What is "allylestrenol"

alt. A synthetic progestogen used to prevent threatened miscarriage, recurrent pregnancy loss and premature labour. n. A synthetic progestogen used to prevent threatened miscarriage, recurrent pregnancy loss and premature labour.

Allylestrenol ( INN) (brand names Gestanon, Gestanin, Turinal, others), or allyloestrenol ( BAN), also known as 17α-allylestr-4-en-17β-ol, is a steroidal progestin of the 19-nortestosterone group that is used to prevent threatened miscarriage, recurrent pregnancy loss and premature labor. It has been marketed widely throughout Europe, including in the United Kingdom (no longer available), Russia, and many other European countries, and also is or has been available in Japan, Hong Kong, India, Bangladesh, Indonesia, and much of Southeast Asia, though notably not the United States or Canada. In addition to its pregnancy-related uses, allylestrenol has also been studied as a treatment for benign prostatic hyperplasia in men, with encouraging results. The drug is said to be virtually devoid of androgenic, estrogenic, or glucocorticoid activity, and hence appears to be a pure progestogen with similar effects to those of progesterone. It was patented in 1958, and has been marketed since 1961.