Fulvestrant is used in the treatment of breast cancer.
Fulvestrant works by blocking the action of estrogen on breast cancer cells. This mechanism can reduce or halt the growth of certain breast cancer cells that depend on estrogen for their growth.
Common side effects of Fulvestrant include nausea, vomiting, back pain, fatigue, hot flashes, decreased appetite, constipation, bone pain, joint pain, cough, injection site pain, headache, pain in extremities, musculoskeletal pain (bone, muscle, or joint), breathlessness, increased alanine aminotransferase, increased aspartate aminotransferase, and weakness.