Abilify (aripiprazole) and Seroquel (quetiapine) are two widely used medications in a class called atypical antipsychotics, also known as second-generation antipsychotics. Both are prescribed for conditions like schizophrenia and bipolar disorder. Aripiprazole and extended-release quetiapine are also FDA-approved as adjunctive treatments for major depressive disorder when used with an antidepressant.
Even so, they work through different mechanisms and tend to cause different side effects, which are often an important factor in choosing between these medications, alongside the condition being treated, previous treatment response, other health conditions, and individual preferences.
Key Takeaways
Different mechanisms: Abilify affects dopamine signaling differently from many other antipsychotics and is sometimes described as a “dopamine stabilizer,” while Seroquel blocks several receptors and has a strong calming, sedating effect.
Side effects usually drive the choice: Seroquel is more sedating and more likely to affect weight and metabolism, while Abilify is more activating and more likely to cause restlessness.
Both treat serious conditions and need monitoring: These medications are used for schizophrenia, bipolar disorder, and as an adjunctive treatment alongside an antidepressant for major depressive disorder, which make regular checkups, including metabolic monitoring, under a prescriber necessary.
What Are Abilify and Seroquel?
Both belong to the same broad family, but they were designed differently, which explains most of their differences.
Abilify (Aripiprazole)
Abilify is the brand name for aripiprazole, an atypical antipsychotic approved by the FDA in 2002 for schizophrenia and in 2004 for the treatment of acute mania in bipolar disorder. It is sometimes described as a dopamine system stabilizer because of its unusual action, which sets it apart from many other antipsychotics. Compared with Seroquel, Abilify is generally less sedating and may be more likely to cause activating effects such as restlessness or insomnia. However, individual responses vary.
Abilify is available as a standard oral tablet, and oral disintegrating tablets and oral solutions are available as generics (aripiprazole). There is also a long-acting injectable form, but it is currently only available under the brand name Abilify Maintena. The injectable form is approved for the treatment of schizophrenia and maintenance treatment of bipolar 1 disorder.
Abilify is approved for use across several conditions, including schizophrenia, bipolar disorder (acute manic or mixed episodes), and as an add-on treatment for depression.
Seroquel (Quetiapine)
Seroquel is the brand name for quetiapine, an atypical antipsychotic approved by the FDA in 1997. It blocks several brain receptors and has a strong effect on histamine, which is a large part of why it is so sedating. It also acts on alpha-1 adrenergic receptors, which may contribute to its sedative and blood-pressure-lowering properties.
Seroquel is available in immediate-release and extended-release formulations. The immediate-release form may be taken in divided doses depending on the condition and treatment plan, while the extended-release form (Seroquel XR) is generally taken once daily. Because of its calming effect, it is sometimes used off-label at low doses for sleep, although major insomnia guidelines caution against this because of limited evidence of benefit and a significant risk of side effects.
Seroquel is approved for the treatment of schizophrenia and acute manic or depressive episodes in bipolar disorder, while Seroquel XR is additionally approved as an adjunct therapy for depression with an antidepressant.
How Do They Work?
The core difference is in how each medication interacts with dopamine, a brain chemical involved in mood, motivation, and psychosis. Abilify reduces dopamine signaling in parts of the brain where dopamine activity is unusually high, while preserving more dopamine activity in pathways where dopamine signaling is normal. Because it only partially activates D2 receptors (a type of receptor that dopamine binds to) rather than completely blocking them, this may help treat schizophrenia while reducing the risk of some side effects associated with stronger dopamine blockade.
Seroquel takes a different approach, blocking dopamine and serotonin receptors while also strongly blocking histamine and other receptors, which produces its sedating and calming effects. These differences in receptor activity contribute to differences in side effects and clinical use, although dose, formulation, diagnosis, and individual response also affect how each medication works for a particular person.
FDA-Approved Uses for Abilify vs. Seroquel
The conditions each medication is officially approved to treat overlap in some places and differ in others. The lists below show where each one has formal FDA approval.
What Abilify is Approved to Treat
Schizophrenia
Bipolar I disorder, including acute manic and mixed episodes
Add-on treatment for major depressive disorder, used together with an antidepressant
Irritability associated with autism spectrum disorder
Tourette syndrome
The FDA prescribing information for Abilify also includes evidence supporting its use for maintenance treatment of bipolar 1 disorder in adults to help delay relapse after stabilization, either alone or in combination with lithium or valproate.
What Seroquel is Approved to Treat
Schizophrenia
Bipolar disorder, including manic episodes, depressive episodes, and maintenance (for maintenance treatment, as an adjunct to lithium or divalproex)
Add-on treatment for major depressive disorder with an antidepressant (Seroquel XR, extended-release form)
Seroquel is notable for having strong evidence in bipolar depression, a phase that can be difficult to treat. Beyond the approved conditions, it is also used off-label for anxiety and insomnia. If depression is your main concern, understanding the types of depression can help you and your provider decide whether an add-on medication makes sense.
Comparing Effectiveness of Abilify vs. Seroquel
Both medications are effective for the conditions they treat, and research suggests that antipsychotics as a class differ more in their side effects than in how well they control symptoms. A large meta-analysis of 32 oral antipsychotics used to treat acute multi-episode schizophrenia found that most agents, including aripiprazole (Abilify) and quetiapine (Seroquel), were more alike in effectiveness than in side effects. However, the relative benefits of aripiprazole and quetiapine can differ depending on the condition being treated.
