allylestrenol
Sign in to saveAllylestrenol, sold under the brand names Gestanin and Turinal among others, is a progestin medication which is used to treat recurrent and threatened miscarriage and to prevent premature labor in pregnant women. However, except in the case of proven progesterone deficiency, its use for such purposes is no longer recommended. A Cochrane review in 2025 found that it had little to no effect in subsequent pregnancy outcomes for women with unexplained, recurrent miscarriage. It is also used in Japan to treat benign prostatic hyperplasia (BPH) in men. The medication is used alone and is not formula
Article
17 sectionsContents
- Medical uses
- Available forms
- Side effects
- Pharmacology
- Pharmacodynamics
- Progestogenic and off-target activities
- Antigonadotropic effects
- Other activities
- Pharmacokinetics
- Chemistry
- Synthesis
- History
- Society and culture
- Generic names
- Brand names
- Availability
- References
Allylestrenol, sold under the brand names Gestanin and Turinal among others, is a progestin medication which is used to treat recurrent and threatened miscarriage and to prevent premature labor in pregnant women. However, except in the case of proven progesterone deficiency, its use for such purposes is no longer recommended. A Cochrane review in 2025 found that it had little to no effect in subsequent pregnancy outcomes for women with unexplained, recurrent miscarriage. It is also used in Japan to treat benign prostatic hyperplasia (BPH) in men. The medication is used alone and is not formulated in combination with an estrogen. It is taken by mouth.
Side effects of allylestrenol are few and have not been well-defined, but are assumed to be similar to those of related medications. Allylestrenol is a progestin, or a synthetic progestogen, and hence is an agonist of the progesterone receptor, the biological target of progestogens like progesterone. It has no other important hormonal activity. The medication is a prodrug of 17α-allyl-19-nortestosterone (3-ketoallylestrenol) in the body.