Brexpiprazole
Generic: brexpiprazole · Brand: Rexulti® · Class: 2nd Gen Antipsychotic / Partial D2 Agonist
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How It Works
Brexpiprazole is a second-generation antipsychotic and serotonin-dopamine activity modulator (SDAM) — closely related to aripiprazole. Like aripiprazole, it is a partial dopamine agonist (stabilizer) rather than a full blocker, and also partially activates serotonin receptors. This unique profile provides antipsychotic and antidepressant effects with generally fewer side effects than older antipsychotics. It is FDA-approved for schizophrenia, as an adjunct for major depression, and most recently for agitation associated with Alzheimer's dementia.
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What It Treats
SchizophreniaFDA-approved for adults
Major Depression AugmentationFDA-approved as add-on when antidepressants are not fully effective
Agitation in Alzheimer's DementiaFDA-approved — one of the first medications approved for this indication
PTSDUsed off-label with emerging evidence
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Dosing Overview
| Population | Start | Typical Range | Max |
|---|---|---|---|
| Adults Schizophrenia | 1 mg | 2–4 mg | 4 mg |
| Adults MDD Augmentation | 0.5–1 mg | 1–3 mg | 3 mg |
| Adults Alzheimer's Agitation | 0.5 mg | 1–3 mg | 3 mg |
Taken once daily with or without food. Start low and titrate slowly. CYP2D6 and CYP3A4 status may affect dosing — your provider may adjust based on other medications.
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Side Effects
Common
- Weight gain
- Akathisia (restlessness)
- Headache
- Drowsiness
- Increased appetite
- Dizziness
- Constipation
- Anxiety
Call us if you notice
- Tardive dyskinesia (involuntary movements)
- Neuroleptic malignant syndrome (NMS)
- Significant weight gain or metabolic changes
- High blood sugar or new diabetes
- Severe restlessness (akathisia)
- Muscle stiffness or rigidity
Brexpiprazole is generally well tolerated with a lower risk of movement side effects than many antipsychotics. Weight gain and akathisia are the most common concerns. Used at lower doses when added to antidepressants.
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Tips for Success
Same Time DailyTake at the same time each day for consistent levels in your system.
With FoodTaking with food reduces nausea and stomach upset.
Don't Stop AbruptlyAlways taper with your provider guidance — stopping suddenly can cause rebound symptoms.
Avoid AlcoholAlcohol increases sedation and side effects significantly.
Tell All ProvidersLet other prescribers know what you are taking — interactions matter.
Track Your MoodNote any changes in mood, movement, or weight and share with your provider.
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Important Safety Information
Tardive Dyskinesia: Long-term use of antipsychotics can cause involuntary repetitive movements of the face, tongue, or limbs. Report any unusual movements to your provider immediately.
Elderly Patients with Dementia: Antipsychotics carry a black box warning for increased risk of death in elderly patients with dementia-related psychosis. These medications are not approved for this use.
Metabolic Effects: Many antipsychotics can cause weight gain, elevated blood sugar, and increased cholesterol. Your provider will monitor these regularly.
Pregnancy & Breastfeeding: Discuss risks and benefits with your provider. Do not stop without consultation.
Drug Interactions: Antipsychotics interact with many medications including other CNS depressants, blood pressure medications, and QT-prolonging drugs. Always share your full medication list.
Impulse Control: As with aripiprazole, rare cases of compulsive behaviors (gambling, eating, shopping, sexual) have been reported. Contact your provider immediately if you notice new compulsive urges.
Questions? I am here.
Reach me between appointments if you have concerns about side effects, notice mood changes, or have questions about your medication.
360-389-3712
info@rootedmindspsychiatry.com