Selective estrogen receptor modulators (SERMs) are a class of drugs that interact with estrogen receptors in the body. They can either mimic or block the effects of estrogen, depending on the tissue type. This unique ability makes SERMs useful in treating conditions like breast cancer and osteoporosis. SERMs are designed to provide the benefits of estrogen, such as bone protection, while minimizing risks like breast cancer growth. Common examples of SERMs include tamoxifen and raloxifene, which are prescribed for specific medical conditions to help manage estrogen-related effects effectively.