Your doctor believes that tamoxifen is the best treatment for you.
Tamoxifen works against breast cancer at all stages of the illness.
It can prevent breast cancer returning after initial treatment, such as an operation, or it can control breast cancer which has spread to other parts of the body. Occasionally tamoxifen may cause indigestion or nausea. This may be relieved by talking your tablet with food or at a different time, such as before you go to bed. Some women have said they put on weight while taking tamoxifen and this is probably due to the drug. Women may also gain weight during cancer treatment due to changes in their lifestyle, such as a change in diet or a reduction in exercise.