Some women report some side effects. Many do not. Tamoxifen's side effects are similar to the symptoms of menopause. But tamoxifen does not cause menopause. However, women who are close to menopause may enter it early because of the drug.
Women also report other side effects which are less common.
However, they have not been fully linked to tamoxifen. Women with bone metastatic breast cancer may experience additional pain when on tamoxifen. This is usually temporary. It is often considered a good sign since it may mean the cancer is responding to the tamoxifen. If you have any side effects, speak to your doctor or nurse.