Can I take Biotin and Isosorbide mononitrate/carmil/monomil together?
Drug interaction guide
Originally published 25 Jan 2026
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There is no known interaction between biotin and isosorbide mononitrate (also known by brand names like Carmil or Monomil). Biotin is a B-vitamin, and isosorbide mononitrate is a nitrate medication used to prevent chest pain (angina). They work in completely different ways in the body and do not interfere with each other's absorption or effectiveness.
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Why this happens
Biotin is a water-soluble vitamin processed by the body's normal metabolic pathways. Isosorbide mononitrate works by relaxing blood vessels. These two substances do not share the same metabolic pathways in the liver, nor do they compete for the same receptors in the body.
What you should do
Back to contentsYou can safely take biotin and isosorbide mononitrate together. However, you should always inform your doctor or pharmacist about all supplements you are taking. Note: High doses of biotin can sometimes interfere with certain laboratory blood tests (such as thyroid or heart enzyme tests); if you are having blood work done, tell the nurse or doctor that you take a biotin supplement.
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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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