What is Megace ES?

Megace ES is the brand name for a medicine containing megestrol acetate. Megesterol acetate is a man-made drug similar to the naturally occurring hormone, progesterone. Megace ES is used to treat loss of appetite or to encourage weight gain in certain individuals, including those with acquired immune deficiency syndrome (AIDS). Megace ES is also used in the  treatment of advanced breast cancer and endometrial cancer. It is not entirely known how Megace ES stimulates the appetite or causes weight gain. Megace ES is a liquid suspension which contains more megesterol acetate than the regular Megace suspension. It is taken orally and is only available by prescription. There are no generic versions available in the United States for the ES form of Megace.

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