MEGESTROL

First approved in 1971

Details

Stereochemistry	ABSOLUTE
Molecular Formula	C22H30O3
Molecular Weight	342.4726
Optical Activity	UNSPECIFIED
Defined Stereocenters	6 / 6
E/Z Centers	0
Charge	0

SHOW SMILES / InChI

Structure Search

SMILES

CC1=C[C@]2([H])[C@]([H])(CC[C@@]3(C)[C@@]2([H])CC[C@@]3(C(=O)C)O)[C@@]4(C)CCC(=O)C=C14

InChI

InChIKey=VXIMPSPISRVBPZ-NWUMPJBXSA-N

InChI=1S/C22H30O3/c1-13-11-16-17(20(3)8-5-15(24)12-19(13)20)6-9-21(4)18(16)7-10-22(21,25)14(2)23/h11-12,16-18,25H,5-10H2,1-4H3/t16-,17+,18+,20-,21+,22+/m1/s1

HIDE SMILES / InChI

Description
Sources: http://www.accessdata.fda.gov/drugsatfda_docs/label/2012/020264s017lbl.pdf
Curator's Comment:: description was created based on several sources, including https://www.ncbi.nlm.nih.gov/pubmed/?term=23395103

Megestrol acetate is a progestational hormone used most commonly as the acetate ester. As the acetate, it is more potent than progesterone both as a progestagen and as an ovulation inhibitor. It has also been used in the palliative treatment of breast cancer. MEGACE Oral Suspension is indicated for the treatment of anorexia, cachexia, or an unexplained, significant weight loss in patients with a diagnosis of acquired immunodeficiency syndrome (AIDS). The precise mechanism by which megestrol acetate produces effects in anorexia and cachexia is unknown at the present time. But its progestin antitumour activity may involve suppression of luteinizing hormone by inhibition of pituitary function. Studies also suggest that the megestrol's weight gain effect is related to its appetite-stimulant or metabolic effects rather than its glucocorticoid-like effects or the production of edema. It has also been suggested that megestrol may alter metabolic pathyways via interferences with the production or action of mediators such as cachectin, a hormone that inhibits adipocyte lipogenic enzymes. The major route of drug elimination in humans is urine. When radiolabeled megestrol acetate was administered to humans in doses of 4 to 90 mg, the urinary excretion within 10 days ranged from 56.5% to 78.4% (mean 66.4%) and fecal excretion ranged from 7.7% to 30.3% (mean 19.8%). The total recovered radioactivity varied between 83.1% and 94.7% (mean 86.2%). Megestrol acetate metabolites which were identified in urine constituted 5% to 8% of the dose administered. Respiratory excretion as labeled carbon dioxide and fat storage may have accounted for at least part of the radioactivity not found in urine and feces. Plasma steady-state pharmacokinetics of megestrol acetate were evaluated in 10 adult, cachectic male patients with acquired immunodeficiency syndrome (AIDS) and an involuntary weight loss greater than 10% of baseline. Patients received single oral doses of 800 mg/day of MEGACE Oral Suspension for 21 days. Plasma concentration data obtained on day 21 were evaluated for up to 48 hours past the last dose.

Originator

Approval Year

Targets

Primary Target	Pharmacology	Condition	Potency
Progesterone receptor 59 Target ID: CHEMBL208 Sources: https://www.ncbi.nlm.nih.gov/pubmed/15086241	Agonist 2470

Conditions

Condition	Modality	Targets	Highest Phase	Product
Anorexia 5 Sources: http://www.accessdata.fda.gov/drugsatfda_docs/label/2012/020264s017lbl.pdf	Palliative		Approved 8043	MEGACE Approved Use Megestrol acetate oral suspension is indicated for the treatment of anorexia, cachexia, or an unexplained, significant weight loss in patients with a diagnosis of acquired immunodeficiency syndrome (AIDS). Launch Date 7.4761922E11
Cachexia 8 Sources: http://www.accessdata.fda.gov/drugsatfda_docs/label/2012/020264s017lbl.pdf	Palliative		Approved 8043	MEGACE Approved Use Megestrol acetate oral suspension is indicated for the treatment of anorexia, cachexia, or an unexplained, significant weight loss in patients with a diagnosis of acquired immunodeficiency syndrome (AIDS). Launch Date 7.4761922E11

