What is Enzalutamide?
Commonly Used Brand Name(s)Xtandi
Therapeutic ClassificationsAntineoplastic Agent
- Proper Use
- Missed Dose
- Use & Storage
- Before Using
- Breast Feeding
- Drug Interactions
- Other Interactions
- Other Medical Problems
Enzalutamide is used to treat castration-resistant prostate cancer (prostate cancer that is resistant to medical or surgical treatments that lower testosterone). 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.
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.
Your doctor may give you other medicines (eg, gonadotropin-releasing hormone) unless you had a surgery to lower the amount of testosterone in your body.
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) (four 40 mg capsules) once a day.
- Children—Use and dose must be determined by your doctor.
- For prostate cancer:
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.
Use & StorageTOP
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Do not keep outdated medicine or medicine no longer needed.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.
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:
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.
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.
Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of enzalutamide in the elderly. However, elderly patients are more sensitive to the effects of this medicine than younger adults.
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.
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.
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
- Doxorubicin Hydrochloride Liposome
- Ethinyl Estradiol
- St John's Wort
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.
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 ProblemsTOP
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:
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. Men with female partners must use a condom together with a second effective form of birth control during treatment with this medicine 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, seizures (very rare), and an increased risk for falls and fractures. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.
This medicine may cause a neurological disorder called posterior reversible encephalopathy syndrome (PRES). Check with your doctor right away if you have seizures, headache, confusion, unusual drowsiness, dullness, tiredness, weakness, feeling of sluggishness, or blurred vision.
This medicine may cause serious allergic reactions, which can be life-threatening and require immediate medical attention. Tell your doctor right away if you have a fast heartbeat, fever, joint pain, stiffness, or swelling, rash, redness of the skin, swelling of the eyelids, face, lips, hands, or feet, tightness in the chest, or trouble with breathing or swallowing.
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.