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    Information about Diltiazem

    Diltiazem uses

    How diltiazem works

    Diltiazem is a calcium channel blocker. It blocks the action of calcium on the heart and blood vessels, thereby widening the blood vessels and allowing more blood and oxygen to reach the heart. This reduces blood pressure and decreases the chances of angina (chest pain).

    Common side effects of diltiazem

    Headache, Nausea, Fatigue, Dizziness, Feeling of discomfort, Dyspepsia, Stomach pain, Peripheral edema, Constipation, Redness of skin, Flushing (sense of warmth in the face, ears, neck and trunk), Slow heart rate, Palpitations
    Content Details
    Written By
    Dr. Betina Chandolia
    MDS, BDS
    Reviewed By
    Dr. Ashish Ranjan
    MD (Pharmacology), MBBS
    Last updated on:
    06 Nov 2019 | 02:49 PM (IST)
    Want to know more?
    Read Our Editorial Policy

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    Expert advice for Diltiazem

    • Diltiazem slows down the heartbeat and allows the blood vessels in the body to relax.
    • This helps prevent angina attacks (chest pain caused by heart disease), certain abnormal heart rhythms, stroke and heart attack.
    • It may cause dizziness or sleepiness. Do not drive or do anything requiring concentration until you know how it affects you.
    • It may cause you to feel lightheaded or weak especially when you stand up (orthostatic hypotension). Rise slowly if you have been sitting or lying down. 
    • It is best to avoid drinking alcohol while taking Diltiazem as it may make the side effects worse.
    • Do not stop taking it suddenly without talking to your doctor first.

    Frequently asked questions for Diltiazem


    Q. Can I stop taking Diltiazem if I feel well?

    No, keep using Diltiazem as advised by your doctor, even if you feel well. Stopping Diltiazem suddenly may lead to serious complications due to very high blood pressure.

    Content on this page was last updated on 06 November, 2019, by Dr. Varun Gupta (MD Pharmacology)