abiraterone (Oral route)

Pronunciation

a-bir-A-ter-one AS-e-tate

Commonly used brand name(s)

In the U.S.

  • Zytiga

Available Dosage Forms:

  • Tablet

Therapeutic Class: Antiandrogen

Uses For abiraterone

Note: Women of childbearing potential should not use or handle abiraterone tablets without protection (e.g., gloves).

Abiraterone is used in combination with prednisone to treat patients with metastatic castration-resistant prostate cancer (prostate cancer that is resistant to medical or surgical treatments that lower testosterone and has already spread to other parts of the body). abiraterone is used in patients who have received cancer treatments, such as docetaxel.

Slideshow: Flashback: FDA Drug Approvals 2013

abiraterone is available only with your doctor's prescription.

Before Using abiraterone

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 abiraterone, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to abiraterone 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

Abiraterone is not indicated for use 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 abiraterone in the elderly.

Pregnancy

Pregnancy Category Explanation
All Trimesters X Studies in animals or pregnant women have demonstrated positive evidence of fetal abnormalities. This drug should not be used in women who are or may become pregnant because the risk clearly outweighs any possible benefit.

Breast Feeding

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 abiraterone, 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 abiraterone with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Agomelatine
  • Lomitapide

Using abiraterone 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.

  • Afatinib
  • Amiodarone
  • Carbamazepine
  • Clozapine
  • Dabigatran Etexilate
  • Dabrafenib
  • Doxorubicin
  • Doxorubicin Hydrochloride Liposome
  • Enzalutamide
  • Eslicarbazepine Acetate
  • Everolimus
  • Fentanyl
  • Flecainide
  • Fluoxetine
  • Fosphenytoin
  • Hydrocodone
  • Ibrutinib
  • Lurasidone
  • Mitotane
  • Morphine
  • Morphine Sulfate Liposome
  • Nilotinib
  • Ospemifene
  • Oxycodone
  • Paclitaxel
  • Phenobarbital
  • Phenytoin
  • Piperaquine
  • Pixantrone
  • Pomalidomide
  • Primidone
  • Repaglinide
  • Rifabutin
  • Rifampin
  • Rifapentine
  • Romidepsin
  • Rosiglitazone
  • Siltuximab
  • Simeprevir
  • St John's Wort
  • Tamoxifen
  • Tasimelteon
  • Thioridazine
  • Topotecan
  • Trabectedin
  • Vilazodone
  • Vortioxetine

Using abiraterone with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Dextromethorphan
  • Pioglitazone

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

  • Adrenal or pituitary problems, history of or
  • Heart attack, recent or
  • Heart failure or
  • Heart or blood vessel disease, history of or
  • Heart rhythm problems (e.g., ventricular arrhythmia) or
  • Hypertension (high blood pressure) or
  • Hypokalemia (low potassium in the blood)—Use with caution. May make these conditions worse.
  • Liver disease—Use with caution. The effects may be increased because of slower removal of the medicine from the body.

Proper Use of abiraterone

Take abiraterone only as directed by your doctor to benefit your condition as much as possible. 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.

abiraterone comes with a patient information leaflet. Read the information carefully and make sure you understand it before taking abiraterone. If you have any questions, ask your doctor.

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

It is best to take abiraterone on an empty stomach. Do not eat 2 hours before or 1 hour after taking abiraterone.

Dosing

The dose of abiraterone 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 abiraterone. 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 castration-resistant prostate cancer:
      • Adults—1000 milligrams (mg) (four 250-mg tablets) once a day, taken together with 5 mg oral prednisone two times a day.
      • Children—Use is not recommended.

Missed Dose

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

If you missed a dose of abiraterone, take your normal dose on the following day. If more than one daily dose is missed, call your doctor.

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 abiraterone

It is very important that your doctor check you at regular visits to make sure that abiraterone is working properly. Blood tests will be needed to check for any unwanted effects that may be caused by abiraterone.

Women and children should not use abiraterone. Pregnant women or women who may become pregnant should not handle or touch the tablets without protection (e.g., gloves). abiraterone may also cause birth defects if the father is using it when his sexual partner becomes pregnant. You must use a condom and another effective method of birth control during and for 1 week after the last dose of abiraterone. If a pregnancy occurs while you are using abiraterone, tell your doctor right away.

You will also need to have your blood pressure measured before starting abiraterone and while you are using it. If you notice any change to your recommended blood pressure, call your doctor right away. If you have questions about this, talk to your doctor.

Do not interrupt or stop using abiraterone together with prednisone without asking your doctor. This may increase your risk of having adrenal gland problems. Talk to your doctor if you have more than one of these symptoms while you are using abiraterone: darkening of the skin, diarrhea, dizziness, fainting, loss of appetite, mental depression, nausea, skin rash, unusual tiredness or weakness, or vomiting.

Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, unusual tiredness or weakness, or yellow eyes or skin. These could be symptoms of a serious liver problem.

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.

abiraterone 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
  • Bladder pain
  • bloating or swelling of the face, arms, hands, lower legs, or feet
  • bloody or cloudy urine
  • blurred vision
  • bone fracture
  • chest pain or discomfort
  • convulsions
  • decreased urine
  • difficult, burning, or painful urination
  • dizziness
  • dry mouth
  • fainting
  • fast, pounding, or irregular heartbeat or pulse
  • feeling of warmth
  • frequent urge to urinate
  • headache
  • increased need to urinate
  • increased thirst
  • increased urge to urinate during the night
  • lightheadedness, dizziness, or fainting
  • loss of appetite
  • lower back or side pain
  • mood changes
  • muscle pain or cramps
  • nausea or vomiting
  • nervousness
  • numbness or tingling in the hands, feet, or lips
  • pain or swelling in the arms or legs without any injury
  • passing urine more often
  • pounding in the ears
  • rapid weight gain
  • redness of the face, neck, arms, and occasionally, upper chest
  • shortness of breath
  • slow heartbeat
  • sudden sweating
  • swelling
  • swelling with pits or depressions on the skin
  • unusual tiredness or weakness
  • unusual weight gain or loss
  • waking to urinate at night
Less common
  • Abdominal or stomach pain or tenderness
  • arm, back, or jaw pain
  • chest tightness or heaviness
  • clay colored stools
  • cool, sweaty skin
  • dark urine
  • decreased appetite
  • decreased urine output
  • difficulty with breathing
  • dilated neck veins
  • extreme fatigue
  • fever
  • headache
  • irregular breathing
  • itching skin
  • rash
  • sweating
  • swelling of the face, fingers, feet, or lower legs
  • weakness
  • weight gain
  • wheezing
  • yellow eyes or skin
Rare
  • Darkening of the skin
  • diarrhea
  • mental depression

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
  • Acid or sour stomach
  • belching
  • body aches or pain
  • chills
  • cough
  • difficulty with moving
  • ear congestion
  • heartburn
  • indigestion
  • joint pain
  • loss of voice
  • muscle cramps or spasms
  • muscle or bone pain
  • muscle stiffness
  • nasal congestion
  • runny nose
  • sneezing
  • sore throat
  • stomach discomfort or upset
  • swelling or stiffness of the joints

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.

See also: Side effects (in more detail)

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