- Vaginal cornification with a single intramuscular injection of different estradiol esters in oil solution in women. [41] Source was Schwartz & Soule (1955). [41]
Clinical data | |
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Trade names | Agofollin, Di-Ovocylin, Progynon DP, others |
Other names | EDP; Estradiol dipropionate; Estradiol 3,17β-dipropionate; Estra-1,3,5(10)-triene-3,17β-diol 3,17β-dipropanoate |
Routes of administration | Intramuscular injection |
Drug class | Estrogen; Estrogen ester |
ATC code | |
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Pharmacokinetic data | |
Bioavailability | IM: High [1] |
Protein binding | Estradiol: ~98% (to albumin and SHBG) [2] [3] |
Metabolism | Cleavage via esterases in the liver, blood, and tissues [4] [5] |
Metabolites | Estradiol, benzoic acid, and metabolites of estradiol [4] [5] |
Elimination half-life | Unknown |
Duration of action | IM (5 mg): 5–8 days [6] [7] |
Excretion | Urine |
Identifiers | |
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CAS Number | |
PubChem CID | |
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UNII | |
KEGG | |
ChEBI | |
ChEMBL | |
CompTox Dashboard (EPA) | |
ECHA InfoCard | 100.003.660 |
Chemical and physical data | |
Formula | C24H32O4 |
Molar mass | 384.516 g·mol−1 |
3D model (JSmol) | |
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Estradiol dipropionate (EDP), sold under the brand names Agofollin, Di-Ovocylin, and Progynon DP among others, is an estrogen medication which has been used in hormone therapy for menopausal symptoms and low estrogen levels in women and in the treatment of gynecological disorders. [8] [9] [10] [11] [12] [13] It has also been used in feminizing hormone therapy for transgender women and in the treatment of prostate cancer in men. [14] [8] Although widely used in the past, estradiol dipropionate has largely been discontinued and is mostly no longer available today. [15] [13] [11] It appears to remain in use only in Japan, Macedonia, and Australia. [13] Estradiol dipropionate is given by injection into muscle at intervals ranging from once or twice a week to once every week and a half to two weeks. [8] [16] [14]
Side effects of estradiol dipropionate include breast tenderness, breast enlargement, nausea, headache, and fluid retention. [17] Estradiol dipropionate is an estrogen and hence is an agonist of the estrogen receptor, the biological target of estrogens like estradiol. [5] [4] It is an estrogen ester and a prodrug of estradiol in the body. [4] [5] Because of this, it is considered to be a natural and bioidentical form of estrogen. [4]
Estradiol dipropionate was patented in 1937 [18] and was introduced for medical use by 1940. [19] [20] It was one of the earliest estradiol esters to be used. [8] Along with estradiol benzoate, estradiol dipropionate was among the most widely used esters of estradiol for many years following its introduction. [15]
The medical uses of estradiol dipropionate are the same as those of estradiol and other estrogens. [8] [9] Estradiol dipropionate is used in hormone therapy for the treatment of menopausal symptoms such as hot flashes and vaginal atrophy and in the treatment of hypoestrogenism and delayed puberty due to hypogonadism or other causes in women. [8] [9] It is also used in feminizing hormone therapy for transgender women. [14] Aside from hormone therapy, estradiol dipropionate is used in the treatment of gynecological disorders such as menstrual disorders, dysfunctional uterine bleeding, and breast engorgement. [8] [9] In addition, it is used as a form of high-dose estrogen therapy in the palliative treatment of prostate cancer in men. [8]
