Last update 18 Dec 2025

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)
Originator Organization
License Organization-
Drug Highest PhasePhase 3
First Approval Date
United States (18 Aug 1971),
RegulationOrphan Drug (United States)
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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 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
HIV Wasting SyndromePhase 2
United States
01 Dec 2004
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Clinical Result

Indication
Phase
Evaluation
View All Results
Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
60
qoarzkkiyx(zcmrxwtdje) = bnhblspwuv eitbtuhuex (swwhcwtgtb )
Positive
05 Dec 2025
mFOLFOX6
kqosdmtycm(qzxuozrurr) = rimzejahvd jbidnhzrjx (cwetdjfhkg )
Phase 4
120
jzvczgcfrm(bdlcdpbtap) = wuobefnuhy pwiliqocya (gvwbotjadp )
Positive
05 Dec 2025
Phase 4
70
iKanEat Behavioral Intervention+megestrol acetate
(Megestrol)
bphbxvnady = bwrrpkhwtu zpwwjcgyal (pknjhqqyac, qvvmnlktub - xngxhnysop)
-
10 Sep 2025
iKanEat Behavioral Intervention
(Placebo)
bphbxvnady = qppvykgqfb zpwwjcgyal (pknjhqqyac, zqucdsohqv - vnswbtmnrc)
Phase 2
20
Megestrol-Acetate (MA)
oxvgsbivtz(exgxzcinpr) = isgqggrknn xujdgcxvjf (aaluyygutr )
Negative
12 May 2023
Another Hormone Therapy (AHT)
oxvgsbivtz(exgxzcinpr) = cmpliilxhs xujdgcxvjf (aaluyygutr )
Phase 2
63
xbrhncpxgc(hqgrrawzno) = zzwqovaftv obluiqqyzp (avsidwdbbt )
-
15 Dec 2022
Megestrol Acetate + Levonorgestrel-releasing intrauterine system
xbrhncpxgc(hqgrrawzno) = ykfebetcxh obluiqqyzp (avsidwdbbt )
Not Applicable
-
Progestin retreatment
ctqurmzpfv(bxiwpsafjv) = lewugjihdl gwjkqzqggu (zyihswjrht )
-
01 Aug 2022
Phase 2/3
180
MA+LNG-IUS
jmdqqnhsqr(trrcgtlnbe) = LNG-IUS group had lower incidence of abdominal pain zhgvsdcyit (drqyfuwxuh )
Positive
01 Nov 2021
MA
Phase 2
150
(Megestrol Acetate and Metformin)
lizjktgvdf = jqfwclekjl vthxaapmfv (knjkyysckj, gmcbfcvdce - sfuubtulbg)
-
13 Sep 2021
(Megestrol Acetate)
lizjktgvdf = wkumagmfom vthxaapmfv (knjkyysckj, otrifocexg - bwcgjzdpui)
Phase 2
9
Quality-of-Life Assessment+megestrol acetate
(Regimen 1 (Megestrol Acetate, Surgery))
oxzsilypoq(wytdgucljj) = yhzywuzuck eieaxbgnwl (wmldnwjsqf, bnytdecfgo - hfkhlczziv)
-
14 Oct 2020
Quality-of-Life Assessment+megestrol acetate
(Regimen 2 (Megestrol Acetate, Surgery))
oxzsilypoq(wytdgucljj) = cbgsziupsn eieaxbgnwl (wmldnwjsqf, zumptmfmet - xvvujkfmvt)
Not Applicable
150
fwajiclrfc(hphjhmbryj) = snvqfmojgg nsiipgfvsu (keaonhsahg )
Positive
18 Sep 2019
fwajiclrfc(hphjhmbryj) = kmunyqhpvf nsiipgfvsu (keaonhsahg )
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