Last update 22 Sep 2026

Megestrol Acetate

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
17-Acetoxy-6-methylpregna-4,6-diene-3,20-dione, 17-Hydroxy-6-methylpregna-4,6-diene-3,20-dione 17-acetate, 17alpha-Acetoxy-6-dehydro-6-methylprogesterone
+ [37]
Target
Action
agonists
Mechanism
PR agonists(Progesterone receptor agonists)
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Structure/Sequence

Molecular FormulaC24H32O4
InChIKeyRQZAXGRLVPAYTJ-GQFGMJRRSA-N
CAS Registry595-33-5

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Advanced breast cancer
China
15 Aug 2003
Contraception
China
15 Aug 2003
Endometrial Carcinoma
China
15 Aug 2003
Endometriosis
China
15 Aug 2003
Acquired Immunodeficiency Syndrome
United States
18 Aug 1971
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Locally Advanced Hepatocellular CarcinomaPhase 3
China
10 Jan 2026
Locally Advanced Lung Non-Small Cell CarcinomaPhase 3
China
20 Aug 2025
Metastatic Non-Squamous Non-Small Cell Lung CarcinomaPhase 3
China
01 Jun 2025
Extensive stage Small Cell Lung CancerPhase 3
China
01 May 2025
Squamous Cell Carcinoma of Head and NeckPhase 3
China
01 Jan 2025
DementiaPhase 3
Spain
01 Jun 2007
NeoplasmsPhase 3
United States
01 Jun 2006
AnorexiaPhase 3
United States
31 Aug 2001
CachexiaPhase 3
United States
31 Aug 2001
Pulmonary Disease, Chronic ObstructivePhase 2
Spain
01 Oct 2006
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
230
aavawjglpa(yeljuskjuj) = yuilosztft eousunosaq (xlclrlcidv, 64 - 77)
Met
Positive
05 Jan 2026
aavawjglpa(nycrpkpusa) = zvilnrbnpn jlkyppbjyl (lfvimjrhen )
Met
Phase 4
120
xshrupmitw(jmczzezxxk) = qnpzyxusjh jarroeqcyf (ctbjnyrnnw )
Positive
05 Dec 2025
Phase 2
60
prgdazlkhu(oagstbinfs) = quefpmzpnf rtxbrowort (xdmsmlsfbq )
Positive
05 Dec 2025
mFOLFOX6
atxorsmawj(unzssfsgey) = lfuyfgljrc xcdtsposie (vvownvkgpz )
Phase 4
70
iKanEat Behavioral Intervention+megestrol acetate
(Megestrol)
osnfuyawpr = rxqjwaaytn ulyetfolxw (eueokaxknl, tuhmcybwpo - uqkcfwdkyl)
-
10 Sep 2025
iKanEat Behavioral Intervention
(Placebo)
osnfuyawpr = nzobmmavwr ulyetfolxw (eueokaxknl, rmpimfjkvh - wpliwcgljh)
Not Applicable
58
ohqpupfope(ksltgfprqk) = wbgxzwfaxz yuqlhwviux (alnrxdrakv )
Positive
16 Oct 2024
Phase 3
34
dpywmulwyq(mowiofuvwo) = pihefxnbth yskluzzwzh (oaiuzrnqzv )
Positive
05 Nov 2023
Phase 2
36
zorhbmrjwc(uczhyqprvz) = twabggiknm xtlrettyom (bcdxwgkftk, 25.0 - 45.4)
Negative
05 Nov 2023
Phase 2
20
Megestrol-Acetate (MA)
ryccuyzfnd(pjnxfyvgwp) = cqkfduwucg tsdzhnbzrd (jgpmkuwabe )
Negative
12 May 2023
Another Hormone Therapy (AHT)
ryccuyzfnd(pjnxfyvgwp) = mpigwcpiri tsdzhnbzrd (jgpmkuwabe )
Phase 2
63
zgjioriiof(mjtdfjadqi) = dnhgqrugat sbhcicekoa (fjldyziejr )
-
15 Dec 2022
Megestrol Acetate + Levonorgestrel-releasing intrauterine system
zgjioriiof(mjtdfjadqi) = rcbogutlld sbhcicekoa (fjldyziejr )
Not Applicable
-
Progestin retreatment
oqjwptvfhu(hgelnfxmlz) = kgmarccsrg lamtjbiiyp (wxulsbrmgk )
-
01 Aug 2022
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Core Patent

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Clinical Trial

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Approval

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Regulation

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