Estradiol dipropionate has typically been used at a dosage of 1 to 5 mg once or twice per week by intramuscular injection for relevant indications. [8] [16] It has been used in the treatment of menopausal symptoms at a dosage of 1 to 5 mg initially for two to three injections and 1 to 2.5 mg for maintenance once every 10 to 14 days, and in the treatment of hypoestrogenism and delayed puberty at a dosage of 2.5 to 5 mg once per week. [8] [21] As a component of feminizing hormone therapy for transgender women, estradiol dipropionate has been used at dosages of 2 to 10 mg once per week or 5 to 20 mg once every 2 weeks. [14] In the treatment of prostate cancer, estradiol dipropionate has been used at a dosage of 5 mg once per week. [8]
Estradiol dipropionate was previously available by itself as an oil solution for intramuscular injection provided as vials and ampoules at concentrations of 0.1, 0.2, 0.5, 1, 2.5, and 5 mg/mL. [8] [22] [23] [24] [25] The medication has largely been discontinued, with most of these formulations no longer being available. [11] [13] Estradiol dipropionate remains available at a concentration of 1 mg/mL in combination with 50 mg/mL hydroxyprogesterone caproate under the brand name EP Hormone Depot (Teikoku Zoki Pharmaceutical Company) in Japan. [26] [27] [28] [29] [30] [31] [32]
Contraindications of estrogens include coagulation problems, cardiovascular diseases, liver disease, and certain hormone-sensitive cancers such as breast cancer and endometrial cancer, among others. [33] [34] [35] [36]
The side effects of estradiol dipropionate are the same as those of estradiol. Examples of such side effects include breast tenderness and enlargement, nausea, bloating, edema, headache, and melasma. [17]
Symptoms of estrogen overdosage may include nausea, vomiting, bloating, increased weight, water retention, breast tenderness, vaginal discharge, heavy legs, and leg cramps. [33] These side effects can be diminished by reducing the estrogen dosage. [33]
Inhibitors and inducers of cytochrome P450 may influence the metabolism of estradiol and by extension circulating estradiol levels. [37]
Estradiol dipropionate is an estradiol ester, or a prodrug of estradiol. [4] [5] As such, it is an estrogen, or an agonist of the estrogen receptors. [4] [5] Estradiol dipropionate is of about 41% higher molecular weight than estradiol due to the presence of its C3 and C17β propionate esters. [10] [11] Because estradiol dipropionate is a prodrug of estradiol, it is considered to be a natural and bioidentical form of estrogen. [4]
Estrogen | Form | Dose (mg) | Duration by dose (mg) | ||
---|---|---|---|---|---|
EPD | CICD | ||||
Estradiol | Aq. soln. | ? | – | <1 d | |
Oil soln. | 40–60 | – | 1–2 ≈ 1–2 d | ||
Aq. susp. | ? | 3.5 | 0.5–2 ≈ 2–7 d; 3.5 ≈ >5 d | ||
Microsph. | ? | – | 1 ≈ 30 d | ||
Estradiol benzoate | Oil soln. | 25–35 | – | 1.66 ≈ 2–3 d; 5 ≈ 3–6 d | |
Aq. susp. | 20 | – | 10 ≈ 16–21 d | ||
Emulsion | ? | – | 10 ≈ 14–21 d | ||
Estradiol dipropionate | Oil soln. | 25–30 | – | 5 ≈ 5–8 d | |
Estradiol valerate | Oil soln. | 20–30 | 5 | 5 ≈ 7–8 d; 10 ≈ 10–14 d; 40 ≈ 14–21 d; 100 ≈ 21–28 d | |
Estradiol benz. butyrate | Oil soln. | ? | 10 | 10 ≈ 21 d | |
Estradiol cypionate | Oil soln. | 20–30 | – | 5 ≈ 11–14 d | |
Aq. susp. | ? | 5 | 5 ≈ 14–24 d | ||
Estradiol enanthate | Oil soln. | ? | 5–10 | 10 ≈ 20–30 d | |
Estradiol dienanthate | Oil soln. | ? | – | 7.5 ≈ >40 d | |
Estradiol undecylate | Oil soln. | ? | – | 10–20 ≈ 40–60 d; 25–50 ≈ 60–120 d | |
Polyestradiol phosphate | Aq. soln. | 40–60 | – | 40 ≈ 30 d; 80 ≈ 60 d; 160 ≈ 120 d | |
Estrone | Oil soln. | ? | – | 1–2 ≈ 2–3 d | |
Aq. susp. | ? | – | 0.1–2 ≈ 2–7 d | ||
Estriol | Oil soln. | ? | – | 1–2 ≈ 1–4 d | |
Polyestriol phosphate | Aq. soln. | ? | – | 50 ≈ 30 d; 80 ≈ 60 d | |
