List of products in the National Drug Code with proprietary name . This medication is used to treat painful sexual intercourse and vaginal dryness in women after menopause. Painful intercourse and vaginal dryness are symptoms of changes in and around your vagina, due to menopause. This drug is different from hormones (including estrogens and progestins). It works by acting like estrogen in some parts of the body. Ospemifene belongs to a class of drugs known as selective estrogen receptor modulators (SERM).