C_max

Value	Dose	Analyte	Population
753 ng/mL DRUG LABEL https://www.accessdata.fda.gov/drugsatfda_docs/label/2007/021778s002s003lbl.pdf	800 mg 1 times / day steady-state, oral dose: 800 mg route of administration: Oral experiment type: STEADY-STATE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: MALE food status: UNKNOWN
490 ng/mL DRUG LABEL https://www.accessdata.fda.gov/drugsatfda_docs/label/2007/021778s002s003lbl.pdf	750 mg 1 times / day steady-state, oral dose: 750 mg route of administration: Oral experiment type: STEADY-STATE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: MALE food status: UNKNOWN
1133 ng/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	625 mg single, oral dose: 625 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED
1618 ng/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	625 mg single, oral dose: 625 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FED
1364 ng/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	800 mg single, oral dose: 800 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FED
187 ng/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	800 mg single, oral dose: 800 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED

AUC

Value	Dose	Analyte	Population
10476 ng × h/mL DRUG LABEL https://www.accessdata.fda.gov/drugsatfda_docs/label/2007/021778s002s003lbl.pdf	800 mg 1 times / day steady-state, oral dose: 800 mg route of administration: Oral experiment type: STEADY-STATE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: MALE food status: UNKNOWN
6779 ng × h/mL DRUG LABEL https://www.accessdata.fda.gov/drugsatfda_docs/label/2007/021778s002s003lbl.pdf	750 mg 1 times / day steady-state, oral dose: 750 mg route of administration: Oral experiment type: STEADY-STATE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: UNHEALTHY age: ADULT sex: MALE food status: UNKNOWN
12095 ng × h/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	625 mg single, oral dose: 625 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED
16268 ng × h/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	625 mg single, oral dose: 625 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FED
18625 ng × h/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	800 mg single, oral dose: 800 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FED
8942 ng × h/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	800 mg single, oral dose: 800 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED

T_1/2

Value	Dose	Analyte	Population
33.68 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	625 mg single, oral dose: 625 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED
39.75 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	625 mg single, oral dose: 625 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FED
32.84 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	800 mg single, oral dose: 800 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FED
31.38 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/19774117/	800 mg single, oral dose: 800 mg route of administration: Oral experiment type: SINGLE co-administered:	MEGESTROL ACETATE plasma	Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED

Doses

Dose	Population	Adverse events
400 mg 2 times / day multiple, oral Dose: 400 mg, 2 times / day Route: oral Route: multiple Dose: 400 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/15595341	unhealthy, 54-68 years n = 2 Health Status: unhealthy Age Group: 54-68 years Sex: F Population Size: 2 Sources: https://pubmed.ncbi.nlm.nih.gov/15595341	Disc. AE: Osteoporosis... AEs leading to discontinuation/dose reduction: Osteoporosis (2 patients) Sources: https://pubmed.ncbi.nlm.nih.gov/15595341
625 mg 1 times / day multiple, oral Recommended Dose: 625 mg, 1 times / day Route: oral Route: multiple Dose: 625 mg, 1 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/27218795	unhealthy, 65 years n = 1 Health Status: unhealthy Age Group: 65 years Sex: M Population Size: 1 Sources: https://pubmed.ncbi.nlm.nih.gov/27218795	Disc. AE: Adrenal insufficiency... AEs leading to discontinuation/dose reduction: Adrenal insufficiency (1 patient) Sources: https://pubmed.ncbi.nlm.nih.gov/27218795
40 mg 2 times / day multiple, oral Dose: 40 mg, 2 times / day Route: oral Route: multiple Dose: 40 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/16563066	unhealthy, 85 years n = 1 Health Status: unhealthy Condition: Alzheimer's disease Age Group: 85 years Sex: F Population Size: 1 Sources: https://pubmed.ncbi.nlm.nih.gov/16563066	Disc. AE: Deep vein thrombosis... AEs leading to discontinuation/dose reduction: Deep vein thrombosis (1 patient) Sources: https://pubmed.ncbi.nlm.nih.gov/16563066
400 mg 2 times / day multiple, oral Dose: 400 mg, 2 times / day Route: oral Route: multiple Dose: 400 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/16563066	unhealthy, 86 years n = 1 Health Status: unhealthy Condition: Alzheimer's disease Age Group: 86 years Sex: F Population Size: 1 Sources: https://pubmed.ncbi.nlm.nih.gov/16563066	Disc. AE: Deep vein thrombosis... AEs leading to discontinuation/dose reduction: Deep vein thrombosis (1 patient) Sources: https://pubmed.ncbi.nlm.nih.gov/16563066
1600 mg 1 times / day multiple, oral Highest studied dose Dose: 1600 mg, 1 times / day Route: oral Route: multiple Dose: 1600 mg, 1 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/3368800	unhealthy Health Status: unhealthy Condition: advanced breast cancer Sex: F Sources: https://pubmed.ncbi.nlm.nih.gov/3368800	Sources: https://pubmed.ncbi.nlm.nih.gov/3368800

