Can I take Cinnarizine dimenhydrinate and Quinine together?
Drug interaction guide
Originally published 14 Mar 2026
Meets Patient’s editorial guidelines
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Taking these medicines together can increase the risk of serious heart rhythm problems and may worsen side effects like drowsiness, blurred vision, and a dry mouth.
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Why this happens
Both medicines can affect the electrical activity of the heart (prolonging the QT interval). Additionally, both have 'anticholinergic' effects, meaning they block certain nerve signals, leading to increased side effects.
What you should do
Back to contentsYou should speak to your doctor before taking these medicines together. They may want to check your heart health (ECG) or suggest an alternative treatment. Seek medical help immediately if you feel dizzy, faint, or notice a fluttering in your chest.
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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.
14 Mar 2026 | Originally published

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