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Estramustine Capsules

What is this medication?

ESTRAMUSTINE (ES tra MUS teen) treats prostate cancer. It works by slowing down the growth of cancer cells.

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This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): Emcyt

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

  • Blood clots
  • Diabetes
  • Heart disease
  • High blood pressure
  • High levels of calcium in the blood
  • Kidney disease
  • Liver disease
  • Migraines
  • Seizures
  • An unusual or allergic reaction to estramustine, other medications, foods, dyes, or preservatives
  • If you or your partner are pregnant or trying to get pregnant

How should I use this medication?

Take this medication by mouth with a glass of water. Take it as directed on the prescription label at the same time every day. Take it on an empty stomach, at least 1 hour before or 2 hours after food. Do not mix this medication with milk, milk products, or calcium-rich foods. Keep taking it unless your care team tells you to stop.

Take products with calcium in them at a different time of day than this medication. Talk to your care team if you have questions.

Handling this medication may be harmful. Wear gloves while touching the medication or bottle. Talk to your care team about how to handle this medication. Special instructions may apply.

Talk to your care team about the use of this medication in children. Special care may be needed.

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Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medication?

Do not take this medication with any of the following:

  • Live virus vaccines

This medication may also interact with the following:

  • Antacids, vitamins, or other products that contain calcium

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Your condition will be monitored carefully while you are receiving this medication.

This medication may increase blood sugar. The risk may be higher in patients who already have diabetes. Ask your care team what you can do to lower your risk of diabetes while taking this medication.

Talk to your care team if your partner may be pregnant. Serious birth defects can occur if you take this medication during pregnancy. If your partner can get pregnant, use a condom during sex while taking this medication.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

  • Allergic reactions or angioedema—skin rash, itching or hives, swelling of the face, eyes, lips, tongue, arms, or legs, trouble swallowing or breathing
  • Blood clot—pain, swelling, or warmth in the leg, shortness of breath, chest pain
  • Heart attack—pain or tightness in the chest, shoulders, arms, or jaw, nausea, shortness of breath, cold or clammy skin, feeling faint or lightheaded
  • High blood sugar (hyperglycemia)—increased thirst or amount of urine, unusual weakness or fatigue, blurry vision
  • Increase in blood pressure
  • Swelling of the ankles, hands, or feet

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

  • Change in sex drive or performance
  • Diarrhea
  • Nausea
  • Unexpected breast tissue growth

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medication?

Keep out of the reach of children and pets.

Store in the refrigerator. Get rid of any unused medication after the expiration date.

To get rid of medications that are no longer needed or have expired:

  • Take the medication to a medication take-back program. Check with your pharmacy or law enforcement to find a location.
  • If you cannot return the medication, ask your pharmacist or care team how to get rid of this medication safely.

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NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

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Note: Introduction and Additional Common Questions written and medically approved by Cleveland Clinic professionals.

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