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Formestane
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Systematic (IUPAC) name
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(8R,9S,10R,13S,14S)-4-hydroxy-10,13-dimethyl- 2,6,7,8,9,11,12,14,15,16-decahydro-1H- cyclopenta[a]phenanthrene-3,17-dione
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Identifiers
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CAS number
| 566-48-3
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ATC code
| L02BG02
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PubChem
| 11273
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Chemical data
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Formula | C19H26O3
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Mol. mass | 302.408 g/mol
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Pharmacokinetic data
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Bioavailability | ?
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Metabolism | ?
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Half life | ?
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Excretion | ?
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Therapeutic considerations
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Pregnancy cat.
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?
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Legal status
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Routes
| ?
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Formestane belongs to a class of drugs known as aromatase inhibitors. It is used in the treatment of estrogen-receptor positive breast cancer in post-menopausal women. It is available as an intramuscular depot injection (Lentaron).
Additional recommended knowledge
Formestane is often used to suppress estrogen production from anabolic steroids or prohormones.
Formestane has poor oral bioavailability and as such is no longer popular as many orally available aromatase inhibitors have been developed.
It is available as a supplement for bodybuilders in transdermal formulations.
Sex hormones and related agents (primarily G03, also L02, H01C) - human endogenous in CAPS |
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Progestogens: (receptor) | PROGESTERONE, Desogestrel, Drospirenone, Dydrogesterone, Ethisterone, Etonogestrel, Ethynodiol diacetate, Gestodene, Gestonorone, Levonorgestrel, Lynestrenol, Medroxyprogesterone, Megestrol, Norelgestromin,
Norethisterone, Norethynodrel, Norgestimate, Norgestrel, Norgestrienone, Tibolone Selective progesterone receptor modulator: Asoprisnil, CDB-4124 Antiprogestogen: Mifepristone |
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Androgens: (receptor) | TESTOSTERONE, Androstanolone, Fluoxymesterone, Mesterolone, Methyltestosterone, (see also anabolic steroids) Antiandrogens: Bicalutamide, Cyproterone, Flutamide, Nilutamide, Spironolactone |
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Estrogens: (receptor) | ESTRADIOL, ESTRIOL, ESTRONE, Chlorotrianisene, Dienestrol, Diethylstilbestrol, Ethinylestradiol, Fosfestrol, Mestranol, Polyestradiol phosphate Selective estrogen receptor modulator: Bazedoxifene, Clomifene, Fulvestrant, Lasofoxifene, Raloxifene, Tamoxifen, Toremifene Aromatase inhibitor: Aminogluthetimide, Anastrozole, Exemestane, Formestane, Letrozole, Vorozole |
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Gonadotropins: (FSHR/LHCGR) | ovulation stim.: Clomifene, Urofollitropin Antigonadotropins:
Danazol, Gestrinone |
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GnRH: (receptor) | agonist: Buserelin, Goserelin, Histrelin, Leuprorelin, Nafarelin, Triptorelin antagonist:
Abarelix, Cetrorelix, Ganirelix |
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