The widely prescribed drug tamoxifen already plays a major role in reducing the risk of death from breast cancer. But a new study suggests that women should be taking the drug for twice as long as is now customary, a finding that could upend the standard that has been in place for about 15 years.
In the study, patients who continued taking tamoxifen for 10 years were less likely to have the cancer come back or to die from the disease than women who took the drug for only five years, the current standard of care.
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Source: The New York Times