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Does calcium raise blood pressure?
In some areas I read that calcium lowers blood pressure, so why then are calcium channel blockers prescribed for high blood pressure?
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Calcium is required for muscle contraction, including the muscles of the heart and blood vessels. Calcium channel blockers do counter this effect and are used to treat high blood pressure.

Calcium is actually used in certain situations (operating room, emergencies) to temporarily raise blood pressure. It works very well, but only for short periods of time ( minutes). It gives you time to fix the underlying problem. We also give calcium to treat overdose of calcium channel blockers.

To my knowledge, there are not any situations where calcium lowers blood pressure. Don't worry about taking calcium tablets though, your blood levels of calcium in the body are very tightly regulated and so you will not get a large enough rise in calcium levels to effect your blood pressure (unless you get a large dose of IV calcium). As for the extra, some gets absorbed by the bones but most is excreted in the urine.

Sincerely,
Anonymous Joe
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