Study: Tamoxifen May Raise Risk Of Aggressive Tumor

08.26.09 | FL News Team

A widely used drug to prevent the reoccurrence of breast cancer has a risk of a hidden and even more deadly side effect.  A study appearing Tuesday in "Cancer Research" questions the drug Tamoxifen, which reduces the spread of estrogen-sensitive cancers.

The study showed that women taking Tamoxifen were four times more likely to develop a non-estrogen-sensitive tumor.  But medical experts question the findings, saying the drug has many more positive benefits than risks.