Taking calcium-channel blockers (CCBs) for high blood pressure may have some risks. Some research has shown that taking CCBs at the same time as the antibiotic clarithromycin (Biaxin) is associated with a small risk of kidney injury. Other research finds that women who take CCBs for 10 years or more have more than double the odds of getting breast cancer. People who are concerned should talk to their doctor to determine if the risks of CCBs outweigh the benefits.
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