AEs

AE	Significance	Dose	Population
Osteoporosis	2 patients Disc. AE	400 mg 2 times / day multiple, oral Dose: 400 mg, 2 times / day Route: oral Route: multiple Dose: 400 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/15595341	unhealthy, 54-68 years n = 2 Health Status: unhealthy Age Group: 54-68 years Sex: F Population Size: 2 Sources: https://pubmed.ncbi.nlm.nih.gov/15595341
Adrenal insufficiency	1 patient Disc. AE	625 mg 1 times / day multiple, oral Recommended Dose: 625 mg, 1 times / day Route: oral Route: multiple Dose: 625 mg, 1 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/27218795	unhealthy, 65 years n = 1 Health Status: unhealthy Age Group: 65 years Sex: M Population Size: 1 Sources: https://pubmed.ncbi.nlm.nih.gov/27218795
Deep vein thrombosis	1 patient Disc. AE	40 mg 2 times / day multiple, oral Dose: 40 mg, 2 times / day Route: oral Route: multiple Dose: 40 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/16563066	unhealthy, 85 years n = 1 Health Status: unhealthy Condition: Alzheimer's disease Age Group: 85 years Sex: F Population Size: 1 Sources: https://pubmed.ncbi.nlm.nih.gov/16563066
Deep vein thrombosis	1 patient Disc. AE	400 mg 2 times / day multiple, oral Dose: 400 mg, 2 times / day Route: oral Route: multiple Dose: 400 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/16563066	unhealthy, 86 years n = 1 Health Status: unhealthy Condition: Alzheimer's disease Age Group: 86 years Sex: F Population Size: 1 Sources: https://pubmed.ncbi.nlm.nih.gov/16563066

Overview

CYP3A4	CYP2C9	CYP2D6	hERG
inhibitor 1467 inducer 707 substrate 1601	inhibitor 1604 inducer 355 substrate 936	inhibitor 1702 substrate 1118

OverviewOther

Other Inhibitor	Other Substrate	Other Inducer
CYP2A6 627 CYP2C19 1325	CYP3A5 367 CYP1A2 972 CYP2A6 485 CYP2B6 616 CYP2C8 634 CYP2C19 910 CYP2E1 606 CYP4A11 93	CYP1A2 637

Drug as perpetrator

Target	Modality	Activity
CYP2A6 659	inhibitor 3045 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=13 Page: 13.0	mild [Inhibition 50 uM]
CYP2D6 1738	inhibitor 3045 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=13 Page: 13.0	mild [Inhibition 50 uM]
CYP2C19 1392	inhibitor 3045 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=13 Page: 13.0	moderate [Inhibition 50 uM]
CYP2C9 1648	inhibitor 3045 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=13 Page: 13.0	moderate [Inhibition 50 uM]
CYP1A2 1532	inducer 1440 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=14 Page: 14.0	no
CYP2C9 1648	inducer 1440 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=14 Page: 14.0	no
CYP3A4 1772	inducer 1440 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=14 Page: 14.0	no
CYP1A2 1532	activator 202 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=13 Page: 13.0	yes [Activation 50 uM]
CYP2E1 871	activator 202 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=13 Page: 13.0	yes [Activation 50 uM]
CYP3A4 1772	inhibitor 3045 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2005/021778s000_ClinPharmR.pdf#page=13 Page: 13.0	yes [Inhibition 50 uM]

