anxiety? 

While not its primary FDA-approved use, some clinicians prescribe it off-label to help manage anxiety symptoms that occur alongside mood disorders.

Does lamotrigine affect birth control? 

Some hormonal contraceptives can lower the amount of lamotrigine in your system and lamotrigine may slightly decrease the effectiveness of some birth control. Always discuss this with your doctor.

Is it safe to take lamotrigine while pregnant? 

Decisions about medication during pregnancy involve a careful balance of risks and benefits. You must have a detailed discussion with your OBGYN and psychiatrist. Don’t abruptly stop taking it.

Can I stop taking lamotrigine if I feel better? 

No. You should never stop a mood stabilizer suddenly. Doing so can cause symptoms to return and risks of seizures in people with epilepsy as well as mood episode recurrence in bipolar disorder. It may also lead to a “rebound” effect. Always taper off under medical supervision.