Skip to main content

Enzalutamide (Oral route)

Pronunciation:

en-za-LOO-ta-mide

Brand Names:

  • Xtandi

Dosage Forms:

  • Capsule, Liquid Filled

Classifications:

Therapeutic—

Antineoplastic Agent

Uses of This Medicine:

Enzalutamide is used to treat metastatic (cancer that has spread) prostate cancer. It works to stop the growth of cancer cells by blocking the effects of androgen hormones (eg, testosterone). Enzalutamide is an antiandrogen cancer medicine.

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

Before Using This Medicine:

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.

Children—

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

Older adults—

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

Pregnancy—

Pregnancy CategoryExplanation
All TrimestersXStudies 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.

Other 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 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 not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Artemether
  • Atazanavir
  • Boceprevir
  • Daclatasvir
  • Delamanid
  • Lumefantrine
  • Lurasidone
  • Maraviroc

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.

  • Abiraterone Acetate
  • Alfentanil
  • Apremilast
  • Aripiprazole
  • Bedaquiline
  • Bosentan
  • Cabozantinib
  • Carbamazepine
  • Ceritinib
  • Clarithromycin
  • Clozapine
  • Cobicistat
  • Conivaptan
  • Crizotinib
  • Cyclosporine
  • Dabrafenib
  • Deferasirox
  • Dexamethasone
  • Dihydroergotamine
  • Dolutegravir
  • Doxorubicin
  • Doxorubicin Hydrochloride Liposome
  • Efavirenz
  • Eliglustat
  • Elvitegravir
  • Ergotamine
  • Erlotinib
  • Eslicarbazepine Acetate
  • Etravirine
  • Everolimus
  • Exemestane
  • Fentanyl
  • Fosphenytoin
  • Gemfibrozil
  • Hydrocodone
  • Ibrutinib
  • Idelalisib
  • Indinavir
  • Itraconazole
  • Ivabradine
  • Ketoconazole
  • Lopinavir
  • Macitentan
  • Mephenytoin
  • Mitotane
  • Modafinil
  • Nafcillin
  • Nefazodone
  • Nelfinavir
  • Netupitant
  • Nevirapine
  • Nifedipine
  • Nilotinib
  • Oxcarbazepine
  • Pazopanib
  • Perampanel
  • Phenobarbital
  • Phenytoin
  • Pimozide
  • Piperaquine
  • Pixantrone
  • Pomalidomide
  • Ponatinib
  • Posaconazole
  • Primidone
  • Quetiapine
  • Quinidine
  • Regorafenib
  • Rifabutin
  • Rifampin
  • Rifapentine
  • Ritonavir
  • Romidepsin
  • Saquinavir
  • Siltuximab
  • Simeprevir
  • Sirolimus
  • Sorafenib
  • St John's Wort
  • Tacrolimus
  • Tasimelteon
  • Telaprevir
  • Telithromycin
  • Ticagrelor
  • Tofacitinib
  • Trabectedin
  • Ulipristal Acetate
  • Vandetanib
  • Vemurafenib
  • Vilazodone
  • Vinflunine
  • Vorapaxar
  • Voriconazole
  • Vortioxetine
  • Warfarin

Using this medicine 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.

  • Ospemifene

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:

  • Brain injury, history of or
  • Brain tumor, history of or
  • Seizures, history of or
  • Stroke, history of or
  • Transient ischemic attack, recent—Use with caution. May cause side effects to become worse.

Proper Use of This Medicine:

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 patient information leaflet. Read and follow the instructions carefully. Ask your doctor if you have any questions.

Take your medicine at the same time each day with or without food.

Swallow the capsule whole. Do not chew, dissolve, or open it.

If you are taking 2 cancer medicines, follow your doctor's instructions on when to take them.

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 (capsules):
    • For prostate cancer:
      • Adults—160 milligrams (mg) once a day.
      • 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.

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 This Medicine:

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

Women should not use this medicine, especially women who are pregnant or able to become pregnant. This medicine can harm an unborn baby. It can also cause birth defects if the father is using it when his sexual partner becomes pregnant. You must use a condom together with a second effective form of birth control during therapy and for 3 months after the last dose. If a pregnancy occurs while you are using this medicine, tell your doctor right away.

This medicine may cause dizziness, tiredness, muscle weakness, or seizures (very rare). Avoid driving, using machines, or doing anything else that could be dangerous until you know how this medicine affects you.

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 of This Medicine:

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
Back pain
bloating or swelling of the face, arms, hands, lower legs, or feet
blood in the urine
blurred vision
chest pain
cough with mucus
difficulty with breathing
dizziness
fever or chills
loss of bladder or bowel control
nervousness
painful or difficult urination
pounding in the ears
slow or fast heartbeat
sore throat
tingling of the hands or feet
unable to move the legs
unusual weight gain or loss
Less common
Anxiety
confusion or excitement
depression
fainting
falling
lightheadedness
loss of memory
memory or attention span problems
nightmares or vivid dreams
rapid, shallow breathing
Rare
Seizures

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
Body aches or pain
bone pain
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
diarrhea
difficulty having a bowel movement (stool)
difficulty with moving
dry throat
ear congestion
feeling of constant movement of self or surroundings
feeling of warmth
hoarseness
joint pain
lack or loss of strength
loss of voice
muscle pain, stiffness, or weakness
pain or tenderness around the eyes and cheekbones
redness of the face, neck, arms, and upper chest
sensation of spinning
stuffy or runny nose
tender, swollen glands in the neck
trouble sleeping
trouble with swallowing
unusual tiredness or weakness
Less common
Bloody nose
dry skin
frequent urination
itching skin
pale-colored urine

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.


Last Updated: 11/4/2014

Copyright © 1984- Thomson Micromedex. All rights reserved.

Thomson & A.D.A.M