Drug as victim

Target	Modality	Activity
CYP1A2 972	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP2A6 485	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP2B6 616	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP2C19 910	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP2C8 634	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP2C9 936	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP2D6 1118	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP2E1 606	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP4A11 93	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	no
CYP3A4 1601	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	yes
CYP3A5 367	substrate 3113 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6129397/	yes

Sourcing

Vendor/Aggregator	ID	URL
ChEBI	CHEBI:6722	https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:6722
ZINC	ZINC000033902346	http://zinc15.docking.org/substances/ZINC000033902346

PubMed

Title	Date	PubMed
Effect of nomegestrol acetate on human estrogen sulfotransferase activity in the hormone-dependent MCF-7 and T-47D breast cancer cell lines.	2003 Nov-Dec	14981909
Nomegestrol acetate: a progestin that deserves recognition.	2004 Apr	15114527
The role of MRI in the conservative management of endometrial cancer.	2004 Apr	15047242
A comparison of the central effects of different progestins used in hormone replacement therapy.	2004 Aug 20	15283939
Osteoporosis associated with megestrol acetate.	2004 Dec	15595341
[Nome gesrol (lutenyl) induced severe acute hepatitis].	2004 Jan	15041823
Serum leptin levels and body composition in postmenopausal women: effects of hormone therapy.	2004 Jul-Aug	15243285
Therapy for unresectable hepatocellular carcinoma: review of the randomized clinical trials-II: systemic and local non-embolization-based therapies in unresectable and advanced hepatocellular carcinoma.	2004 Jun	15166617
Aromatase inhibition in the treatment of advanced breast cancer: is there a relationship between potency and clinical efficacy?	2004 May 4	15150604
Cost utility and budget impact of third-generation aromatase inhibitors for advanced breast cancer: a literature-based model analysis of costs in the Italian National Health Service.	2004 Sep	15531017
Clinical utility of serum HER2/neu in monitoring and prediction of progression-free survival in metastatic breast cancer patients treated with trastuzumab-based therapies.	2005	15987448
The science of megestrol acetate delivery: potential to improve outcomes in cachexia.	2005	15984902
Retrospective review of megestrol use for weight loss in an elderly veteran population.	2005 Apr	16548634
Effects of the combined treatment with thalidomide, megestrol and interleukine-2 in cirrhotic patients with advanced hepatocellular carcinoma. A pilot study.	2005 Apr	15788209
Treatment with inhibitors of angiogenesis in advanced hepatocellular carcinoma: a new tool in our hands or simply a hope?	2005 Apr	15788205
The effects of aromatase inhibitors on lipids and thrombosis.	2005 Aug	16100522
Bone loss and the aromatase inhibitors.	2005 Aug	16100521
Role of aromatase inhibitors in breast cancer.	2005 Aug	16100519
[Actions of a 19-norprogesterone derivative on mammary gland: nomegestrol acetate].	2005 Feb	15767920
Effect of nomegestrol acetate on estrogen biosynthesis and transformation in MCF-7 and T47-D breast cancer cells.	2005 Jan	15748827
Control of sulfatase activity by nomegestrol acetate in normal and cancerous human breast tissues.	2005 Jul-Aug	16080533
Nomegestrol acetate may enhance the skeletal effects of estradiol on biochemical markers of bone turnover in menopausal women after a 12-week treatment period.	2005 Jun	16096169
Pregnancy following intracytoplasmic sperm injection and preimplantation genetic diagnosis after the conservative management of endometrial cancer.	2005 Jun	15970008
Antigenotoxic effects of ascorbic acid against megestrol acetate-induced genotoxicity in mice.	2005 Mar	15901051
Hormonal treatment of a recurrent granulosa cell tumor of the ovary: case report and review of the literature.	2005 Mar	15721440