Notes and sources Notes: All aqueous suspensions are of microcrystalline particle size. Estradiol production during the menstrual cycle is 30–640 µg/d (6.4–8.6 mg total per month or cycle). The vaginal epithelium maturation dosage of estradiol benzoate or estradiol valerate has been reported as 5 to 7 mg/week. An effective ovulation-inhibiting dose of estradiol undecylate is 20–30 mg/month. Sources: See template. |
Compared to estradiol benzoate, a related estradiol ester, estradiol dipropionate has enhanced and prolonged effects. [38] [16] Whereas the duration of action of estradiol benzoate is said to be 2 to 3 days, the duration of estradiol dipropionate has been said to be 1 to 2 weeks. [39] However, newer estradiol esters have longer durations than either estradiol benzoate or estradiol dipropionate; the duration of estradiol valerate has been said to be 1 to 3 weeks, and the duration of estradiol cypionate has been said to be 3 to 4 weeks. [39] [16] A single intramuscular injection of 5 mg estradiol dipropionate has a duration of about 5 to 8 days. [6] [7]
A single intramuscular injection of 50 μg/kg estradiol dipropionate in oil in 15 pubertal girls (about 1 mg for a 50-kg (110-lb) girl) was found to produce peak estradiol levels of about 215 pg/mL after 1.5 days. [40] Estradiol levels declined to about 90 pg/mL after 4 days. [40]
Estradiol dipropionate, also known as estradiol 3,17β-dipropionate, is a synthetic estrane steroid and a derivative of estradiol. [10] [11] It is an estrogen ester; specifically, it is the C3,17β dipropionate ester of estradiol. [10] [11]
The experimental octanol/water partition coefficient (logP) of estradiol dipropionate is 4.9. [42]
Estrogen | Structure | Ester(s) | Relative mol. weight | Relative E2 contentb | log Pc | ||||
---|---|---|---|---|---|---|---|---|---|
Position(s) | Moiet(ies) | Type | Lengtha | ||||||
Estradiol | – | – | – | – | 1.00 | 1.00 | 4.0 | ||
Estradiol acetate | C3 | Ethanoic acid | Straight-chain fatty acid | 2 | 1.15 | 0.87 | 4.2 | ||
Estradiol benzoate | C3 | Benzoic acid | Aromatic fatty acid | – (~4–5) | 1.38 | 0.72 | 4.7 | ||
Estradiol dipropionate | C3, C17β | Propanoic acid (×2) | Straight-chain fatty acid | 3 (×2) | 1.41 | 0.71 | 4.9 | ||
Estradiol valerate | C17β | Pentanoic acid | Straight-chain fatty acid | 5 | 1.31 | 0.76 | 5.6–6.3 | ||
Estradiol benzoate butyrate | C3, C17β | Benzoic acid, butyric acid | Mixed fatty acid | – (~6, 2) | 1.64 | 0.61 | 6.3 | ||
Estradiol cypionate | C17β | Cyclopentylpropanoic acid | Cyclic fatty acid | – (~6) | 1.46 | 0.69 | 6.9 | ||
Estradiol enanthate | C17β | Heptanoic acid | Straight-chain fatty acid | 7 | 1.41 | 0.71 | 6.7–7.3 | ||
Estradiol dienanthate | C3, C17β | Heptanoic acid (×2) | Straight-chain fatty acid | 7 (×2) | 1.82 | 0.55 | 8.1–10.4 | ||
Estradiol undecylate | C17β | Undecanoic acid | Straight-chain fatty acid | 11 | 1.62 | 0.62 | 9.2–9.8 | ||
Estradiol stearate | C17β | Octadecanoic acid | Straight-chain fatty acid | 18 | 1.98 | 0.51 | 12.2–12.4 | ||
Estradiol distearate | C3, C17β | Octadecanoic acid (×2) | Straight-chain fatty acid | 18 (×2) | 2.96 | 0.34 | 20.2 | ||
Estradiol sulfate | C3 | Sulfuric acid | Water-soluble conjugate | – | 1.29 | 0.77 | 0.3–3.8 | ||
Estradiol glucuronide | C17β | Glucuronic acid | Water-soluble conjugate | – | 1.65 | 0.61 | 2.1–2.7 | ||
Estramustine phosphate d | C3, C17β | Normustine, phosphoric acid | Water-soluble conjugate | – | 1.91 | 0.52 | 2.9–5.0 | ||
Polyestradiol phosphate e | C3–C17β | Phosphoric acid | Water-soluble conjugate | – | 1.23f | 0.81f | 2.9g | ||
