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Can I take 1.5mg and Azithromycin together?

Drug interaction guide

Taking these two medicines together can increase the risk of a serious heart rhythm problem. This can cause symptoms like a fast or irregular heartbeat, severe dizziness, or fainting. While the risk is generally low for most people, it is important to be aware of these symptoms.

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Why this happens

Both medicines have the potential to affect the electrical activity of the heart (specifically, they can 'prolong the QT interval'). When used together, this effect can be added together, making a heart rhythm disturbance more likely.

You should speak to your doctor before taking these together. They will check if you have any existing heart conditions or mineral imbalances (like low potassium) that might make this combination riskier. If you do take them together and feel your heart racing, feel faint, or have a sudden dizzy spell, seek medical help immediately.

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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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