Megestrol acetate

DB00351ApprovedInvestigationalVet approvedSmall moleculeProgestins

Megestrol acetate is a progestin that is administered orally to treat anorexia and cachexia or serious unexplained weight loss and is also used as an antineoplastic agent to treat certain types of malignancy. 17-Hydroxy-6-methylpregna-3,6-diene-3,20-dione.

Chemical structure of Megestrol acetate
Mechanism
Curator reviewed
Primary indication
For the treatment of anorexia, cachexia, or an unexplained, significant weight loss in patients with a diagnosis of acquired immunodeficiency syndrome (AIDS).Curator reviewed · 10 structured indications
Formula / weight
C24H32O4 · 384.516 g/mol (avg)
First approval
Canada, 1995 · United States, 1988
Also known as
17-Hydroxy-6-methylpregna-4,6-diene-3,20-dione acetate · 17.alpha.-Acetoxy-6-methylpregna-4,6-diene-3,20-dione · 6-Dehydro-6-methyl-17.alpha.-acetoxyprogesterone · 6-Methyl-6-dehydro-17.alpha.-acetoxyprogesterone
Code names
BDH-1298 · NSC-71423 · SC-10363
Brand names
  • Megace

Resolves to

Structure
InChIKeyRQZAXGRLVPAYTJ-GQFGMJRRSA-NSMILES[H][C@@]12CC[C@](OC(C)=O)(C(C)=O)[C@@]1(C)CC[C@@]1([H])[C@@]2([H])C=C(C)C2=CC(=O)CC[C@]12C
Transporters

What you can answer from here — as of September 23, 2026

2Protein targetsEach mapped to UniProt, with action and pharmacological action
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1TransporterSubstrate / inhibitor direction, not just membership
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1,280Drug interactionsStructured to mechanism, not free text
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111Clinical trialsPhase, status and sponsor resolved per trial
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10Structured indicationsCondition, population, route and combination as fields, not prose
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2ContraindicationsEach with its own population and attribute set
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123Marketed productsAcross 8 countries and 65 labellers
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25+ReferencesStructured and connected to the statements they support
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