Footnotes:a = Length of ester in carbon atoms for straight-chain fatty acids or approximate length of ester in carbon atoms for aromatic or cyclic fatty acids. b = Relative estradiol content by weight (i.e., relative estrogenic exposure). c = Experimental or predicted octanol/water partition coefficient (i.e., lipophilicity/hydrophobicity). Retrieved from PubChem, ChemSpider, and DrugBank. d = Also known as estradiol normustine phosphate. e = Polymer of estradiol phosphate (~13 repeat units). f = Relative molecular weight or estradiol content per repeat unit. g = log P of repeat unit (i.e., estradiol phosphate). Sources: See individual articles. |
Estradiol dipropionate was first synthesized and patented in 1937. [43] [18] It was assessed in clinical studies by 1939 and was introduced by Ciba as an oil solution for use by intramuscular injection under the brand name Di-Ovocylin by the same year. [43] [38] [19] Other formulations such as Ovocyclin P by Ciba, Progynon DP by Schering and Dimenformon Dipropionate by Roche-Organon were also marketed by the early 1940s. [44] [45] [20] [46] Later in the 1940s the brand name Di-Ovocylin was changed by Ciba to Ovocylin Dipropionate. [22] Along with estradiol benzoate, which was introduced in 1933, [47] estradiol dipropionate was one of the first estradiol esters to be introduced for medical use. [48] [45] Prior to the development and introduction of longer-acting estradiol esters like estradiol valerate and estradiol cypionate in the 1950s, estradiol dipropionate and estradiol benzoate were the most widely used estradiol esters. [15] [49]
Estradiol dipropionate is the generic name of the drug and its INNM, BANM, and JAN. [10] [11] [12] [13]
Estradiol dipropionate has been marketed under a variety of brand names, including Agofollin, Akrofolline, Dihidrofolina "Kével", Dimenformon, Dimenformon Dipropionate, Diovocylin, Di-Ovocylin, Diprostron, Diprovex, Endofollicolina D.P., EP Hormone Depot (in combination with hydroxyprogesterone caproate), Estroici, Estronex, Follicyclin, Follicyclin P, Follikelmon Depot, Horiken-Depot, Nacyclyl, Oestradiol Galenika, Oestradiol Streuli, Orofollina, Ovacrin, Ovahormon Depot, Ovocylin, Ovocylin Dipropionate, Ovocylin P, and Progynon DP, among others. [50] [10] [11] [12] [51] [52] [13] Agofollin was an oil solution of estradiol dipropionate that was previously marketed in the Czech Republic and Slovakia. [53]
Estradiol dipropionate has been discontinued in most countries, but remains available in Japan and Macedonia alone under the brand names Ovahormon and Oestradiol Galenika and/or in combination with hydroxyprogesterone caproate under the brand name EP Hormone Depot. [11] [13] It is also marketed for use in veterinary medicine in combination with hydroxyprogesterone caproate and nandrolone decanoate under the brand name Reepair in Australia. [13]
Estradiol acetate (EA), sold under the brand names Femtrace, Femring, and Menoring, is an estrogen medication which is used in hormone therapy for the treatment of menopausal symptoms in women. It is taken by mouth once daily or given as a vaginal ring once every three months.
Estradiol valerate (EV), sold for use by mouth under the brand name Progynova and for use by injection under the brand names Delestrogen and Progynon Depot among others, is an estrogen medication. It is used in hormone therapy for menopausal symptoms and low estrogen levels, hormone therapy for transgender people, and in hormonal birth control. It is also used in the treatment of prostate cancer. The medication is taken by mouth or by injection into muscle or fat once every 1 to 4 weeks.
Norethisterone acetate (NETA), also known as norethindrone acetate and sold under the brand name Primolut-Nor among others, is a progestin medication which is used in birth control pills, menopausal hormone therapy, and for the treatment of gynecological disorders. The medication available in low-dose and high-dose formulations and is used alone or in combination with an estrogen. It is ingested orally.
