Estradiol benzoate/hydroxyprogesterone caproate (EB/OHPC), sold under the brand name Primosiston among others, is a combined estrogen and progestogen medication which is used to treat gynecological disorders and habitual abortion. It contains estradiol benzoate (EB), an estrogen, and hydroxyprogesterone caproate (OHPC), a progestin. The medication is given by injection into muscle.
Medical uses
EB/OHPC is used in the treatment of gynecological disorders such as menstrual disorders (e.g., amenorrhea, dysfunctional uterine bleeding) and premenstrual syndrome, habitual abortion (threatened miscarriage), and for other indications.
Available forms
EB/OHPC is available in the form of ampoules of oil solutions containing 10 mg estradiol benzoate (EB) and 125 to 250 mg hydroxyprogesterone caproate (OHPC).
History
EB/OHPC was first introduced for medical use in 1955.
Society and culture
Brand names
EB/OHPC has been marketed under brand names including Dos Dias N, Lutes, Ostrolut, Primosiston (or Primosiston Inj. / Injection), Primosiston Fuerte, and Syngynon.
Availability
EB/OHPC has been mostly discontinued and hence is mostly no longer available. It remains marketed under the brand names Primosiston in Ecuador and Peru, Dos Dias N in Argentina, and Lutes in Japan. It was previously marketed under the brand names Ostrolut in Austria; Primosiston (or Primosiston Inj. / Injection) (Schering) in Argentina, Germany, Mexico, Switzerland, and Venezuela; Primosiston Fuerte in Spain; and Syngynon in Germany, but these formulations have all been discontinued and hence are no longer available in these countries.
See also
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Estrogens |
ER agonists |
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Steroidal: Alfatradiol
- Certain androgens/anabolic steroids (e.g., testosterone, testosterone esters, methyltestosterone, metandienone, nandrolone esters) (via estrogenic metabolites)
- Certain progestins (e.g., norethisterone, noretynodrel, etynodiol diacetate, tibolone)
- Clomestrone
- Cloxestradiol acetate
- Conjugated estriol
- Conjugated estrogens
- Epiestriol
- Epimestrol
- Esterified estrogens
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Estetrol†
- Estradiol
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Estradiol esters (e.g., estradiol acetate, estradiol benzoate, estradiol cypionate, estradiol enanthate, estradiol undecylate, estradiol valerate, polyestradiol phosphate, estradiol ester mixtures (Climacteron))
- Estramustine phosphate
- Estriol
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Estriol esters (e.g., estriol succinate, polyestriol phosphate)
- Estrogenic substances
- Estrone
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Estrone esters
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Ethinylestradiol#
- Hydroxyestrone diacetate
- Mestranol
- Methylestradiol
- Moxestrol
- Nilestriol
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Prasterone (dehydroepiandrosterone; DHEA)
- Promestriene
- Quinestradol
- Quinestrol
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Progonadotropins |
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Antiestrogens |
ER antagonists (incl. SERMs/SERDs) |
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Aromatase inhibitors |
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Antigonadotropins |
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Androgens/anabolic steroids (e.g., testosterone, testosterone esters, nandrolone esters, oxandrolone, fluoxymesterone)
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D2 receptor antagonists (prolactin releasers) (e.g., domperidone, metoclopramide, risperidone, haloperidol, chlorpromazine, sulpiride)
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GnRH agonists (e.g., leuprorelin, goserelin)
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GnRH antagonists (e.g., cetrorelix, elagolix)
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Progestogens (e.g., chlormadinone acetate, cyproterone acetate, gestonorone caproate, hydroxyprogesterone caproate, medroxyprogesterone acetate, megestrol acetate)
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Others |
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ER |
Agonists |
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Steroidal: 2-Hydroxyestradiol
- 2-Hydroxyestrone
- 3-Methyl-19-methyleneandrosta-3,5-dien-17β-ol
- 3α-Androstanediol
- 3α,5α-Dihydrolevonorgestrel
- 3β,5α-Dihydrolevonorgestrel
- 3α-Hydroxytibolone
- 3β-Hydroxytibolone
- 3β-Androstanediol
- 4-Androstenediol
- 4-Androstenedione
- 4-Fluoroestradiol
- 4-Hydroxyestradiol
- 4-Hydroxyestrone
- 4-Methoxyestradiol
- 4-Methoxyestrone
- 5-Androstenediol
- 7-Oxo-DHEA
- 7α-Hydroxy-DHEA
- 7α-Methylestradiol
- 7β-Hydroxyepiandrosterone
- 8,9-Dehydroestradiol
- 8,9-Dehydroestrone
- 8β-VE2
- 10β,17β-Dihydroxyestra-1,4-dien-3-one (DHED)
- 11β-Chloromethylestradiol
- 11β-Methoxyestradiol
- 15α-Hydroxyestradiol
- 16-Ketoestradiol
- 16-Ketoestrone
- 16α-Fluoroestradiol
- 16α-Hydroxy-DHEA
- 16α-Hydroxyestrone
- 16α-Iodoestradiol
- 16α-LE2
- 16β-Hydroxyestrone
- 16β,17α-Epiestriol (16β-hydroxy-17α-estradiol)
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17α-Estradiol (alfatradiol)
- 17α-Dihydroequilenin
- 17α-Dihydroequilin
- 17α-Epiestriol (16α-hydroxy-17α-estradiol)
- 17α-Ethynyl-3α-androstanediol
- 17α-Ethynyl-3β-androstanediol
- 17β-Dihydroequilenin
- 17β-Dihydroequilin
- 17β-Methyl-17α-dihydroequilenin
- Abiraterone
- Abiraterone acetate
- Alestramustine
- Almestrone
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Anabolic steroids (e.g., testosterone and esters, methyltestosterone, metandienone (methandrostenolone), nandrolone and esters, many others; via estrogenic metabolites)
