Chemical structure of Megestrol

Megestrol is a medication used as a tablet to slow the progress of breast cancer as a last resort after it has spread to other organs.

It is not to be used in pregnancy and women must use adequate contraception while taking megestrol. Regular blood tests to check the blood sugar level are recommended.

Side effects may include nausea, weight gain, fluid retention, abnormal vaginal bleeding, and less commonly vomiting, tumour pain, bone pain, hot flushes and a blood clot in a vein (thrombosis).

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