en Megestrol - 2025

Megestrol
Clinical data

ATC code	G03AC05
Identifiers
IUPAC name 17-hydroxy-6-methylpregna-4,6-diene-3,20-dione
CAS Number	3562-63-8^Y
PubChem CID	1909019090
ChemSpider	18023^Y
UNII	EA6LD1M70M
ChEBI	CHEBI:6722^N
CompTox Dashboard (EPA)	DTXSID001009330
ECHA InfoCard	100.020.571
Chemical and physical data
Formula	C₂₂H₃₀O₃
Molar mass	342.479 g·mol⁻¹
3D model (JSmol)	Interactive image
SMILES O=C4\C=C3\C(=C/[C@@H]1[C@H](CC[C@@]2([C@@](O)(C(=O)C)CC[C@@H]12)C)[C@@]3(C)CC4)C
InChI 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^Y Key:VXIMPSPISRVBPZ-NWUMPJBXSA-N^Y
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Megestrol (INNTooltip International Nonproprietary Name, BANTooltip British Approved Name) is a progestin of the 17α-hydroxyprogesterone group which was, until recently, never marketed or used clinically.^[1]^[2] It is now used for treatments of disease-related weight loss, endometrial cancer, and breast cancer.^[3] Its acylated derivative megestrol acetate is also a progestogen, which, in contrast to megestrol itself, has been extensively used as a pharmaceutical drug.^[1]^[2]

Medical Use

As of June 2023, megestrol is being used to treat significant weight loss in HIV/AIDS patients, and as a palliative treatment of endometrial and breast cancers. It can be administered in both tablet and oral suspension forms, with dosages ranging from 100 mg/day to 1600 mg/day depending on the condition being treated.^[3]

Synthesis

References

^ ^a ^b Macdonald F (1997). Dictionary of Pharmacological Agents. CRC Press. p. 1267. ISBN 978-0-412-46630-4. Retrieved 12 May 2012.
^ ^a ^b Index Nominum 2000: International Drug Directory. Taylor & Francis US. 2000. p. 641. ISBN 978-3-88763-075-1. Retrieved 28 May 2012.
^ ^a ^b Manikkuttiyil C, Nguyen H (2024). "Megestrol". StatPearls. Treasure Island (FL): StatPearls Publishing. PMID 32644631. Retrieved 2024-04-25.
^ Ringold HJ, Ruelas JP, Batres E, Djerassi C (1959). "Steroids. CXVIII.16-Methyl Derivatives of 17α-Hydroxyprogesterone and of Reichstein's Substance "S"". Journal of the American Chemical Society. 81 (14): 3712–3716. Bibcode:1959JAChS..81.3712R. doi:10.1021/ja01523a055.

