noun[mass noun] Medicine
A synthetic drug used to treat breast cancer and infertility in women. It acts as an oestrogen antagonist.
- The risk is small compared to the benefits of using tamoxifen to treat breast cancer.
- The question of how long patients should continue taking the drug is important because tamoxifen is not problem free.
- Patients managed as outpatients (such as those treated with tamoxifen only) were likely to be missed.
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