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Generic Name: enasidenib (EN a SID a nib)
Brand Names: IDHIFA

What is IDHIFA?

IDHIFA (enasidenib) works by blocking the function of a certain protein that has become mutated in white blood cells. This mutation keeps the blood cells from growing and functioning normally, and the build-up of these abnormal cells can lead to acute myeloid leukemia.

IDHIFA is used to treat acute myeloid leukemia in adults who have a mutation in the protein that this medicine targets and blocks.

IDHIFA is usually given after other medicines have been tried without success.

Important information

IDHIFA can cause a condition called differentiation syndrome, which affects blood cells and can be fatal if not treated. This condition may occur within 10 days to 5 months after you start taking this medicine.

Seek medical help right away if you have symptoms of differentiation syndrome: fever, cough, trouble breathing, bone pain, rapid weight gain, or swelling in your arms, legs, underarms, groin, or neck.

Before taking this medicine

You should not use IDHIFA if you are allergic to enasidenib.

Before using IDHIFA tell your doctor about all your medical conditions or allergies.

You may need to have a negative pregnancy test before starting this treatment. In animal studies, enasidenib caused miscarriage, low birth weight, stillbirth, and birth defects.

Enasidenib may harm an unborn baby. Use a barrier form of birth control (condom or diaphragm with spermicide) to prevent pregnancy while you are using IDHIFA. Hormonal contraception (birth control pills, injections, implants, skin patches, and vaginal rings) may not be effective enough to prevent pregnancy during your treatment.

You should use birth control to prevent pregnancy while using this medicine whether you are a man or a woman. IDHIFA use by either parent may cause birth defects.

Keep using birth control for at least 1 month after your last dose of IDHIFA. Tell your doctor right away if a pregnancy occurs while either the mother or the father is using enasidenib.

IDHIFA may affect fertility (ability to have children) in both men and women. However, it is important to use birth control to prevent pregnancy because enasidenib may harm the baby if a pregnancy does occur.

It is not known whether enasidenib passes into breast milk or if it could harm a nursing baby. You should not breast-feed while using this medicine, and for at least 1 month after your last dose.

How should I take IDHIFA?

Take IDHIFA exactly as prescribed by your doctor. Follow all directions on your prescription label. Do not use this medicine in larger or smaller amounts or for longer than recommended.

Take IDHIFA exactly as prescribed by your doctor. IDHIFA is usually given once per day. Take this medicine with a full glass of water, at the same time each day. Drink plenty of liquids while you are taking this medicine.

You may take this medicine with or without food.

Do not crush, chew, or break a tablet. Swallow the tablet whole.

IDHIFA is usually given until your body no longer responds to the medication.

If you vomit shortly after taking your dose, take another dose as soon as possible. Then take your next dose at the regularly scheduled time.

You may need frequent medical tests to be sure this medicine is not causing harmful effects. Your cancer treatments may be delayed based on the results of these tests.

Store at room temperature away from moisture and heat. Keep the tablets in their original container, along with the canister of moisture-absorbing preservative.

Usual Adult Dose for Acute Myeloid Leukemia:

100 mg orally once a day with or without food

Duration of Therapy:
-Treat until disease progression or unacceptable toxicity.
-For patients without disease progression or unacceptable toxicity, treat for a minimum of 6 months to allow time for clinical response.

Comments: Select patients based on the presence of isocitrate dehydrogenase-2 (IDH2) mutations in the blood or bone marrow as detected by an FDA-approved test,

Use: Treatment of relapsed or refractory acute myeloid leukemia (AML) with an IDH2 mutation.

See also: Dosage Information (in more detail)

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking IDHIFA?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

IDHIFA side effects

Get emergency medical help if you have signs of an allergic reaction to IDHIFA: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

IDHIFA can cause a condition called differentiation syndrome, which affects blood cells and can be fatal if not treated. This condition may occur within 10 days to 5 months after you start taking IDHIFA.

Seek medical help right away if you have symptoms of differentiation syndrome:

  • fever, cough, trouble breathing;

  • bone pain;

  • rapid weight gain; or

  • swelling in your arms, legs, underarms, groin, or neck.

Call your doctor at once if you have any of these side effects:

  • dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);

  • severe or ongoing vomiting or diarrhea; or

  • signs of tumor cell breakdown - vomiting, diarrhea; little or no urination; numbness or tingly feeling; muscle weakness or twitching; fast or slow heart rate; confusion, hallucinations, seizure, feeling restless or irritable.

Common IDHIFA side effects may include:

  • nausea, vomiting, diarrhea;

  • loss of appetite; or

  • jaundice.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

What other drugs will affect IDHIFA?

Other drugs may interact with enasidenib, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.

Where can I get more information?

  • Your pharmacist can provide more information about IDHIFA.
  • Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use IDHIFA only for the indication prescribed.
  • Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2018 Cerner Multum, Inc. Version: 1.01.

Date modified: September 05, 2017
Last reviewed: August 07, 2017