In one study (abstract 1569), the first to examine the effect of metformin on survival rates for breast cancer patients, researchers examined clinical outcomes for 1,215 patients who were diagnosed and underwent surgical treatment for breast cancer between 1997 and 2013. 97 patients examined reported using metformin before their diagnosis, and 97 reported use of the drug after diagnosis.
Results of the study showed that patients who used metformin before being diagnosed with breast cancer were more than 2X likely to die than patients who never used the drug, while patients who began using metformin after their cancer diagnosis were almost 50% more likely to survive than non-users.
“While use of the drug may have a survival benefit for some breast cancer patients, those who develo...
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