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Allylestrenol is used to treat intrauterine growth retardation (poor growth of a fetus while in the mother's womb during pregnancy), threatened abortion (vaginal bleeding that occurs in the first 20 weeks of pregnancy), habitual abortion (three or more consecutive pregnancy losses before 20 weeks of gestation) and threatened premature delivery.

How it works

Allylestrenol is a synthetic progesterone derivative. It stimulates the synthesis of body’s placental progesterone, increasing the secretion of placental hormones and hence averting the risk of abortion.

Common side effects

Stomach pain, Nausea, Vomiting, Gastrointestinal disorder


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Expert advice

  • Caution is to be exercised by patients with heart disease, congestive heart failure, coronary artery disease, fits, kidney failure, migraine, asthma, obstructive airways disease, inflammation of airways.
  • Tell your doctor if you are or planning to become pregnant or are breastfeeding.
  • You should discontinue allylestrenol after delivery, as it may affect the baby.

Frequently asked questions


Q. Is allylestrenol safe?
Allylestrenol is safe if taken at prescribed dose and duration as advised by your doctor.

Content on this page was last updated on 30 September, 2016, by Dr. Varun Gupta (MD Pharmacology)