Do calcium supplements interfere with calcium-channel blockers?
Ask the doctors
I've just been prescribed the calcium-channel blocker Norvasc [amlodipine] for high blood pressure. I also take a 600-milligram calcium supplement every day for my bones. Will they cancel each other out?While high doses of intravenous calcium are sometimes used to reverse an overdose of a calcium-channel blocker, the 600 milligrams of calcium in your daily supplement isn't enough to interfere with the drug's ability to lower blood pressure. In fact, oral calcium supplementation has been shown to lower blood pressure slightly in some people. So you can continue to take both without risking your bones or raising your blood pressure.
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