Gestonorone caproate, also known as gestronol hexanoate or norhydroxyprogesterone caproate and sold under the brand names Depostat and Primostat, is a progestin medication which is used in the treatment of enlarged prostate and cancer of the endometrium. It is given by injection into muscle typically once a week.
Hydroxyprogesterone caproate, sold under the brand names Proluton and Makena among others, is a medication used to reduce the risk of preterm birth in women pregnant with one baby who have a history of spontaneous preterm birth. In March 2023, the manufacturer, Covis Pharma, agreed to withdraw the drug from the US market. The approvals of Makena and its generics were withdrawn by the US Food and Drug Administration (FDA) in April 2023.
Combined injectable contraceptives (CICs) are a form of hormonal birth control for women. They consist of monthly injections of combined formulations containing an estrogen and a progestin to prevent pregnancy.
Estradiol benzoate (EB), sold under the brand name Progynon-B among others, is an estrogen medication which is used in hormone therapy for menopausal symptoms and low estrogen levels in women, in hormone therapy for transgender women, and in the treatment of gynecological disorders. It is also used in the treatment of prostate cancer in men. Estradiol benzoate is used in veterinary medicine as well. When used clinically, the medication is given by injection into muscle usually two to three times per week.
Estradiol cypionate (EC), sold under the brand name Depo-Estradiol among others, is an estrogen medication which is used in hormone therapy for menopausal symptoms and low estrogen levels in women, in hormone therapy for trans women, and in hormonal birth control for women. It is given by injection into muscle once every 1 to 4 weeks.
Estradiol undecylate, also known as estradiol undecanoate and formerly sold under the brand names Delestrec and Progynon Depot 100 among others, is an estrogen medication which has been used in the treatment of prostate cancer in men. It has also been used as a part of hormone therapy for transgender women. Although estradiol undecylate has been used in the past, it was discontinued and hence is no longer available. The medication has been given by injection into muscle usually once a month.
An estrogen ester is an ester of an estrogen, most typically of estradiol but also of other estrogens such as estrone, estriol, and even nonsteroidal estrogens like diethylstilbestrol. Esterification renders estradiol into a prodrug of estradiol with increased resistance to first-pass metabolism, slightly improving its oral bioavailability. In addition, estrogen esters have increased lipophilicity, which results in a longer duration when given by intramuscular or subcutaneous injection due to the formation of a long-lasting local depot in muscle and fat. Conversely, this is not the case with intravenous injection or oral administration. Estrogen esters are rapidly hydrolyzed into their parent estrogen by esterases once they have been released from the depot. Because estradiol esters are prodrugs of estradiol, they are considered to be natural and bioidentical forms of estrogen.
Estradiol hexahydrobenzoate (EHHB), sold under a number of brand names including Benzo-Ginoestril A.P., BenzoGynoestryl Retard, Ginestryl-15-Depot, Menodin, and Tardoginestryl, is an estrogen medication which was previously used for indications such as menopausal hormone therapy and gynecological disorders. EHHB is given by injection into muscle at regular intervals, for instance once every few weeks.
Estradiol dienanthate (EDE), sold under the brand names Climacteron among others, is a long-acting estrogen medication which was previously used in menopausal hormone therapy for women and to suppress lactation in women. It was formulated in combination with estradiol benzoate (EB), a short-acting estrogen, and testosterone enanthate benzilic acid hydrazone (TEBH), a long-acting androgen/anabolic steroid. EDE has not been made available for medical use alone. The medication, in combination with EB and TEBH, was given by injection into muscle once or at regular intervals, for instance once every 6 weeks.
Estradiol benzoate butyrate (EBB), sold under the brand names Neolutin N, Redimen, Soluna, and Unijab and formerly known under the developmental code name Unimens, is an estrogen medication which is used in hormonal birth control for women. It is formulated in combination with dihydroxyprogesterone acetophenide, a progestin, and is used specifically as a combined injectable contraceptive. EBB is not available for medical use alone. The medication, in combination with DHPA, is given by injection into muscle once a month.
