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Faslodex: 7 things you should know

Medically reviewed by Carmen Pope, BPharm. Last updated on June 20, 2023.

1. How it works

2. Upsides

3. Downsides

If you are between the ages of 18 and 60, take no other medication or have no other medical conditions, side effects you are more likely to experience include:

Note: In general, seniors or children, people with certain medical conditions (such as liver or kidney problems, heart disease, diabetes, seizures) or people who take other medications are more at risk of developing a wider range of side effects. View complete list of side effects

4. Bottom Line

Faslodex may be used alone or in combination with other agents for the treatments of certain types of breast cancer in postmenopausal women or women with disease progression following endocrine therapy. Faslodex is given by injection into the muscles of the buttock once a month by a healthcare provider. Injection site reactions are the most common side effect and it is at least as effective as anastrozole.

5. Tips

6. Response and effectiveness

7. Interactions

Medicines that interact with Faslodex may either decrease its effect, affect how long it works, increase side effects, or have less of an effect when taken with Faslodex. An interaction between two medications does not always mean that you must stop taking one of the medications; however, sometimes it does. Speak to your doctor about how drug interactions should be managed.

There are is currently only one reported drug interaction with Faslodex:

However, Faslodex has been associated with injection site reactions, including bleeding, and the risk of this may be higher in people already administered anticoagulants, such as warfarin or dabigatran.

Although Faslodex is metabolized by CYP3A4 hepatic enzymes in vitro, studies have shown no alteration of Faslodex pharmacokinetics when it has been administered with CYP3A4 inducers or inhibitors.

Please check the product information for Faslodex for any new interactions.


Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Faslodex only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Copyright 1996-2024 Revision date: June 20, 2023.