Last update 27 Jan 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)
Originator Organization
Drug Highest PhasePhase 3
First Approval Date
United States (18 Aug 1971),
RegulationOrphan Drug (United States)
Login to view timeline

Structure/Sequence

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

R&D Status

Approved
10 top approved records.
Login
to view more data
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.
Login
to view more data
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
Login to view more data

Clinical Result

Indication
Phase
Evaluation
View All Results
Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
60
yyktkongfh(xlunacphup) = kupyknjygv tactosvybe (afputylyrm )
Positive
05 Dec 2025
mFOLFOX6
hbswvfyvfe(bmhptqdhlz) = khljwvozbg yiwpusvsln (huxxbzizle )
Phase 4
120
tzyswbwlci(dcvewfckua) = vqploxzmuj vxhvopzpof (reszekhqtl )
Positive
05 Dec 2025
Phase 4
70
iKanEat Behavioral Intervention+megestrol acetate
(Megestrol)
iyrjkvkrus = khegbcgpra wcockpxvqx (cqsbznnecq, ejhodyxqsa - atdbdhxqza)
-
10 Sep 2025
iKanEat Behavioral Intervention
(Placebo)
iyrjkvkrus = cmwxirtzfa wcockpxvqx (cqsbznnecq, fvbtcibdwc - bpebatkeir)
Phase 2
20
Megestrol-Acetate (MA)
wvyruhurfv(zfrsgsoqxv) = fbetgrweib yqadldwjex (xdkmeopbqk )
Negative
12 May 2023
Another Hormone Therapy (AHT)
wvyruhurfv(zfrsgsoqxv) = hrakgcnbfi yqadldwjex (xdkmeopbqk )
Phase 2
63
qdwrghqzqg(rhzglvmtpe) = waqzhayptj muxmogiusj (jmxvpkivyq )
-
15 Dec 2022
Megestrol Acetate + Levonorgestrel-releasing intrauterine system
qdwrghqzqg(rhzglvmtpe) = getpnpyyqj muxmogiusj (jmxvpkivyq )
Not Applicable
-
Progestin retreatment
xurzwliixt(eepsrayvoe) = sbkuhnoeys kqhqgltrhw (flgdnhfqnk )
-
01 Aug 2022
Phase 2/3
180
MA+LNG-IUS
wfrsknwenr(lglmljguir) = LNG-IUS group had lower incidence of abdominal pain hkogiyrcem (gnkmyvbkvt )
Positive
01 Nov 2021
MA
Phase 2
150
(Megestrol Acetate and Metformin)
ebrwjpvfnl = lckurblfew nlhqymnckg (yhexgkkiql, adkznwnwah - fvqakqaktn)
-
13 Sep 2021
(Megestrol Acetate)
ebrwjpvfnl = vcvlfgedmc nlhqymnckg (yhexgkkiql, pedcnzrufx - ojafnllvgx)
Phase 2
9
Quality-of-Life Assessment+megestrol acetate
(Regimen 1 (Megestrol Acetate, Surgery))
paezxzwebf(xglzvzkynx) = iorzfwzwtv nddtjbfmhz (ygvisxknlt, iymvtlunyg - gebkzxxawq)
-
14 Oct 2020
Quality-of-Life Assessment+megestrol acetate
(Regimen 2 (Megestrol Acetate, Surgery))
paezxzwebf(xglzvzkynx) = whgxofaxcx nddtjbfmhz (ygvisxknlt, pglvomwepo - qfcatjygeo)
Not Applicable
150
pfswadtmlv(tpigddlsym) = sbmnivbzqw udxzqhrtmz (qislxtdcmq )
Positive
18 Sep 2019
pfswadtmlv(tpigddlsym) = yipcisdjsy udxzqhrtmz (qislxtdcmq )
Login to view more data

Translational Medicine

Boost your research with our translational medicine data.
Boost your research with our translational medicine data.

Deal

Boost your decision using our deal data.
Boost your decision using our deal data.

Core Patent

Boost your research with our Core Patent data.
Boost your research with our Core Patent data.

Clinical Trial

Identify the latest clinical trials across global registries.
Identify the latest clinical trials across global registries.

Approval

Accelerate your research with the latest regulatory approval information.
Accelerate your research with the latest regulatory approval information.

Regulation

Understand key drug designations in just a few clicks with Synapse.
Understand key drug designations in just a few clicks with Synapse.
AI Agents Built for Biopharma Breakthroughs
Accelerate discovery. Empower decisions. Transform outcomes.
Get started for free today!
Accelerate Strategic R&D decision making with Synapse, PatSnap’s AI-powered Connected Innovation Intelligence Platform Built for Life Sciences Professionals.
Start your data trial now!
Synapse data is also accessible to external entities via APIs or data packages. Empower better decisions with the latest in pharmaceutical intelligence.
Bio
Bio Sequences Search & Analysis
Sign up for free
Chemical
Chemical Structures Search & Analysis
Sign up for free