April 30, 2017
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Faslodex Patient Information Including Side Effects

Brand Names: Faslodex

Generic Name: fulvestrant (Pronunciation: ful VES trant)

What is fulvestrant (Faslodex)?

Fulvestrant is an anti-estrogen medication. It works by blocking the actions of estrogen in the body. Certain types of breast cancer use estrogen to grow and multiply in the body.

Fulvestrant is used to treat some hormone-related breast cancer. Fulvestrant is also used in postmenopausal women whose breast cancer has progressed after treatment with other anti-estrogen medication.

Fulvestrant may also be used for purposes not listed in this medication guide.

What are the possible side effects of fulvestrant (Faslodex)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Less serious side effects may include:

  • headache, back pain;
  • bone pain, joint pain, muscle pain;
  • vomiting, loss of appetite, constipation;
  • weakness, feeling tired;
  • cough, trouble breathing;
  • pain in your arms or legs;
  • hot flashes; or
  • pain where the medicine was injected.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the Faslodex (fulvestrant) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about fulvestrant (Faslodex)?

Do not receive fulvestrant if you are pregnant. It could harm the unborn baby.

You should not receive this medication if you are allergic to fulvestrant, or if you are breast-feeding a baby.

Before you receive fulvestrant, tell your doctor if you have liver disease, a bleeding or blood-clotting disorder, or thrombocytopenia (a low level of platelets in the blood). Also tell your doctor if you are taking a blood thinner such as warfarin (Coumadin, Jantoven).

Call your doctor for instructions if you miss an appointment for your fulvestrant injection.

Side Effects Centers

Faslodex - User Reviews

Faslodex User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Faslodex sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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