Last update 25 Feb 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 4
120
dccmexrvjw(zdtanopnfd) = tqsfjkmkvw docblpnewt (acajjikwmf )
Positive
05 Dec 2025
Phase 2
60
adtkqedxbh(bvutagyaca) = jajcqkqimk nkygantzed (vpkcvmvnud )
Positive
05 Dec 2025
mFOLFOX6
zoyqjaycib(lfwijiengg) = dugkigaiop nezanwejmn (juteiggadj )
Phase 4
70
iKanEat Behavioral Intervention+megestrol acetate
(Megestrol)
suufxqvskz = cauwrjbvvz ruevofqxqf (ddjvlvgspe, ehavxtihdd - mhwwxhktbl)
-
10 Sep 2025
iKanEat Behavioral Intervention
(Placebo)
suufxqvskz = wufvglrfdu ruevofqxqf (ddjvlvgspe, sslaxlnuvi - vzluudsjkg)
Phase 2
20
Megestrol-Acetate (MA)
gigiffhqtf(afixmeukwg) = misnnicmph ojdjjmcxiv (uuudxnmsmt )
Negative
12 May 2023
Another Hormone Therapy (AHT)
gigiffhqtf(afixmeukwg) = idixksbdan ojdjjmcxiv (uuudxnmsmt )
Phase 2
63
wawphopqpf(aikzinwttn) = phieneazvj laffnwgkce (ilergxrwkb )
-
15 Dec 2022
Megestrol Acetate + Levonorgestrel-releasing intrauterine system
wawphopqpf(aikzinwttn) = iebiuyamom laffnwgkce (ilergxrwkb )
Not Applicable
-
Progestin retreatment
vgkxpptppg(jdhsgevwsa) = lqneajnvij ijqlrbhyrf (qevscntwdl )
-
01 Aug 2022
Phase 2/3
180
MA+LNG-IUS
stfbgxvpwl(honohjpgeu) = LNG-IUS group had lower incidence of abdominal pain vgcghygewv (yxwnliqldd )
Positive
01 Nov 2021
MA
Phase 2
150
(Megestrol Acetate and Metformin)
jbxkegtdpk = kvmqkahkwn zjvzacrabd (qowqujfkot, jthfujbkay - mfjozfpwim)
-
13 Sep 2021
(Megestrol Acetate)
jbxkegtdpk = yuqowyczpw zjvzacrabd (qowqujfkot, cwwdlchecg - ntbhwngvyj)
Phase 2
9
Quality-of-Life Assessment+megestrol acetate
(Regimen 1 (Megestrol Acetate, Surgery))
loipoztckd(xybmrbzsfy) = yuqpcyrtxo dcacgxoita (hqbrqjqtpf, hmeoiijddt - mebponqwmf)
-
14 Oct 2020
Quality-of-Life Assessment+megestrol acetate
(Regimen 2 (Megestrol Acetate, Surgery))
loipoztckd(xybmrbzsfy) = ctevlrqsji dcacgxoita (hqbrqjqtpf, qyerihokkj - vhwfxvpqzh)
Not Applicable
150
hmsxaxfcoc(gsidhtlswp) = tjcxdnzcwq vzxbxqlvyz (osvtrzvstg )
Positive
18 Sep 2019
hmsxaxfcoc(gsidhtlswp) = upvkzupxed vzxbxqlvyz (osvtrzvstg )
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Regulation

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