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.
Enzalutamide may cause heart problems. Check with your doctor right away if you have chest pain or discomfort or pain or discomfort in the arms, jaw, back, or neck.
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.