Skip to Main Navigation Skip to Content
  • Important Safety Information
  • Health Care Professionals
  • AstraZeneca Web Sites
Once-monthly FASLODEX fulvestrant IM Injection. AstraZeneca Pharmaceutical Company.
  • Home
  • About FASLODEX
    • Who Should Take FASLODEX?
    • Why Take FASLODEX
    • How FASLODEX Works
  • Taking FASLODEX
    • How Is FASLODEX Administered?
    • Side Effects
  • Breast Cancer Information
    • The Stages of Breast Cancer
    • Breast Cancer Recurrence
    • Metastatic Breast Cancer
    • Hormone Receptors & Metastatic Breast Cancer
    • Metastatic Breast Cancer Treatment Options
  • Resources and Support
    • Coping with Metastatic Breast Cancer
    • FAQs
    • Talking With Your Doctor
    • Patient Support
    • Recommended Resources
  • Request Information

FASLODEX is a hormonal treatment for metastatic hormone receptor-positive breast cancer. It is for postmenopausal women whose disease has returned or progressed following an antiestrogen (medication that blocks estrogen), such as tamoxifen. FASLODEX may be effective when tamoxifen no longer works for you.

FASLODEX may be your next step

FASLODEX patient representation.
Who Should Take FASLODEX? If your breast cancer recurs or progresses after prior antiestrogen therapy… Postmenopausal women with hormone receptor-positive metastatic breast cancers can still respond to hormonal therapy. Find out more about who should take FASLODEX Why Take FASLODEX? With established safety and effectiveness in two clinical trials… FASLODEX is a hormonal therapy effective in treating postmenopausal women with hormone receptor-positive metastatic breast cancer. Find out why you and your doctor might consider FASLODEX How FASLODEX Works? For tumors that contain estrogen receptors…
FASLODEX works by attaching to estrogen receptors, which blocks estrogen from binding.

See how FASLODEX works

Need help paying for your AstraZeneca medications?


You may be eligible for one of the AZ&Me™ Prescription Savings Programs.

Learn more about how AstraZeneca may be able to help

Important Information About FASLODEX (fulvestrant) Injection

FASLODEX is indicated for the treatment of hormone receptor-positive metastatic breast cancer in postmenopausal women whose disease has returned or progressed following antiestrogen therapy.

Important Safety Information about FASLODEX

Prescription FASLODEX is only for postmenopausal women. Do not take FASLODEX if you are pregnant and do not become pregnant while taking FASLODEX because it may harm your unborn child. (See WARNINGS and CONTRAINDICATIONS sections of full Prescribing Information.)

Because FASLODEX is administered intramuscularly, it should not be used in patients with certain blood disorders or in patients receiving anticoagulants (sometimes called blood thinners, for example, warfarin).

In clinical studies, the most commonly reported side effects were nausea, vomiting, constipation, diarrhea, abdominal pain, headache, back pain, hot flashes, sore throat, and injection site reactions with mild, transient pain and inflammation.

Please see full Prescribing Information. For more information, see your doctor.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.FDA.gov/medwatch or call 1-800-FDA-1088.

FASLODEX is a registered trademark and AZ&Me is a trademark of the AstraZeneca group of companies.

United States flagThis site is intended for US consumers/patients. If you are a non-US consumer/patient, click here.

© 2010 AstraZeneca Pharmaceuticals LP. All rights reserved. 278936 8/09

  • Privacy Statement
  • Legal Terms and Conditions
  • Important Safety Information
  • Contact Us
  • Site Map
  • Glossary
  • Full Prescribing Information
  • FASLODEX Side Effects
  • The Stages of Breast Cancer
  • Breast Cancer Recurrence
  • Metastatic Breast Cancer
  • Metastatic Breast Cancer Treatment Options