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Can I take Abilify and Fluoxetine together?

Drug interaction guide

Taking fluoxetine with Abilify (aripiprazole) can significantly increase the amount of Abilify in your bloodstream. This makes you much more likely to experience side effects such as extreme sleepiness, restlessness (feeling like you cannot sit still), uncontrollable body movements (tremors or twitching), and dizziness. There is also a small but serious risk of a heart rhythm problem called QT prolongation.

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Why this happens

Fluoxetine blocks a specific enzyme in your liver (called CYP2D6) that your body uses to break down and remove Abilify. Because the 'clean-up' process is slowed down, the Abilify builds up to higher levels than intended.

You must speak to your doctor before taking these together. Your doctor will likely need to prescribe a much lower dose of Abilify (often half the usual dose) if you are also taking fluoxetine. If you are already taking both, do not stop suddenly, but contact your doctor if you feel unusually drowsy, dizzy, or notice any strange muscle movements.

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Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.

Article history

The information on this page is written and peer reviewed by qualified clinicians.

  • 14 Mar 2026 | Originally published
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