Long-term use of calcium channel blockers linked to increased breast cancer risk. |
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JAMA Internal Medicine: The study's key finding was that women currently taking calcium-channel blockers who have used them for 10 years or longer had an approximately two and a half times higher risk of both invasive ductal and invasive lobular cancers compared to those who never used such calcium-channel blockers and compared to users of other forms of antihypertensives. In contrast, the study found that use of other classes of antihypertensive drugs, including diuretics, beta blockers and angiotensin-receptor blockers, were not associated with an increased risk of breast cancer, even when used long term.
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