Home » Uncategorized » Tamoxifen Reported to Cause Aggressive Cancer Tumors

A study indicates that tamoxifen, a cancer drug, may cause secondary tumors. Tamoxifen is commonly prescribed to breast cancer patients and is sucessful to some extent in controling cancer.

Tumors that develop due to use of tamoxifen are very rare but are highly aggressive. Tamoxifen blocks estrogen which stimulates cancer growth. However in most cases, Tamoxifen is very effective in preventing breast cancer recurrence.

This report on tamoxifen is based on observations at the Fred Hutchinson Cancer Research Cancer in Seattle, WA.

In the report, the author Dr. Li states that usage of tamoxifen increases the risk of cancerous tumor formation in the opposite breast by as much as four times.

Tamoxifen was discovered by ICI Pharmaceuticals (now AstraZeneca) and is sold under the trade names Nolvadex, Istubal, and Valodex.

Since its approval in 1998, tamoxifen has been used to treat millions of women and men diagnosed with hormone-receptor-positive breast cancer.


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