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Voxelotor (Oral)

vox-EL-oh-tor

Medically reviewed by Drugs.com. Last updated on Jul 26, 2019.

Commonly used brand name(s)

In the U.S.

  • Oxbryta

Available Dosage Forms:

  • Tablet

Therapeutic Class: Blood Modifier Agent

Uses for voxelotor

Voxelotor is used to treat patients with sickle cell disease. Sickle cell disease is an inherited blood disorder in which the red blood cells are abnormally shaped (crescent or sickle shape), that resulted from a mutation in the gene for hemoglobin. Voxelotor works by keeping the hemoglobin in an oxygenated state, thus helping the red blood cells maintain a normal shape and preventing them from binding together and blocking the flow in the blood vessels.

Voxelotor is available only with your doctor's prescription.

Before using voxelotor

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 voxelotor, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to voxelotor 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 performed to date have not demonstrated pediatric-specific problems that would limit the usefulness of voxelotor in children 12 years of age and older. However, safety and efficacy have not been established in children younger than 12 years of age.

Geriatric

Appropriate studies on the relationship of age to the effects of voxelotor have not been performed in the geriatric population. However, no geriatric-specific problems have been documented to date.

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.

Interactions with medicines

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 voxelotor, 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 voxelotor 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.

  • Alfentanil
  • Apalutamide
  • Boceprevir
  • Bosentan
  • Carbamazepine
  • Clarithromycin
  • Cobicistat
  • Conivaptan
  • Cyclosporine
  • Dihydroergotamine
  • Dofetilide
  • Efavirenz
  • Enzalutamide
  • Ergotamine
  • Etravirine
  • Fentanyl
  • Flibanserin
  • Fluconazole
  • Fosphenytoin
  • Idelalisib
  • Indinavir
  • Itraconazole
  • Ketoconazole
  • Lopinavir
  • Lorlatinib
  • Lumacaftor
  • Mitotane
  • Modafinil
  • Nafcillin
  • Nefazodone
  • Nelfinavir
  • Oxycodone
  • Phenobarbital
  • Phenytoin
  • Pimavanserin
  • Pimozide
  • Posaconazole
  • Primidone
  • Quinidine
  • Rifabutin
  • Rifampin
  • Ritonavir
  • Saquinavir
  • Sirolimus
  • St John's Wort
  • Tacrolimus
  • Telaprevir
  • Telithromycin
  • Temsirolimus
  • Voriconazole

Interactions with food/tobacco/alcohol

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 voxelotor. Make sure you tell your doctor if you have any other medical problems, especially:

  • Liver problems, severe—Use with caution. The effects may be increased because of slower removal of the medicine from the body.

Proper use of voxelotor

Take voxelotor exactly as directed by your doctor. Do not take more of it and do not take it more often than your doctor ordered. Voxelotor is for a long-term treatment.

Voxelotor usually comes with patient information leaflet. Read and follow the instructions carefully and make sure you understand them before taking voxelotor. If you have any questions, ask your doctor.

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

Take voxelotor at the same time each day, with or without food.

Your doctor may want you to take hydroxyurea (Hydrea®) while you are taking voxelotor.

Dosing

The dose of voxelotor 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 voxelotor. 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 sickle cell disease:
      • Adults and children 12 years of age and older—1,500 milligrams (mg) once a day.
      • Children younger than 12 years of age—Use and dose must be determined by your doctor.

Missed dose

If you miss a dose of voxelotor, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

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 while using voxelotor

It is very important that your doctor check your or your child's progress at regular visits to make sure that voxelotor is working properly. Blood tests may be needed to check for unwanted effects.

Voxelotor may cause allergic reactions. Tell your doctor right away if you have a rash or itching skin, chest pain, fever or chills, mild swelling of the face, trouble breathing, or unusual tiredness or weakness while using voxelotor.

Do not change your dose or stop taking voxelotor without checking first with your doctor.

Before you have any medical tests, tell the medical doctor in charge that you are taking voxelotor. The results of some tests may be affected by voxelotor.

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.

Voxelotor 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:

Rare

  • Black, tarry stools
  • chest pain
  • chills
  • cough
  • fever
  • hives or welts, itching or skin rash
  • painful or difficult urination
  • redness of the skin
  • sore throat
  • sores, ulcers, or white spots on the lips or in the mouth
  • swelling of the face
  • swollen glands
  • trouble breathing
  • unusual bleeding or bruising
  • unusual tiredness or weakness

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

  • Diarrhea
  • headache
  • nausea
  • stomach pain

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.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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