What is megestrol acetate used for?
Megestrol acetate is a progestin (a synthetic form of the hormone progesterone). It’s used to treat certain conditions where a hormone effect is helpful.
Appetite and weight loss (common use)
One of the best-known uses of megestrol acetate is to help increase appetite and promote weight gain in people with significant unintended weight loss, including weight loss associated with serious illness.
Hormone-related problems (gynecologic uses)
Megestrol acetate has been used for hormone-responsive gynecologic conditions, since it can affect uterine and endometrial tissue through its progestin activity.
How it works (why it can help)
Because it acts like progesterone, megestrol acetate can change hormone signaling in the body. That hormonal action is what links it to appetite/weight effects and to hormone-dependent conditions.
Important safety considerations patients ask about
Megestrol acetate is associated with risks that clinicians monitor closely, including blood clot (thrombosis) risk and effects on blood sugar in some patients. It can also cause fluid retention, which is part of why dosing and follow-up matter.
Need a specific “use” based on the condition?
Uses can differ by country, formulation, and who the patient is (for example, cancer-related cachexia versus gynecologic indications). Tell me the condition you’re asking about (or the label wording you saw), and I can match the use more precisely.