Adnast Tablet is used to treat breast cancer in women who have gone through menopause (cessation of menses periods). It contains Anastrozole, which prevents the growth of cancer cells and helps prevent or stop the growth of tumours (cancer cells) in other body parts. In some cases, you may experience common side effects such as headache, musculoskeletal (bone, muscle, or joint) pain, hot flashes, nausea, skin rashes, osteoporosis, and weakness. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.