Estradiol (E2) is a medication and naturally occurring steroid hormone. It is an estrogen and is used mainly in menopausal hormone therapy and to treat low sex hormone levels in women. It is also used in hormonal birth control for women, in feminizing hormone therapy for transgender women, and in the treatment of hormone-sensitive cancers like prostate cancer in men and breast cancer in women, among other uses. Estradiol can be taken by mouth, held and dissolved under the tongue, as a gel or patch that is applied to the skin, in through the vagina, by injection into muscle or fat, or through the use of an implant that is placed into fat, among other routes.
The pharmacology of estradiol, an estrogen medication and naturally occurring steroid hormone, concerns its pharmacodynamics, pharmacokinetics, and various routes of administration.
Estradiol benzoate/progesterone (EB/P4), sold under the brand names Duogynon and Sistocyclin among others, is a combination medication of estradiol benzoate (EB), an estrogen, and progesterone (P4), a progestogen. It has been formulated both as short-acting oil solutions and long-acting microcrystalline aqueous suspensions and is given by injection into muscle either once or continuously at regular intervals.
Estradiol valerate/hydroxyprogesterone caproate (EV/OHPC), sold under the brand names Gravibinon and Injectable No. 1 among others, is a combined estrogen and progestogen medication which is used in the treatment of threatened miscarriage and other indications and as a form of combined injectable birth control to prevent pregnancy. It contains estradiol valerate (EV), an estrogen, and hydroxyprogesterone caproate (OHPC), a progestin. The medication is given by injection into muscle once a day to once a month depending on the indication.
Estradiol dipropionate/hydroxyprogesterone caproate (EDP/OHPC), sold under the brand name EP Hormone Depot, is a combined estrogen–progestogen medication which is used in Japan. It is manufactured by Teikoku Zoki Pharmaceutical Co., Tokyo and contains 1 mg/mL estradiol dipropionate and 50 mg/mL hydroxyprogesterone caproate.
Estradiol benzoate/estradiol dienanthate/testosterone enanthate benzilic acid hydrazone (EB/EDE/TEBH), sold under the brand names Climacteron, Lactimex, Lactostat, and Amenose, is an injectable combination medication of estradiol benzoate (EB), an estrogen, estradiol dienanthate (EDE), an estrogen, and testosterone enanthate benzilic acid hydrazone (TEBH), an androgen/anabolic steroid, which is used in menopausal hormone therapy for peri- and postmenopausal women and to suppress lactation in postpartum women. Clinical studies have assessed this formulation.
Estradiol benzoate/estradiol phenylpropionate (EB/EPP), sold under the brand name Dimenformon Prolongatum, is an injectable combination formulation of estradiol benzoate (EB), a shorter-acting estrogen, and estradiol phenylpropionate (EPP), a longer-acting estrogen, which has been used in menopausal hormone therapy for women in Europe but appears to no longer be available. It has also been used to suppress lactation in women and has been used in feminizing hormone therapy for transgender women. It has been provided in the form of 1 mL ampoules containing 2.5 mg EB and 10 mg EPP in oil solution and is administered by intramuscular injection at regular intervals.
Natural estrogens considered here include: [...] Esters of 17β-estradiol, such as estradiol valerate, estradiol benzoate and estradiol cypionate. Esterification aims at either better absorption after oral administration or a sustained release from the depot after intramuscular administration. During absorption, the esters are cleaved by endogenous esterases and the pharmacologically active 17β-estradiol is released; therefore, the esters are considered as natural estrogens.
The estradiol dipropionate used in this case was furnished by the Ciba Co. Their trade name for this product is Di-Ovocylin.
Grateful acknowledgment is made to Dr. Erwin Schwenk of the Schering Corporation for the estradiol benzoate (Progynon B), estradiol dipropionate (Progynon DP), progesterone (Proluton), and pregneninolone (Pranone) used in these experiments;
Intramuscular: For replacement therapy, (Estradiol, Estradiol Benzoate) 0.5 to 1.5 mg two or three times weekly; (Estradiol Cypionate) 1 to 5 mg weekly for two or three weeks; (Estradiol Dipropionate) 1 to 5 mg every one to two weeks; (Estradiol Valerate) 10 to 40 mg every one to four weeks.