Phase II study of sequential hormonal therapy with anastrozole/exemestane in advanced and metastatic breast cancer.	2005 May 9	15856035
Benign metastasizing leiomyoma responsive to megestrol: case report and review of the literature.	2005 Nov-Dec	16343217
The role of aromatase inhibitors in ameliorating deleterious effects of ovarian stimulation on outcome of infertility treatment.	2005 Oct 4	16202169
[Isolation and identification of two new epimer from the mother liquid of megestrol acetate].	2005 Sep	16342686
Review of cost-effectiveness analyses in hormonal therapies in advanced breast cancer.	2005 Sep	16144501
Bleeding patterns during continuous estradiol with different sequential progestogens therapy.	2005 Sep-Oct	16145305
Progestogens: effects on clinical and biochemical parameters in postmenopausal women.	2005 Sep-Oct	16145299
Letrozole: a pharmacoeconomic review of its use in postmenopausal women with breast cancer.	2006	16706574
Megestrol attenuates the hormonal response to CCK-4-induced panic attacks.	2006	16470820
Hepatocellular carcinoma--Pathological complete response to oral capecitabine, megestrol and thalidomide.	2006	16464803
Effects of a single Silastic contraceptive implant containing nomegestrol acetate (Uniplant) on endometrial morphology and ovarian function for 1 year.	2006 Dec	17157108
Durable response of metastatic endometrial carcinoma to treatment with fulvestrant (Faslodex) after prior progestin and anastrozole therapy.	2006 Feb	16257043
Effects of estrogen, raloxifene, and hormone replacement therapy on serum C-reactive protein and homocysteine levels.	2006 Feb 20	15990257
Nanoparticles of poorly water-soluble drugs prepared by supercritical fluid extraction of emulsions.	2006 Jan	16307386
Short-term progestin treatments prevent estrous induction by a GnRH agonist implant in anestrous bitches.	2006 Jan 20	15975646
Orchiectomy or androgen receptor blockade attenuates baroreflex-mediated bradycardia in conscious rats.	2006 Jan 23	16430770
A successful live birth through in vitro fertilization program after conservative treatment of FIGO grade I endometrial cancer.	2006 Jun	16778408
Characterization of related impurities in megestrol acetate.	2006 Jun 16	16616448
Second- and third-generation aromatase inhibitors as first-line endocrine therapy in postmenopausal metastatic breast cancer patients: a pooled analysis of the randomised trials.	2006 Jun 19	16736002
Cyclic progestin administration increases energy expenditure and decreases body fat mass in perimenopausal women.	2006 Mar-Apr	16645533
New progestagens for contraceptive use.	2006 Mar-Apr	16291771
[Pharmacological therapy of cancer anorexia-cachexia].	2006 May	16768027
Activation of nitric oxide synthesis in human endothelial cells using nomegestrol acetate.	2006 Oct	17012461
Testosterone supplementation of megestrol therapy does not enhance lean tissue accrual in men with human immunodeficiency virus-associated weight loss: a randomized, double-blind, placebo-controlled, multicenter trial.	2007 Feb	17090640
Longitudinal evaluation of serum leptin and bone mineral density in early postmenopausal women.	2007 May-Jun	17242633

Patents

Sample Use Guides

In Vivo Use Guide

Oral Suspension is 800 mg/day (20 mL/day). In clinical trials evaluating different dose schedules, daily doses of 400 and 800 mg/day.

Route of Administration: Oral

In Vitro Use Guide

Megestrol acetate was shown to inhibit the growth of HepG2 cells in vitro in dose- and time-dependent manners with an IC (50) of 260 uM (24-h incubation)

Name

Type

Language

MEGESTROL

Official Name

English

MEGESTROL [WHO-DD]

Common Name

English

MEGESTROL [VANDF]

Common Name

English

MEGESTROL [HSDB]

Common Name

English

MEGESTROL ACETATE SPECIFIED IMPURITY B [EP]

Common Name

English

17-HYDROXY-6-METHYLPREGNA-4,6-DIENE-3,20-DIONE

Systematic Name

English

CHRONOPIL

Brand Name

English

MEGESTROL [INN]

Common Name

English

Classification Tree Code System Code

WHO-VATC

QG03AC05