For schizophrenia and bipolar mania, both can be effective, although their relative benefits and side-effect profiles can differ depending on individual response, symptoms, and treatment goal. For acute bipolar depression, Seroquel has substantial evidence and FDA approval, while Abilify does not. For major depression that has not responded to an antidepressant alone, both Abilify and Seroquel XR are used as add-on options, and the choice usually comes down to side effect profile and individual response.
Side Effects: Key Differences Between Abilify vs. Seroquel
Because these medications act so differently, their side effects diverge in ways that often decide the choice. Two areas are most relevant: sedation and metabolic effects.
Seroquel is more likely than Abilify to cause sedation or sleepiness, which can be helpful when calming or sleep support is needed but a drawback when daytime alertness matters. It is also more likely to cause weight gain and changes in blood sugar and cholesterol, along with dizziness from drops in blood pressure.
Compared to Seroquel, Abilify is generally less sedating, but it is more likely to cause restlessness, an urge to keep moving known as akathisia, and trouble sleeping. It generally has a lower average risk of weight gain and some metabolic effects than Seroquel, but can still cause clinically significant weight or metabolic changes in some people.
Both tend to cause fewer movement-related side effects than older, first-generation antipsychotics. However, Abilify can cause akathisia.
Feature | Abilify (Aripiprazole) | Seroquel (Quetiapine) |
|---|---|---|
Drug class | Atypical antipsychotic (second-generation, though sometimes placed in third-generation due to its distinct pharmacology) | Atypical antipsychotic (second-generation) |
FDA approval | 2002 for schizophrenia; 2004 for bipolar disorder | 1997 for schizophrenia; 2003-2004 for bipolar disorder |
Main action | Dopamine stabilizer | Broad receptor blocker, strong sedation |
Sedation | Generally lower; some people experience sleepiness | Generally higher potential for sleepiness or sedation |
Weight and metabolic risk | Generally lower risk | Generally higher risk |
Restlessness (akathisia) | Relatively more common | Relatively less common |
Use for insomnia | Not typically used | Sometimes used off-label, but insomnia guidelines generally advise against antipsychotics for chronic insomnia alone |
Important Safety Warnings
Both medications share several safety considerations that are important to understand before starting treatment.
Older adults with dementia: Both carry a boxed warning, the FDA’s strongest warning, about an increased risk of death in older adults with dementia-related psychosis. Abilify and Seroquel are not approved for this use.
Metabolic monitoring: Because atypical antipsychotics can affect weight and metabolic health, clinicians generally assess factors such as weight, blood pressure, blood glucose, and lipids before and during treatment. The timing of follow-up monitoring depends on the medication and individual risk factors.
Movement effects: Both can cause a serious long-term movement disorder called tardive dyskinesia, though the risk is lower than with older antipsychotics.
Neuroleptic malignant syndrome: A rare but potentially life-threatening reaction that can involve fever, severe muscle stiffness, changes in mental status, and unstable blood pressure or heart rate. It requires immediate medical attention.
Impulse-control changes: Abilify has been linked in some people to rare, compulsive behaviors, including uncontrollable urges to gamble, binge eat, shop, or engage in sexual activity. New or unusual urges should be reported promptly to a healthcare provider.
Suicidality warning: Abilify, Seroquel, and Seroquel XR all include a boxed warning about increased suicidal thoughts and behaviors in children, adolescents, and young adults taking antidepressants. Your prescriber can explain which warnings apply to your medication, age, and reason for treatment.
Which One Might Be Right for You?
Both Abilify and Seroquel are effective antipsychotic medications. That said, the right fit for you depends on your diagnosis, other medical conditions, medical history, other medications, individual risk of side effects, and which side effects you most want to avoid.
Seroquel may be considered for conditions such as bipolar depression or other approved indications, and its sedating effects may influence the choice when sleep disturbance or agitation is also present.
For someone concerned about sedation or metabolic side effects, Abilify may be one option to discuss with a prescriber, although it has its own potential side effects, including akathisia and restlessness.
If a first medication does not work well or causes side effects that are hard to tolerate, a prescriber may adjust the dose, switch medications, or consider another treatment strategy. These decisions should always be made with a prescriber, and neither medication should be started or stopped on your own.
How Blossom Health Can Help
Decisions about antipsychotic medications are best made with a knowledgeable provider who understands your full history. Blossom Health is a telehealth psychiatry platform that connects you with board-certified, licensed psychiatric providers for virtual, in-network care. Getting started takes three simple steps.
Share your details: Enter your state of residence and your insurance plan so we can match you with the right provider.
Choose a time: Pick an appointment that fits your schedule, often within days.
Meet your provider: Confirm a few details, then meet by video to review your history, symptoms, and goals and build a personalized plan.
If your mental health is holding you back, you do not have to make these decisions alone. You can start with Blossom Health and work with a provider who can help you weigh Abilify, Seroquel, and other treatments for your situation.
Medical Disclaimer
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or medication. If you are experiencing a mental health crisis, contact the 988 Suicide and Crisis Lifeline by calling or texting 988. If you or someone else is in immediate danger, call 911 or go to the nearest emergency department.
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