Apalutamide is used to treat certain types of prostate cancer (cancer in men that begins in the prostate [a male reproductive gland]) and has spread to other parts of the body or that has not spread to other parts of the body but has not been helped by other medical treatments. Apalutamide is in a class of medications called androgen receptor inhibitors. It works by blocking the effects of androgen (a male reproductive hormone) to stop the growth and spread of cancer cells.

Apalutamide comes as a tablet to take by mouth. It is usually taken with or without food once a day. Take apalutamide at around the same time every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take apalutamide exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Swallow the tablet(s) whole; do not split, chew, or crush them. If you cannot swallow the tablet(s) whole, talk to your doctor or pharmacist. Carefully read the manufacturer’s instructions for use that comes with the medication. These instructions describe how to prepare and take a dose of apalutamide tablets if you can not swallow them whole. Be sure to ask your pharmacist or doctor if you have any questions.

Apalutamide tablets may also be given in certain types of feeding tubes. If you have a feeding tube, ask your doctor how you should take the medication. Follow your doctor’s directions carefully.

Your doctor may decrease your dose or temporarily or permanently stop your treatment if you experience serious side effects during your treatment. Be sure to talk to your doctor about how you are feeling during your treatment with apalutamide.

If your doctor has prescribed another medication such as goserelin (Zoladex), histrelin (Supprelin LA, Vantas), leuprolide (Camcevi, Eligard, Fensolvi, Lupron), or triptorelin (Trelstar, Triptodur) to treat your prostate cancer, you will need to continue receiving this medication during your treatment with apalutamide.

Continue to take apalutamide even if you feel well. Do not stop taking apalutamide without talking to your doctor.

Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient.

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

Before taking apalutamide,

• tell your doctor and pharmacist if you are allergic to apalutamide, any other medications, or any of the ingredients in apalutamide tablets. Ask your pharmacist for a list of the ingredients.
• tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements and herbal products you are taking or plan to take. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
• The following nonprescription or herbal products may interact with apalutamide: fexofenadine (Allegra) and omeprazole (Prilosec OTC, Zegerid OTC). Be sure to let your doctor and pharmacist know that you are taking these medications before you start taking apalutamide. Do not start these medications while taking apalutamide without discussing it with your healthcare provider.
• tell your doctor if you have or have ever had heart problems such as a heart attack, angina (chest pain), heart failure, or hypertension or a stroke or ministroke. Also, tell your doctor if you have ever had seizures, a brain injury, a brain tumor, high cholesterol, diabetes, thyroid problems, or osteoporosis.
• you should know that apalutamide is only for use in men. Women should not take this medication, especially if they are or may become pregnant or are breastfeeding. If taken by pregnant women, apalutamide may harm the fetus. If a pregnant woman takes apalutamide, she should call her doctor immediately.
• if your partner is pregnant, you must use a condom whenever you have sex during your treatment with apalutamide and for three months after your final dose. If your partner is not pregnant but could become pregnant, you must use a condom and another form of birth control whenever you have sex during your treatment and for 3 months after your final dose. Do not donate semen or sperm while you are taking apalutamide and for 3 months after your final dose.
• you should know that apalutamide may cause seizures. Do not drive a car or operate machinery until you know how this medication affects you.
• you should know that apalutamide may cause your muscles and bones to get weak, which may increase your risk of falling and breaking a bone.

Unless your doctor tells you otherwise, continue your normal diet.

Take the missed dose as soon as you remember it. However, if you do not remember until the next day, skip the missed dose and continue your regular dosing schedule. Do not take more than one dose in one day and do not take a double dose to make up for a missed one.

Apalutamide may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• weakness
• tiredness
• joint pain
• muscle weakness or stiffness
• diarrhea
• nausea
• loss of appetite
• weight loss
• hot flashes

Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately or get emergency medical treatment:

• seizures
• loss of consciousness
• swelling of the arms, legs, hands, or feet
• falling
• chest pain
• shortness of breath
• numbness or weakness of face, arm, or leg, especially on one side of the body; difficulty talking or understanding; difficulty seeing in one or both eyes; dizziness; loss of balance or coordination; or difficulty walking
• rash
• skin blistering, peeling, or redness with or without a fever
• fever or flu-like symptoms
• swollen glands

Apalutamide may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration’s (FDA) MedWatch Adverse Event Reporting program online (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from light, excess heat and moisture (not in the bathroom).

It is important to keep all medication out of sight and reach of children as many containers (such as weekly pill minders and those for eye drops, creams, patches, and inhalers) are not child-resistant and young children can open them easily. To protect young children from poisoning, always lock safety caps and immediately place the medication in a safe location – one that is up and away and out of their sight and reach. http://www.upandaway.org

Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them. However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program. Talk to your pharmacist or contact your local garbage/recycling department to learn about take-back programs in your community. See the FDA’s Safe Disposal of Medicines website (http://goo.gl/c4Rm4p) for more information if you do not have access to a take-back program.

In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at https://www.poisonhelp.org/help. If the victim has collapsed, had a seizure, has trouble breathing, or can’t be awakened, immediately call emergency services at 911.

Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests to check your body’s response to apalutamide.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

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