Tamoxifen is a medication used to treat a specific form of breast cancer. It works by inhibiting the effects of estrogen, a hormone that can cause cancer cells to develop. Tamoxifen is very beneficial for breast cancers that form in response to estrogen. Tamoxifen prevents the cancer from returning or spreading to other places of the body. It acts as a barrier against the estrogen that promotes cancer. Tamoxifen is frequently prescribed by doctors following surgery to provide further protection. It's a crucial aspect of the strategy to prevent cancer from returning, providing hope and protection to patients undergoing breast cancer treatment.