- Atrimustine
- Bolandiol
- Bolandiol dipropionate
- Butolame
- Clomestrone
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Cloxestradiol
- Conjugated estriol
- Conjugated estrogens
- Cyclodiol
- Cyclotriol
- DHEA
- DHEA-S
- ent-Estradiol
- Epiestriol (16β-epiestriol, 16β-hydroxy-17β-estradiol)
- Epimestrol
- Equilenin
- Equilin
- ERA-63 (ORG-37663)
- Esterified estrogens
- Estetrol
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Estradiol
- Estramustine
- Estramustine phosphate
- Estrapronicate
- Estrazinol
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Estriol
- Estrofurate
- Estrogenic substances
- Estromustine
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Estrone
- Etamestrol (eptamestrol)
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Ethinylandrostenediol
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Ethinylestradiol
- Ethinylestriol
- Ethylestradiol
- Etynodiol
- Etynodiol diacetate
- Hexolame
- Hippulin
- Hydroxyestrone diacetate
- Lynestrenol
- Lynestrenol phenylpropionate
- Mestranol
- Methylestradiol
- Moxestrol
- Mytatrienediol
- Nilestriol
- Norethisterone
- Noretynodrel
- Orestrate
- Pentolame
- Prodiame
- Prolame
- Promestriene
- RU-16117
- Quinestradol
- Quinestrol
- Tibolone
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Xenoestrogens: Anise-related (e.g., anethole, anol, dianethole, dianol, photoanethole)
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Chalconoids (e.g., isoliquiritigenin, phloretin, phlorizin (phloridzin), wedelolactone)
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Coumestans (e.g., coumestrol, psoralidin)
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Flavonoids (incl. 7,8-DHF, 8-prenylnaringenin, apigenin, baicalein, baicalin, biochanin A, calycosin, catechin, daidzein, daidzin, ECG, EGCG, epicatechin, equol, formononetin, glabrene, glabridin, genistein, genistin, glycitein, kaempferol, liquiritigenin, mirificin, myricetin, naringenin, penduletin, pinocembrin, prunetin, puerarin, quercetin, tectoridin, tectorigenin)
- Lavender oil
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Lignans (e.g., enterodiol, enterolactone, nyasol (cis-hinokiresinol))
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Metalloestrogens (e.g., cadmium)
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Pesticides (e.g., alternariol, dieldrin, endosulfan, fenarimol, HPTE, methiocarb, methoxychlor, triclocarban, triclosan)
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Phytosteroids (e.g., digitoxin (digitalis), diosgenin, guggulsterone)
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Phytosterols (e.g., β-sitosterol, campesterol, stigmasterol)
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Resorcylic acid lactones (e.g., zearalanone, α-zearalenol, β-zearalenol, zearalenone, zeranol (α-zearalanol), taleranol (teranol, β-zearalanol))
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Steroid-like (e.g., deoxymiroestrol, miroestrol)
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Stilbenoids (e.g., resveratrol, rhaponticin)
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Synthetic xenoestrogens (e.g., alkylphenols, bisphenols (e.g., BPA, BPF, BPS), DDT, parabens, PBBs, PHBA, phthalates, PCBs)
- Others (e.g., agnuside, rotundifuran)
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Mixed (SERMs) |
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Antagonists |
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Coregulator-binding modulators: ERX-11
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GPER |
Agonists |
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Antagonists |
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Unknown |
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PR |
Agonists |
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Testosterone derivatives: Progestins: 6,6-Difluoronorethisterone
- 6,6-Difluoronorethisterone acetate
- 17α-Allyl-19-nortestosterone
- Allylestrenol
- Altrenogest
- Chloroethynylnorgestrel
- Cingestol
- Danazol
- Desogestrel
- Dienogest
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Ethinylandrostenediol
- Ethisterone
- Ethynerone
- Etonogestrel
- Etynodiol
- Etynodiol diacetate
- Gestodene
- Gestrinone
- Levonorgestrel
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Levonorgestrel esters (e.g., levonorgestrel butanoate)
- Lynestrenol
- Lynestrenol phenylpropionate
- Metynodiol
- Metynodiol diacetate
- Norelgestromin
- Norethisterone (norethindrone)
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Norethisterone esters (e.g., norethisterone acetate, norethisterone enanthate)
- Noretynodrel
- Norgesterone
- Norgestimate
- Norgestrel
- Norgestrienone
- Norvinisterone
- Oxendolone
- Quingestanol
- Quingestanol acetate
- Tibolone
- Tigestol
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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
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Nandrolone esters (e.g., nandrolone decanoate, nandrolone phenylpropionate)
- Norethandrolone
- Normethandrone (methylestrenolone, normethandrolone, normethisterone)
- RU-2309
- Tetrahydrogestrinone
- Trenbolone (trienolone)
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Trenbolone esters (e.g., trenbolone acetate, trenbolone enanthate)
- Trendione
- Trestolone
- Trestolone acetate
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Mixed (SPRMs) |
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Antagonists |
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mPR (PAQR) |
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