Estradiol benzoate/testosterone isobutyrate (EB/TiB), sold under the brand names Femandren M and Folivirin, is an injectable combination medication of

estradiol benzoate 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 ...

(EB), an estrogen, and testosterone isobutyrate (TiB), an androgen/

anabolic steroid Anabolic steroids, also known more properly as anabolic–androgenic steroids (AAS), are steroidal androgens that include natural androgens like testosterone (medication), testosterone as well as synthetic androgens that are structurally related ...

, which is used in menopausal hormone therapy for women. It is provided in the form of 1 mL ampoules containing 2.5 mg estradiol benzoate and 25 mg testosterone isobutyrate in a microcrystalline

aqueous suspension In chemistry, a suspension is a Mixture#Homogeneous and heterogeneous mixtures, heterogeneous mixture of a fluid that contains solid particles sufficiently large for sedimentation. The particles may be macroscopic, visible to the naked eye, usual ...

and is administered by

intramuscular injection Intramuscular injection, often abbreviated IM, is the injection of a substance into a muscle. In medicine, it is one of several methods for parenteral administration of medications. Intramuscular injection may be preferred because muscles have ...

once every 4 to 6 weeks. EB/TiB reportedly has a

duration Duration may refer to: * The amount of time elapsed between two events * Duration (music) – an amount of time or a particular time interval, often cited as one of the fundamental aspects of music * Duration (philosophy) – a theory of time and ...

of about 14 to 21 days. The medication is available only in the Czech Republic and Slovakia. EB/TiB was originally developed and marketed by the

Swiss Swiss may refer to: * the adjectival form of Switzerland * Swiss people Places * Swiss, Missouri * Swiss, North Carolina *Swiss, West Virginia * Swiss, Wisconsin Other uses *Swiss-system tournament, in various games and sports *Swiss Internation ...

pharmaceutical company Ciba and was introduced for medical use by 1953, following the development of testosterone isobutyrate in 1952. It was intermittently manufactured by Spofa and then Biotika and is now manufactured by BB Pharma. The effect of EB/TiB on gonadotropin levels in postmenopausal women have been studied. An oral

tablet Tablet may refer to: Medicine * Tablet (pharmacy), a mixture of pharmacological substances pressed into a small cake or bar, colloquially called a "pill" Computing * Tablet computer, a mobile computer that is primarily operated by touching the s ...

product with the same brand name of Femandren, containing ethinylestradiol and

methyltestosterone Methyltestosterone, sold under the brand names Android, Metandren, and Testred among others, is an androgen and anabolic steroid (AAS) medication which is used in the treatment of low testosterone levels in men, delayed puberty in boys, at low ...

, was marketed around the same time as Femandren M, and should not be confused with the injectable formulation.

References

Combined estrogen–androgen formulations {{Genito-urinary-drug-stub

See also

References