Brexpiprazole (Rexulti) is an atypical antipsychotic medication approved to treat depression (add-on medication) and schizophrenia. Brand name Rexulti can also treat dementia-related agitation from Alzheimer's disease. Brexpiprazole (Rexulti) is taken by mouth, typically once daily. Some of its more common side effects of brexpiprazole (Rexulti) include restlessness, moderate weight gain, and headaches. It's available as a generic medication.
Add-on treatment for depression
Dementia-related agitation from Alzheimer's disease
Brexpiprazole (Rexulti) is an atypical antipsychotic. It treats schizophrenia and depression by balancing chemicals in your brain, such as dopamine and serotonin. This helps to improve your thoughts, mood, and behaviors.
Source: DailyMed
Side effects that you should report to your care team as soon as possible:
Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
Only need to take the medication once a day
Less likely to cause weight gain, high cholesterol, or high blood sugar compared with other similar medications
Less likely to cause movement side effects compared to some other antipsychotics
Can be expensive because it's only available as a brand-name medication
Not recommended for use in pregnancy
Your healthcare provider might need to adjust your dose several times before you find one that works best for you
Carefully monitor your weight while you're taking brexpiprazole (Rexulti). Let your provider know if you notice a lot of weight gain because this might lead to other health problems, such as heart or blood sugar conditions.
Brexpiprazole (Rexulti) can cause unusual, uncontrolled, or repetitive movements of your eyes, tongue, face, arm, or legs. Contact your healthcare provider right away because these might be signs of tardive dyskinesia, which can become permanent.
Brexpiprazole (Rexulti) might make it hard for your body to maintain a normal body temperature. Drink water to stay hydrated, especially if you're out in the sun or exercising. Be careful if you're traveling to a place that is very hot.
If you're starting brexpiprazole (Rexulti) for the first time or if your provider just raised your dose, you might feel dizzy or have a hard time keeping your balance. Make sure to sit up or stand up slowly. This side effect will likely lessen after your body gets used to the medication or the new dose. Talk with your provider if this continues to bother you.
Brexpiprazole (Rexulti) can make you feel drowsy or sleepy. Be careful and avoid activities that require you to be alert, such as driving a car, until you know how this medication affects you.
Make sure to chew your food completely and swallow carefully while taking brexpiprazole (Rexulti). Rarely, this medication can cause the muscles in your throat to not work well and make it hard for you to swallow food.
Brexpiprazole (Rexulti) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Risk factors: Older adults with dementia-related psychosis
Older adults who also have dementia sometimes have some of the symptoms of schizophrenia, like hallucinations and delusions. This is called dementia-related psychosis, and it should not be treated with brexpiprazole (Rexulti). If brexpiprazole (Rexulti) is used for dementia-related psychosis, it can cause death. The cause of death is typically from heart problems, stroke, or infections. Let your provider know if you or your loved one has dementia before starting brexpiprazole (Rexulti).
Risk factors: People age 24 or younger | Taking antidepressants
Taking brexpiprazole (Rexulti) can put you at risk for suicidal thoughts and behavior. Your risk is higher if you're 24 years old or younger, or taking other antidepressants like sertraline (Zoloft) or fluoxetine (Prozac). Look out for worsening depression or any unusual changes in your mood, behavior, thoughts, or feelings, especially during the first few months of treatment or when your dose changes. Talk to your provider if you have any concerns about this side effect.
Risk factors: Older adults | Female and 65 years or older | Higher than recommended doses of brexpiprazole (Rexulti) | Taking brexpiprazole (Rexulti) for a long time
Brexpiprazole (Rexulti) can cause uncontrolled and possibly permanent muscle movements in the tongue, face, mouth, lips, neck, hands, arms, legs, and feet (tardive dyskinesia). To lower your risk of tardive dyskinesia, your provider will prescribe the lowest dose of brexpiprazole (Rexulti) for your symptoms. Get medical help right away if you notice any unusual movements you can't control. This side effect can sometimes occur even after you stop the medication.
Risk factors: Taking antipsychotic medications
Brexpiprazole (Rexulti) can cause neuroleptic malignant syndrome (NMS), which is a rare but serious condition that can lead to death. Be careful using brexpiprazole (Rexulti) if you're also on other medications that might cause NMS. Symptoms include a very high fever, stiff muscles, problems thinking clearly, a very fast or uneven heartbeat, and sweating. Stop taking brexpiprazole (Rexulti) and get medical attention right away if you experience these symptoms.
