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Breast cancer

Calcium channel blockers not linked to breast cancer risk

Analysis of data on 50,757 women conflicts with previous research that suggested calcium channel blockers increase breast cancer risk

A study published in 2013 showed that women taking calcium channel blockers for at least ten years had a two-fold increased risk of breast cancer[1].

To explore this association prospectively, US researchers analysed data on 50,757 women from a study that has followed the sisters of women with breast cancer since 2003. 

Over a median follow-up of 5.3 years, the risk of developing breast cancer was the same for long-term users of calcium channel blockers and women who did not take them. The rate of long-term calcium channel blocker use was identical (1.3%) among women who did and did not develop cancer. 

Reporting in Breast Cancer Research (online, 5 July 2016)[2], the team says their findings do not support previous reports suggesting an increased breast cancer risk, concerns over which could lead women to receive less effective hypertension treatment.

Citation: The Pharmaceutical Journal DOI: 10.1211/CP.2016.20201470

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