Estradiol benzoate butyrate

Not to be confused with Estradiol benzoate or Estradiol enantate.
Estradiol benzoate butyrate
Clinical data
Trade namesNeolutin N, Redimen, Soluna, Unijab (all combinations)
Other namesEBB; Estradiol 3-benzoate 17β-n-butyrate; Estra-1,3,5(10)-triene-3,17β-diol 3-benzoate 17β-n-butyrate
Routes of
administration		Intramuscular injection
Drug classEstrogen; Estrogen ester
Identifiers
  • [(8R,9S,13S,14S,17S)-17-butanoyloxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-3-yl] benzoate
CAS Number
PubChem CID
ChemSpider
UNII
CompTox Dashboard (EPA)
ECHA InfoCard100.057.989 Edit this at Wikidata
Chemical and physical data
FormulaC29H34O4
Molar mass446.587 g·mol−1
3D model (JSmol)
  • CCCC(=O)O[C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CCC4=C3C=CC(=C4)OC(=O)C5=CC=CC=C5)C
  • InChI=1S/C29H34O4/c1-3-7-27(30)33-26-15-14-25-24-12-10-20-18-21(32-28(31)19-8-5-4-6-9-19)11-13-22(20)23(24)16-17-29(25,26)2/h4-6,8-9,11,13,18,23-26H,3,7,10,12,14-17H2,1-2H3/t23-,24-,25+,26+,29+/m1/s1
  • Key:MKYFGNOOEKZNPW-ZRJUGLEFSA-N

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.[1][2] It is formulated in combination with dihydroxyprogesterone acetophenide (DHPA; algestone acetophenide), a progestin, and is used specifically as a combined injectable contraceptive.[1][2] EBB is not available for medical use alone.[3] The medication, in combination with DHPA, is given by injection into muscle once a month.[1][2]

Side effects of EBB include breast tenderness, breast enlargement, nausea, headache, and fluid retention.[4] EBB is an estrogen and hence is an agonist of the estrogen receptor, the biological target of estrogens like estradiol.[5][6] It is an estrogen ester and a prodrug of estradiol in the body.[6][5] Because of this, it is considered to be a natural and bioidentical form of estrogen.[6]

EBB was first described in 1938.[7] It was developed for use as a form of birth control in the 1970s[8][1] and was introduced for medical use for this indication by the 1980s.[9][10] The medication is used in combination with DHPA as a combined injectable contraceptive in Peru and Singapore.[11][12]

  1. ^ a b c d Toppozada M (June 1977). "The clinical use of monthly injectable contraceptive preparations". Obstetrical & Gynecological Survey. 32 (6): 335–347. doi:10.1097/00006254-197706000-00001. PMID 865726.
  2. ^ a b c Toppozada MK (1983). "Monthly Injectable Contraceptives". In Alfredo Goldsmith, Mokhtar Toppozada (eds.). Long-Acting Contraception. pp. 93–103. OCLC 35018604.
  3. ^ "Estradiol: Uses, Dosage & Side Effects".
  4. ^ Ghosh AK (23 September 2010). Mayo Clinic Internal Medicine Board Review. OUP USA. pp. 222–. ISBN 978-0-19-975569-1.
  5. ^ a b Kuhl H (August 2005). "Pharmacology of estrogens and progestogens: influence of different routes of administration". Climacteric. 8 (Suppl 1): 3–63. doi:10.1080/13697130500148875. PMID 16112947. S2CID 24616324.
  6. ^ a b c Kuhnz W, Blode H, Zimmermann H (6 December 2012). "Pharmacokinetics of Exogenous Natural and Synthetic Estrogens and Antiestrogens". In Oettel M, Schillinger E (eds.). Estrogens and Antiestrogens II: Pharmacology and Clinical Application of Estrogens and Antiestrogen. Handbook of Experimental Pharmacology. Vol. 135 / 2. Springer Science & Business Media. pp. 261–322. doi:10.1007/978-3-642-60107-1_15. ISBN 978-3-642-60107-1. 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.
  7. ^ Cite error: The named reference pmid16746680 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference pmid12290848 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference BonnemaDalebout1992 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference ThomasMolina1989 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference HumansOrganization2007 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference HumansCancer1999 was invoked but never defined (see the help page).