Progesterone receptor modulators

Agonists	Progesterone derivatives: 3β-Dihydroprogesterone 5α-Dihydroprogesterone 6α-Methylprogesterone 9α-Bromo-11-ketoprogesterone 11-Dehydroprogesterone 11-Deoxycorticosterone 16α-Hydroxyprogesterone 17α-Methyl-11-deoxycorticosterone acetate 20α-Dihydroprogesterone 20β-Dihydroprogesterone Dimepregnen Diosgenin P1-185 Progesterone Progesterone 3-acetyl enol ether Quingestrone Retroprogesterone derivatives: 20α-Dihydrodydrogesterone 20α-Dihydrotrengestone DU-41164 DU-41165 Dydrogesterone Retroprogesterone Ro 6-3129 Trengestone 17α-Substituted progesterone derivatives: 6α-Methyl-17α-bromoprogesterone 15β-Hydroxycyproterone acetate 16-Methylene-17α-hydroxyprogesterone acetate 17α-Bromoprogesterone 17α-Hydroxyprogesterone (hydroxyprogesterone) 17α-Methylprogesterone Acetomepregenol (mepregenol diacetate) Algestone Algestone acetonide Algestone acetophenide Anagestone Anagestone acetate Bromethenmadinone Bromethenmadinone acetate Butagest (buterol) Chlormadinone Chlormadinone acetate Chlormadinone caproate Chlormethenmadinone Chlormethenmadinone acetate Cismadinone Cismadinone acetate Clogestone Clogestone acetate Clomegestone Clomegestone acetate Cymegesolate Cyproterone acetate Delmadinone Delmadinone acetate Edogestrone Flugestone Flugestone acetate Fluorometholone Fluorometholone acetate Flumedroxone Flumedroxone acetate Fluoromedroxyprogesterone acetate Gestaclone Gestobutanoyl Haloprogesterone Hydromadinone Hydromadinone acetate Hydroxyprogesterone acetate Hydroxyprogesterone caproate (hydroxyprogesterone hexanoate) Hydroxyprogesterone heptanoate (hydroxyprogesterone enanthate) Hydroxyprogesterone heptanoate benzilic acid hydrazone Mecigestone (pentarane B) Medrogestone Medroxyprogesterone Medroxyprogesterone acetate Medroxyprogesterone caproate Megestrol Megestrol acetate Megestrol caproate Melengestrol Melengestrol acetate Methenmadinone Methenmadinone acetate Methenmadinone caproate Mometasone Mometasone furoate Osaterone Osaterone acetate Pentagestrone Pentagestrone acetate Pentarane A Proligestone Triamcinolone acetonide 19-Norprogesterone derivatives: 17α-Methyl-19-norprogesterone 18-Methylsegesterone acetate 19-Norprogesterone Amadinone Amadinone acetate Demegestone Fluoro ethyl norprogesterone Fluoro furanyl norprogesterone Gestadienol Gestadienol acetate Gestonorone acetate (gestronol acetate) Gestonorone caproate (gestronol hexanoate) Gestronol (gestonorone) Nomegestrol Nomegestrol acetate Norgestomet ORG-2058 Oxogestone Oxogestone phenpropionate (xinogestone) Promegestone Segesterone Segesterone acetate (nestorone) Trimegestone Testosterone derivatives: Progestins: 6,6-Difluoronorethisterone 6,6-Difluoronorethisterone acetate 17α-Allyl-19-nortestosterone Allylestrenol Altrenogest Chloroethynylnorgestrel Cingestol Danazol Desogestrel Dienogest Ethinylandrostenediol Ethandrostate Ethisterone Ethynerone Etonogestrel Etynodiol Etynodiol diacetate Gestodene Gestrinone Levonorgestrel Levonorgestrel esters (e.g., levonorgestrel butanoate) Lynestrenol Lynestrenol phenylpropionate Metynodiol Metynodiol diacetate Norelgestromin Norethisterone (norethindrone) Norethisterone esters (e.g., norethisterone acetate, norethisterone enanthate) Noretynodrel Norgesterone Norgestimate Norgestrel Norgestrienone Norvinisterone Oxendolone Quingestanol Quingestanol acetate Tibolone Tigestol Tosagestin; Anabolic–androgenic steroids: 11β-Methyl-19-nortestosterone 11β-Methyl-19-nortestosterone dodecylcarbonate 19-Nor-5-androstenediol 19-Nor-5-androstenedione 19-Nordehydroepiandrosterone Bolandiol Bolandiol dipropionate Bolandione Dimethisterone Dienedione Dienolone Dimethandrolone Dimethandrolone buciclate Dimethandrolone dodecylcarbonate Dimethandrolone undecanoate Dimethyldienolone Dimethyltrienolone Ethyldienolone Ethylestrenol (ethylnandrol) Methyldienolone Metribolone (R-1881) Methoxydienone (methoxygonadiene) Mibolerone Nandrolone Nandrolone esters (e.g., nandrolone decanoate, nandrolone phenylpropionate) Norethandrolone Normethandrone (methylestrenolone, normethandrolone, normethisterone) RU-2309 Tetrahydrogestrinone Trenbolone (trienolone) Trenbolone esters (e.g., trenbolone acetate, trenbolone enanthate) Trendione Trestolone Trestolone acetate Spirolactone derivatives: Canrenoic acid Canrenone Drospirenone Mespirenone Potassium canrenoate Prorenone SC-5233 (spirolactone) SC-8109 Spironolactone Spirorenone Nonsteroidal: 3,8-Dihydrodiligustilide LG-2527 LG-100128 Riligustilide RWJ-26819 RWJ-49853 RWJ-60130 Tanaproget ZM-182345 Unknown: ORG-47241 ORG-201745
Mixed (SPRMsTooltip Selective progesterone receptor modulators)	Steroidal: Dihydroethisterone 5α-Dihydrolevonorgestrel 5α-Dihydronorethisterone Asoprisnil Asoprisnil ecamate Guggulsterone J1042 LG-120838 Metapristone (RU-42633) Mifepristone (RU-486) ORF-9371 ORF-9326 ORG-31710 ORG-33628 RMI-12936 Telapristone Ulipristal acetate Vilaprisan ZK-137316 Nonsteroidal: Apigenin Kaempferol LG-120920 Naringenin PRA-910 Syringic acid
Antagonists	Steroidal: Aglepristone Lilopristone Lonaprisan Onapristone ORG-31710 ORG-31806 ORG-33628 RTI 3021–022 Toripristone Zanoterone Nonsteroidal: Darolutamide LG-001447 LG-100127 LG-100128 LG-120830 LG-121046 Valproic acid ZM-150271 ZM-172406

mPR
(PAQR)

Agonists	5α-Dihydroprogesterone 5β-Dihydroprogesterone 11-Deoxycortisone (21-hydroxyprogesterone) 11-Deoxycortisol (17α,21-dihydroxyprogesterone) 17α-Hydroxyprogesterone Allopregnanolone Mifepristone Pregnenolone Progesterone
Antagonists	Mifepristone

See also: Receptor/signaling modulators; Progestogens and antiprogestogens; Androgen receptor modulators; Estrogen receptor modulators; List of progestogens

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Megestrol

Medical Use

Synthesis

See also

References

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