Tamoxifen can bring quite a few changes to how the body feels and functions. Here's a breakdown of what many people experience:
Common side effects
- Hot flashes and night sweats
- Vaginal dryness, discharge, or irritation
- Irregular periods or changes in flow
- Mood swings, anxiety, or low mood
- Fatigue (even after rest) Show Full Answer
Tamoxifen can bring quite a few changes to how the body feels and functions. Here's a breakdown of what many people experience:
Common side effects:
- Hot flashes and night sweats
- Vaginal dryness, discharge, or irritation
- Irregular periods or changes in flow
- Mood swings, anxiety, or low mood
- Fatigue (even after rest)
- Weight gain or fluid retention
- Headaches and nausea
- Sleep difficulties Less common changes to be aware of:
- Memory or concentration issues (sometimes called "brain fog")
- Skin changes
- Joint pain or muscle cramps
- Changes in sex drive or intimacy comfort Serious but rare risks to watch for — contact a doctor right away if experiencing:
- Sudden leg swelling or calf pain (possible blood clot)
- Chest pain or shortness of breath
- Unusual vaginal bleeding Many MyBCTeam members have shared that weight changes, especially around the belly, can be frustrating — even when staying active. Research on tamoxifen and weight gain is mixed, but factors like menopause and post-treatment recovery can also play a role.
The good news is most side effects can be managed with support from a care team. Always report new or worsening symptoms, especially anything that feels unusual or affects daily life.
October 3
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