Yes, menstrual changes on Tamoxifen are very common, and you're definitely not alone in this experience. Tamoxifen can affect periods in many different ways — some people get heavier or more painful periods, while others find their periods become lighter, irregular, or stop altogether (called amenorrhea).
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Yes, menstrual changes on Tamoxifen are very common, and you're definitely not alone in this experience. Tamoxifen can affect periods in many different ways — some people get heavier or more painful periods, while others find their periods become lighter, irregular, or stop altogether (called amenorrhea).
One MyBCTeam member shared: "My periods stopped as soon as I started taking tamoxifen. I was told to expect this." Even without a period, some cramping can still occur. However, it's always worth mentioning any new or unusual symptoms to your oncologist, especially:
- Cramping that feels severe or different than usual
- Any unexpected vaginal bleeding or spotting
- Discharge that looks unusual
These could sometimes point to changes in the uterus, like polyps or fibroids, which Tamoxifen can occasionally contribute to. The good news is that period absence on Tamoxifen is very common and often temporary. Once treatment ends, periods typically return — unless natural menopause has occurred in the meantime.
Keeping a note of your symptoms to share at your next appointment is a great way to stay on top of things. 📋
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Tamoxifen and Heavy Periods: 7 Facts To Know
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