Can I take Quetiamine and Sertraline together?
Drug interaction guide
Originally published 25 Jan 2026
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Taking quetiapine and sertraline together can increase the risk of a rare but serious heart rhythm problem called QT prolongation. It may also increase the risk of 'serotonin syndrome', a condition where levels of the chemical serotonin in the brain become too high. Additionally, both medications can cause drowsiness, which may be more intense when they are taken together.
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Why this happens
Both drugs can affect the electrical activity of the heart (the QT interval). When combined, this effect can be additive. Furthermore, both drugs influence serotonin levels; sertraline increases serotonin, and quetiapine can also affect serotonin receptors, potentially leading to an over-accumulation. Both drugs also have sedative properties that add together.
What you should do
Back to contentsYou should speak to your doctor before taking these together. They may want to perform a simple heart trace (ECG) to check your heart rhythm. Seek medical help immediately if you feel dizzy, faint, or experience a fast or pounding heartbeat. Also, watch out for signs of serotonin syndrome, such as shivering, sweating, confusion, or muscle stiffness. Avoid driving or using heavy machinery until you know how this combination affects your alertness.
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Using other medicines
Back to contentsTaking 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.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
25 Jan 2026 | Originally published

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