Rexulti (brexpiprazole) is an FDA-approved augmentation medication for major depressive disorder in adults taking antidepressants. Unlike full antipsychotic medications, Rexulti works at lower doses as an adjunctive treatment—meaning it's added to existing antidepressant therapy. For individuals whose depression hasn't fully responded to antidepressants alone, Rexulti offers a well-researched option.
What Is Rexulti?
Rexulti is a partial dopamine agonist (similar to aripiprazole, another augmentation option). It enhances dopamine activity—a neurotransmitter crucial for motivation, pleasure, and mood. Unlike typical antipsychotics that block dopamine, Rexulti modulates it, allowing for efficacy with fewer side effects.
How Does Rexulti Work for Depression?
Depression involves imbalances in dopamine, serotonin, and norepinephrine. When an antidepressant (typically boosting serotonin) alone isn't enough, adding Rexulti enhances dopamine activity. This multi-system approach often produces additional benefit, particularly for motivation, energy, and pleasure—domains where dopamine is particularly important.
When Is Rexulti Prescribed?
Rexulti is used when a patient with major depressive disorder has had partial or inadequate response to an antidepressant. Rather than switching antidepressants or increasing the dose further, adding Rexulti sometimes produces rapid symptom improvement. It's a well-established strategy in treatment-resistant depression.
Starting Rexulti: Dosing
Typical starting dose is 0.5-1 mg daily, often taken with an antidepressant. Doses can be increased to 2-3 mg daily based on response and tolerability. Improvement often appears within 1-2 weeks of starting or increasing dosage—faster than antidepressant monotherapy.
Side Effects and Benefits
Common side effects at low doses are minimal:
- Headache (usually mild and transient)
- Akathisia (restlessness—typically dose-dependent)
- Weight gain (possible but often less than traditional antipsychotics)
- Insomnia or drowsiness
- Sexual side effects (less common than with SSRIs)
Benefits often include rapid mood improvement, enhanced motivation, better sleep quality, and reduced anhedonia (inability to feel pleasure).
Rexulti vs. Other Augmentation Strategies
Augmentation options for treatment-resistant depression include aripiprazole, quetiapine, bupropion, or increasing the antidepressant dose. Rexulti has efficacy comparable to aripiprazole with potentially fewer metabolic side effects. Your psychiatrist will recommend based on your clinical presentation and tolerance profile.
Important Considerations
- Rexulti should not be used if you have a history of neuroleptic malignant syndrome.
- Blood pressure monitoring is recommended, especially early in treatment.
- Regular metabolic monitoring (weight, glucose, lipids) is prudent with any antipsychotic, even at low augmentation doses.
- Inform your prescriber of all medications to avoid interactions.
- Never stop Rexulti abruptly; taper under medical guidance.
Long-Term Management with Rexulti
Many individuals continue Rexulti long-term as maintenance therapy for depression. Once symptoms improve, continuing the medication generally prevents relapse. Duration depends on your clinical course and prescriber recommendation. Your psychiatrist will discuss when tapering might be appropriate.
Medication Management at Next Step Psychiatry
At Next Step Psychiatry in Lilburn, GA, Dr. Aneel Ursani and Fathima Chowdhury, PA-C have extensive experience with Rexulti augmentation. We evaluate whether it's appropriate, optimize dosing, monitor metabolic effects, and adjust your treatment plan to achieve the best outcomes.
Frequently Asked Questions
Is Rexulti an antipsychotic?
Rexulti is technically classified as an antipsychotic, but when used at low augmentation doses for depression, it functions differently than high-dose antipsychotics for psychotic disorders. Side effect profiles differ accordingly.
Will Rexulti help right away?
Many individuals notice improvement within 1-2 weeks of starting Rexulti augmentation—faster than initial antidepressant response. Full benefit may take 4-6 weeks.
Can I take Rexulti with any antidepressant?
Rexulti works with most antidepressants. Your psychiatrist will ensure safe combinations and monitor for drug interactions.
When to See a Psychiatrist
If your depression hasn't fully improved on antidepressant therapy alone, psychiatric evaluation can determine if augmentation with Rexulti would help.
Talk to Next Step Psychiatry
Treatment-resistant depression is treatable. Let's explore medication options tailored to you.
4145 Lawrenceville Hwy STE 100, Lilburn, GA 30047 • 678-437-1659
Disclaimer: This article is for educational purposes and does not replace professional medical advice. Always consult with a licensed psychiatrist before starting, stopping, or changing any medication.