Description
Quizartinib is used in combination with other medicines (eg, cytarabine, anthracycline) and alone as maintenance therapy to treat acute myeloid leukemia in patients with a FLT3-ITD mutation. Your doctor will test for the presence of this mutation.
This medicine is available only under a restricted distribution program called Vanflyta® REMS (Risk Evaluation and Mitigation Strategy) Program.
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 quizartinib 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 quizartinib 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.
- Adagrasib
- Alfuzosin
- Amiodarone
- Amisulpride
- Amitriptyline
- Anagrelide
- Apalutamide
- Apomorphine
- Aripiprazole
- Aripiprazole Lauroxil
- Arsenic Trioxide
- Asenapine
- Astemizole
- Atazanavir
- Atovaquone
- Avacopan
- Azithromycin
- Bedaquiline
- Bepridil
- Boceprevir
- Bosentan
- Buprenorphine
- Buserelin
- Carbamazepine
- Cenobamate
- Ceritinib
- Chloroquine
- Chlorpromazine
- Ciprofloxacin
- Cisapride
- Citalopram
- Clarithromycin
- Clofazimine
- Clomipramine
- Clozapine
- Cobicistat
- Conivaptan
- Crizotinib
- Cyclobenzaprine
- Dabrafenib
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 disease or
- Heart rhythm problems—Use with caution. May make these conditions worse.
- Heart rhythm problems (eg, long QT syndrome, torsades de pointes, ventricular arrhythmia), history of or
- Hypokalemia (low potassium levels in the blood), severe or
- Hypomagnesemia (low magnesium levels in the blood), severe—Should not be used in patients with these conditions.
- Patients who have had allogeneic hematopoietic stem cell transplant (HSCT)—Should not be used alone as maintenance treatment after receiving HSCT.
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.
It is very important that you understand the requirements of the Vanflyta® REMS program and Medication Guide. Read and follow these instructions carefully. Ask your doctor if you have any questions. Ask your pharmacist for the medication guide if you do not have one.
You may take this medicine with or without food. Take this medicine at the same time each day.
Swallow the tablet whole. Do not cut, 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—At first, 35.4 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.
- For acute myeloid leukemia:
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 vomit after taking a dose of this medicine, do not take an additional dose. Take the next dose at the regular time.
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 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. Your doctor will give you a pregnancy test within 7 days before you use this medicine to make sure you are not pregnant. Female patients should use effective birth control during treatment with this medicine and for at least 7 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.
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 (eg, QT prolongation, torsade de pointes).
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 (eg, St John's wort) 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
- Black, tarry stools
- bleeding gums
- blood in the urine or stools
- body aches or pain
- burning or stinging of the skin
- chills
- confusion
- cough
- dizziness
- ear congestion
- fainting
- fast heartbeat
- fever
- headache
- lightheadedness
- loss of voice
- lower back or side pain
- painful cold sores or blisters on lips, nose, eyes, or genitals
- painful or difficult urination
- pale skin
- pinpoint red spots on the skin
- stuffy or runny nose
- trouble breathing
- ulcers, sores, or white spots in the mouth
- unusual bleeding or bruising
- unusual tiredness or weakness
Incidence not known
- Chest pain or discomfort
- irregular or slow heart rate
- no blood pressure
- stopping of the heart
- unconsciousness
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
- Cracked lips
- diarrhea
- difficulty in swallowing
- eye redness, irritation, or pain
- nausea
- red, sore eyes
- stomach pain
- trouble sleeping
- vomiting
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.
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