Description and Brand Names

Drug information provided by: IBM Micromedex

US Brand Name

  1. Xospata

Descriptions


Gilteritinib is used to treat acute myeloid leukemia with an FMS-like tyrosine kinase 3 (FLT3) mutation that has come back or has not improved after previous treatments. Your doctor will test for the presence of this mutation.

This medicine is available only with your doctor's prescription.

This product is available in the following dosage forms:

  • Tablet

Before Using

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of gilteritinib in the pediatric population. Safety and efficacy have not been established.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of gilteritinib in the elderly.

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Apalutamide
  • Capmatinib
  • Carbamazepine
  • Fosphenytoin
  • Phenytoin
  • Rifampin
  • St John's Wort

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Heart or heart rhythm problems (eg, QT prolongation)—Use with caution. May make this condition worse.
  • Hypokalemia (low potassium levels in the blood) or
  • Hypomagnesemia (low magnesium levels in the blood)—Must be corrected first before using this medicine.

Proper Use

Medicines used to treat cancer are very strong and can have many side effects. Before using this medicine, make sure you understand all the risks and benefits. It is important for you to work closely with your doctor during your treatment.

Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered.

This medicine comes with a Medication Guide. Read and follow these instructions carefully. Ask your doctor if you have any questions.

You may take this medicine with or without food.

Swallow the tablet whole with water. Do not break, crush, or chew it.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For oral dosage form (tablets):
    • For acute myeloid leukemia:
      • Adults—120 milligrams (mg) once a day. Your doctor may adjust your dose as needed and tolerated.
      • Children—Use and dose must be determined by your doctor.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

If you miss a dose and it is less than 12 hours until your next regular dose, skip the missed dose and take your next dose at the regular time. If you miss a dose and it is 12 hours or more until your next dose, take the missed dose then go back to your regular schedule.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Precautions

It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.

Using this medicine while you are pregnant can harm your unborn baby. It may also cause birth defects if the father is using it when his sexual partner becomes pregnant. Female patients should use effective birth control during treatment with this medicine and for at least 6 months after the last dose. Male patients who have female partners should use effective birth control during treatment with this medicine and for at least 4 months after the last dose. If you think you have become pregnant while using this medicine, tell your doctor right away.

Your doctor will give you a pregnancy test within 7 days before you use this medicine to make sure you are not pregnant.

Using this medicine may increase your risk of having a condition called differentiation syndrome, which may be life-threatening. It may occur as early as 2 days after starting this medicine and during the first 3 months of treatment. Check with your doctor right away if you start to have a fever, cough, troubled breathing, swelling of the arms or legs or around the neck, groin, or underarms, rapid weight gain, or bone pain.

Tell your doctor right away if you have seizures, headache, confusion, vision problems, unusual drowsiness, tiredness, or weakness. These could be symptoms of a serious nervous system problem called posterior reversible encephalopathy syndrome (PRES).

Contact your doctor right away if you have any changes to your heart rhythm. You might feel dizzy or faint, or you might have a fast, pounding, or uneven heartbeat. Make sure your doctor knows if you had a heart rhythm problem, such as QT prolongation.

Check with your doctor right away if you have loss of appetite, nausea, or pains in stomach, side, or abdomen, possibly radiating to the back. These could be symptoms of pancreatitis (swelling of the pancreas).

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

More common

  1. Bloody urine
  2. blurred vision
  3. chest pain
  4. chills
  5. confusion
  6. cough
  7. decreased frequency or amount of urine
  8. dizziness
  9. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  10. fainting
  11. fast or irregular heartbeat
  12. fever
  13. headache
  14. increased thirst
  15. lightheadedness
  16. loss of appetite
  17. lower back or side pain
  18. nausea
  19. nervousness
  20. pounding in the ears
  21. rapid, shallow breathing
  22. recurrent fainting
  23. slow heartbeat
  24. sneezing
  25. sore throat
  26. stomach pain
  27. sweating
  28. swelling of the face, fingers, or lower legs
  29. tightness in the chest
  30. troubled breathing
  31. unusual tiredness or weakness
  32. vomiting
  33. weight gain

Less common

  1. Anxiety
  2. blue or pale skin
  3. chest discomfort
  4. chest pain, possibly moving to the left arm, neck, or shoulder
  5. difficulty swallowing
  6. dilated neck veins
  7. extreme tiredness or weakness
  8. hives, itching, skin rash
  9. irregular breathing
  10. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  11. seizures
  12. unusual drowsiness
  13. vision problems

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

  1. Change in taste
  2. constipation
  3. decreased appetite
  4. diarrhea
  5. loss of taste
  6. muscle or joint pain
  7. swelling or inflammation of the mouth
  8. trouble sleeping

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.