brexpiprazole vs paroxetine
According to this portal's Publishing Organization, this page was last reviewed in August 2026 against our methodology. Figures and extracts on this site, including tables above 1,000 rows when the corpus is that large, are the publisher's responsibility.
Side-by-side comparison of brexpiprazole and paroxetine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
7 DRUG INTERACTIONS Factors Dosage Adjustments for REXULTI ( 2.7 ) Strong CYP2D6 REXULTI may be administered without dosage adjustment in patients with MDD when administered with strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine). Strong CYP2D6 Inhibitors In the clinical studies examining the adjunctive use of REXULTI in the treatment of MDD, dosage was not adjusted for strong CYP2D6 inhibitors (e.g., paroxetine, fluoxetine).
Rexulti
Paxil
Rexulti is a medication used to treat certain mental health conditions. It can help with depression, schizophrenia, and agitation related to Alzheimer's disease.
Paroxetine (Paxil) is a medicine that can help treat depression and anxiety disorders. It belongs to a class of drugs called selective serotonin reuptake inhibitors (SSRIs).
Rexulti can be used with antidepressants to treat major depressive disorder in adults. It can also treat schizophrenia in adults and children 13 years and older. Additionally, Rexulti can help manage agitation in people with dementia due to Alzheimer's disease. Rexulti should not be used as needed for agitation related to dementia.
Paroxetine is used to treat several conditions in adults. These include major depressive disorder (MDD), obsessive compulsive disorder (OCD), panic disorder (PD), social anxiety disorder (SAD), generalized anxiety disorder (GAD), and posttraumatic stress disorder (PTSD). It helps to improve mood and reduce anxiety and panic feelings.
Rexulti affects the balance of certain natural chemicals in the brain. These chemicals, called neurotransmitters, include dopamine and serotonin. By affecting these chemicals, Rexulti can help improve mood, thinking, and behavior.
Paroxetine works by increasing the amount of serotonin in your brain. Serotonin is a natural substance that helps regulate mood. By increasing serotonin levels, paroxetine can help improve symptoms of depression and anxiety.
- • Weight gain
- • Feeling sleepy
- • Restlessness or feeling like you need to move
- • Abnormal ejaculation
- • Weakness or fatigue
- • Constipation
- • Decreased appetite
- • Diarrhea
- Weight Increased 1,673
- Akathisia 854
- Tremor 630
- Anxiety 591
- Tardive Dyskinesia 590
- Drug Interaction 1,825
- Fatigue 1,821
- Nausea 1,738
- Toxicity To Various Agents 1,579
- Anxiety 1,476
Elderly patients with dementia-related psychosis who are treated with antipsychotic drugs have an increased risk of death. Rexulti is not approved to treat dementia-related psychosis unless it is related to agitation from Alzheimer's disease. Antidepressants may increase the risk of suicidal thoughts and behaviors in young adults and children. Tell your doctor right away if you have thoughts of harming yourself.
Antidepressants may increase the risk of suicidal thoughts and behaviors in young adults. Your doctor will monitor you closely for worsening depression or suicidal thoughts. Paroxetine is not approved for use in children.
Tell your doctor if you are pregnant or plan to become pregnant. Babies born to mothers who take Rexulti in the last 3 months of pregnancy may have withdrawal symptoms or other problems after birth. There is a pregnancy registry to monitor outcomes in women exposed to Rexulti during pregnancy. You can contact the registry at 1-866-961-2388.
Paroxetine may cause harm to your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. Taking paroxetine later in pregnancy may cause problems for the newborn.
Also Compare, Nearby Drugs
Compare brexpiprazole with
Compare paroxetine with
How to Read This brexpiprazole vs paroxetine Comparison
brexpiprazole is classified in the Atypical Antipsychotic drug class, while paroxetine sits within the Selective Serotonin Reuptake Inhibitor (SSRI) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, brexpiprazole has 4,338 submissions while paroxetine has 8,439. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to paroxetine blocks the liver enzyme that breaks down brexpiprazole, which can lead to higher levels of the drug in your body.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for brexpiprazole or paroxetine.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.