Fulvestrant Injection Prefilled Syringes 50 mg per 5 mL (2-Pack)Fulvestrant, marketed under the brand name Faslodex, is an injectable hormonal therapy used to treat hormone receptor positive (HR+) breast cancer in postmenopausal women. It works by blocking and breaking down estrogen receptors on cancer cells, helping to slow or halt the growth of tumors that depend on estrogen. Fulvestrant Injection Prefilled Syringes are used to treat certain types of hormone receptor positive breast cancer in postmenopausal