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Can I take Adizem and Telmisartan together?

Drug interaction guide

Taking Adizem (diltiazem) and telmisartan together can cause your blood pressure to drop lower than intended. This may make you feel dizzy, lightheaded, or faint, especially when standing up quickly. In some cases, it can also lead to a slower heart rate or swelling in the ankles.

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Why this happens

Both medicines work to lower blood pressure but in different ways. Adizem relaxes blood vessels and slows the heart rate, while telmisartan relaxes blood vessels by blocking a specific hormone. When used together, their effects add up (an additive effect), which can sometimes lower blood pressure too much.

You can take these medicines together, but you should be monitored by your doctor. It is a good idea to check your blood pressure regularly at home. If you feel very dizzy, tired, or notice your heart beating very slowly, contact your GP. To avoid dizziness, try to stand up slowly from a sitting or lying position.

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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.

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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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