Risk factors: History of diabetes | History of high cholesterol
Brexpiprazole (Rexulti) can raise your blood sugar levels, sometimes to dangerous levels resulting in coma or death. Let your provider know if you have symptoms of high blood sugar, such as feeling very hungry or thirsty, urinating more often, stomach pain, weakness, or fruity-smelling breath.
Brexpiprazole (Rexulti) can also cause high cholesterol and weight gain. Your provider might check your weight and order blood tests regularly to make sure your blood sugar, cholesterol, and weight are not too high.
Brexpiprazole (Rexulti) can make it difficult for you to think through your actions and control your behavior. It can lead to strong urges for and certain behaviors, such as gambling, eating, shopping, or sex. Because these behaviors can cause harm to yourself or others, your provider might lower your dose or stop the medication. If you or your loved ones notice a change in behavior, let your provider know.
Risk factors: History of low white blood cell counts | Taking other medications that lower white blood cell counts
Brexpiprazole (Rexulti) can lower the amount of white blood cells in your body and put you at higher risk for serious infection. You might need to get lab work done regularly to make sure your white blood cell count is healthy. If the levels are too low, your provider might stop your medication. Talk to your provider right away if you experience symptoms of an infection, including fever, weakness, or sore throat, while taking brexpiprazole (Rexulti).
Risk factors: Starting brexpiprazole (Rexulti) for the first time | Recent rise in brexpiprazole (Rexulti) dose | Older adults | Not enough fluids in your body | History of heart problems | History of low blood pressure | Taking medications that lower blood pressure
Brexpiprazole (Rexulti) can cause sleepiness, dizziness, difficulties keeping your balance, and drops in blood pressure when you sit up or stand too quickly. This can result in fainting and falling. Sit up or stand up slowly, especially during the first few days after you start brexpiprazole (Rexulti) or when your provider raises your dose. Your risk of falls is higher if you have heart problems or if you don't have enough fluids in your body. Talk to your healthcare provider if you continue to experience dizziness while taking brexpiprazole (Rexulti).
Risk factors: History of seizures | Health conditions that raise the risk of seizures | Older adults
Taking brexpiprazole (Rexulti) puts you at higher risk for seizures. Before starting this medication, let your provider know if you have a history of seizures or have a medical condition that puts you at risk of getting seizures.
Generic brexpiprazole is only approved for depression and schizophrenia in adults; brand Rexulti is approved for people ages 13 years and older with these conditions.
Depression: The typical starting dose is 0.5 mg to 1 mg by mouth once a day, as an add-on to other medications. Your provider might raise your dose weekly, if needed. The maximum daily dose is 3 mg.
Schizophrenia: The typical starting dose is 1 mg by mouth once a day. If needed, your provider might raise your dose every few days. The maximum daily dose is 4 mg.
Dementia-related agitation (adults; Rexulti only): The typical starting dose is 0.5 mg by mouth once daily. Your provider will raise your dose weekly, if needed. The typically recommended dose is 3 mg daily. The maximum daily dose is 4 mg.
Your dose might differ if you have kidney or liver problems, are an older adult, or if you take other medications that interact with brexpiprazole (Rexulti).
Add-on treatment for depression
Dementia-related agitation from Alzheimer's disease
Tourette syndrome in children
Depression (add-on treatment)
Irritability associated with autistic disorder in children
Schizophrenia in adults and children age 13 years and older
Bipolar disorder in adults and children age 10 years and older
Add-on to antidepressants for depression (extended-release only)
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Keepers, G. A., et al. (2021). Practice guideline for the treatment of patients with schizophrenia. American Psychiatric Association.
Massachusetts General Hospital Center for Women’s Mental Health. (n.d.). National Pregnancy Registry for Psychiatric Medications.
Otsuka America Pharmaceutical, Inc. (2023). REXULTI- brexpiprazole tablet REXULTI- brexpiprazole kit [package insert]. DailyMed.
U.S. Food and Drug Administration. (2023). FDA approves first drug to treat agitation symptoms associated with dementia due to Alzheimer’s disease.
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