4-hydroxytamoxifen

Definition / meaning of 4-hydroxytamoxifen

A form of the drug tamoxifen that is made by the body after taking tamoxifen. It can also be made in the laboratory, and may help decrease breast density. A topical form of 4-hydroxytamoxifen is being studied in breast cancer screening.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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