- With Mayo Clinic emeritus hypertension specialist
Sheldon G. Sheps, M.D.
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Sheldon G. Sheps, M.D.
Sheldon G. Sheps, M.D.
Dr. Sheldon Sheps, emeritus professor of medicine and former chair of the Hypertension Division in the Department of Medicine at Mayo Clinic, has been with Mayo Clinic since 1960.
Dr. Sheps, a Winnipeg, Manitoba, native, is board certified in internal medicine and specializes in hypertension and peripheral vascular diseases. He developed a multidisciplinary approach with specially trained nurses, dietitians, technicians and educators to help form a team approach to the treatment of patients with abnormal blood pressure.
"I have always believed in involving the patient and family in their health care," he says. "I have asked for their understanding of the illness and issues and for participation in decisions. The Web is a natural extension of that, and now many more people can be informed."
Dr. Sheps chaired the sixth working group, and participated in the fourth, fifth and seventh groups, that developed the then-latest guidelines for hypertension under the auspices of the National Heart, Lung and Blood Institute (NHLBI). He helped write the latest American Heart Association (AHA) report on blood pressure measurement. He chaired an AHA group that produced an online accreditation for blood pressure measurement for health professionals. He has co-authored books, newsletters, CD-ROMs and other Mayo Clinic health information material and joined Mayo Clinic's Web team in 1998. He was medical editor-in-chief of both editions of the "Mayo Clinic on High Blood Pressure" book; the last edition was published in 2003. He was also medical editor-in-chief of "Mayo Clinic 5 Steps to Controlling High Blood Pressure,'' published in 2008.
He was section editor for each of the first three editions of "Hypertension Primer" for the American Heart Association.
Dr. Sheps was also chairman of the Science Base Subcommittee, National High Blood Pressure Education Program, and was a consultant to the Hypertension Initiative of the World Health Organization. In 1997, he was honored with the Individual Achievement Award on the 25th anniversary of the National High Blood Pressure Education Program of NHLBI. In 2009, he was honored as a Distinguished Mayo Alumnus.
Definition (3)
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Risk factors (2)
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Symptoms (1)
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Causes (5)
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Complications (1)
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Treatments and drugs (5)
- Calcium supplements: Do they interfere with blood pressure drugs?
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- see all in Treatments and drugs
Lifestyle and home remedies (9)
- Resperate: Can it help reduce blood pressure?
- Blood pressure medication: Still necessary if I lose weight?
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- see all in Lifestyle and home remedies
Alternative medicine (1)
- L-arginine: Does it lower blood pressure?
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Question
Calcium supplements: Do they interfere with blood pressure drugs?
Is it true that calcium supplements may interfere with blood pressure medications?
Answer
from Sheldon G. Sheps, M.D.
Yes. In large amounts, calcium supplements may interfere with some blood pressure medications. Interactions may occur with the following blood pressure medications:
- Thiazide diuretics. Ingesting large amounts of calcium with thiazide diuretics — such as chlorothiazide, hydrochlorothiazide and indapamide — can result in milk-alkali syndrome, a serious condition characterized by excessively high levels of calcium and a shift in the body's acid-base balance to alkaline. In general, avoid consuming more than 1,500 milligrams of calcium (supplements and food sources combined) a day if you're taking a thiazide diuretic. If you do take calcium supplements while taking a thiazide diuretic, talk to your doctor about the appropriate dose and have your blood pressure and calcium levels monitored.
- Calcium channel blockers. When taken intravenously, calcium may decrease the effects of calcium channel blockers such as nifedipine, verapamil, diltiazem and others. In fact, intravenous calcium is used to help reverse calcium channel blocker overdose. However, there's no evidence that standard calcium supplements interfere with calcium channel blockers. To be safe, check your blood pressure regularly if taking calcium channel blockers and calcium supplements concurrently.
Calcium supplements don't appear to interact with other commonly prescribed blood pressure medications, such as beta blockers, angiotensin-converting enzyme (ACE) inhibitors, angiotensin II receptor blockers or renin inhibitors. Talk to your doctor if you take high blood pressure medications and calcium supplements and are concerned about interactions.
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