Consult with your health care provider before using vitamin D under the following situations:
- If you’re taking certain other medicines: digoxin for an irregular heartbeat (atrial fibrillation) or thiazide diuretics such as hydrochlorothiazide or bendroflumethiazide (commonly used to treat high blood pressure). In this situation, don’t take high doses of vitamin D. You should also have your digoxin level monitored more closely if you’re taking vitamin D.
- If you have one of these medical conditions: primary hyperparathyroidism, Hodgkin’s or non-Hodgkin’s lymphoma, a granulomatous disease, kidney stones, some types of kidney disease, liver disease or hormonal disease, you should get advice from a specialist. See our Hypersensitivity page for more information.
- Don’t take vitamin D if you have high blood calcium levels, unless under the care of your physician.
- You may need more than the usual dose of vitamin D if you’re taking certain medicines which interfere with vitamin D. These include: carbamazepine, phenytoin, primidone, barbiturates and some medicines used for the treatment of HIV infection.
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