Your Side Effects May IncludeTamoxifen (Soltamox) side effects
This side effect is printed on the FDA label for Tamoxifen. It was a question in our daily quiz, where you pick the real side effect from four choices.
Cancer of the uterus
A drug that fights breast cancer carries a boxed warning for cancer of the uterus.
From the FDA label
“Some of the uterine malignancies (endometrial carcinoma or uterine sarcoma) have been fatal.”
Tamoxifen label, updated Apr 30, 2026 ·
Read the full label on DailyMed
What to watch for
Report unusual vaginal bleeding, or pain or pressure in your pelvis, right away.
74 reports to the FDA's adverse event system mention uterine or endometrial cancer. A report is not proof the drug caused it. See the query
From quiz No. 6 · September 30, 2026 · Play that quiz →
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Not medical advice. Don't stop or start a medication because of a quiz. Talk to your doctor or pharmacist. Label text and report counts from openFDA. Not affiliated with any drug maker.