What is allylestrenol?


Generic Name: Allylestrenol Brand Name(s): Generics only. No brands available.

Know the basics

What is allylestrenol used for?

Allylestrenol is a synthetic progestogen, prescribed for the prevention of threatened miscarriage and recurrent pregnancy loss.  Allylestrenol belongs to class called contraceptive Hormone replacement.

How should I take allylestrenol?

Take allylestrenol by mouth as directed, it can be taken with or without food. You can this medication with food to prevent GI upset. Follow all directions on the product package. If you are uncertain about any of the information, consult your doctor or pharmacist.

Tell your doctor if your condition persists or worsens or if you develop new symptoms. If you think you may have a serious medical problem, get medical help right away.

How do I store allylestrenol?

Allylestrenol is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store allylestrenol in the bathroom or the freezer. There may be different brands of allylestrenol that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush allylestrenol down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Know the precautions & warnings

What should I know before using allylestrenol?

Before using allylestrenol:

  • Tell your doctor and pharmacist if you are allergic to it or any other drugs.
  • Tell your doctor and pharmacist what prescription and nonprescription drugs you are taking, including vitamins.
  • Tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding.
  • Tell your doctor if you have hrombophleobitis; undiagnosed vag bleeding, incomplete abortion, hormone-dependent carcinoma, cerebral apoplexy; severe hepatic impairment.

Is it safe to take allylestrenol during pregnancy or breast-feeding?

There are no adequate studies in women for determining risk when using this medication during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking this medication. This medication is pregnancy risk category C according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk,
  • B=No risk in some studies,
  • C=There may be some risk,
  • D=Positive evidence of risk,
  • X=Contraindicated,
  • N=Unknown.

Know the side effects

What are the side effects of allylestrenol?

Side effects include:

  • GI disturbances;
  • Appetite/weight change;
  • Fluid retention;
  • Oedema;
  • Acnes;
  • Skin rash;
  • Urticarial;
  • Depression;
  • Headache;
  • Fever;
  • Fatigue;
  • Breast changes;
  • Hirsutism;
  • Changes in libido;
  • Altered menstrual cycles or irregular menstrual bleeding (rare).

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.

Know the interactions

What drugs may interact with allylestrenol?

Allylestrenol may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, non-prescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

  • Enzyme-inducing drugs eg, carbamazepine, griseofulvin, phenobarbital, phenytoin and rifampicin.
  • Ketoconazole.

Does food or alcohol interact with allylestrenol?

Allylestrenol may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with allylestrenol?

Allylestrenol may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have, especially:

  • Migraine and embolic disorders;
  • Epilepsy;
  • Migraine;
  • Asthma;
  • Cardiac or renal dysfunction;
  • History of depression;
  • Glucose tolerance;
  • Diabetes.

Understand the Dosage

The information provided is not a substitute for medical advice. Always consult your doctor or pharmacist before using this medication.

What is the dose of Allylestrenol for an adult?

Threatened miscarriage
Adult: 5 mg orally three times a day for 5-7 days.

What is the dose of Allylestrenol for a child?

The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.

How is allylestrenol available?

Allylestrenol is available in the following dosage forms and strengths:

Tablet, Oral: 5 mg.

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of allylestrenol , take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.

Review Date: May 30, 2016 | Last Modified: January 4, 2017

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