Key facts about Fulvestrant
What dosages is Fulvestrant available in?
Fulvestrant, an injection for intramuscular administration, is supplied
as 50 mg/mL Fulvestrant.
What is Fulvestrant used for?
Fulvestrant is an antiestrogen that is used to treat hormone receptor (HR)-positive, advanced or metastatic breast cancer.
How does Fulvestrant work?
Fulvestrant is an estrogen receptor antagonist. It’s a type of hormone therapy that specifically blocks estrogen from binding to breast cancer cells. This medication is useful in treating breast cancers that have estrogen receptors (ERs). Without estrogen, these types of cancer cells won’t have the “fuel” they need to spread.
How do I take Fulvestrant?
The typical starting dose of Fulvestrant is 500 mg injected into muscles of the buttocks every 2 weeks for the first 3 doses (Days 1, 15, and 29). After that, you’ll continue with a maintenance dose of 500 mg monthly.
Depending on your condition, you might be receiving Fulvestrant along with other medications to treat your cancer.
Is it safe for me to take Fulvestrant?
Fulvestrant is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you.
Fulvestrant Common Side Effects
Common side effects of Fulvestrant:
- Joint pain
- Injection site pain
- Nausea
- Hot flash
- Fatigue
Fulvestrant Serious Side Effects
Serious side effects are rare with Fulvestrant.
Effects of other drugs, drug classes and over-the-counter products on Fulvestrant
There are no major drug interactions listed for Fulvestrant. However, always let your physician and pharmacist know about any other medications or supplements (including prescribed and over-the-counter medications, vitamins, and dietary or herbal supplements) that you are currently taking.
Who makes Fulvestrant?
Various FDA-approved generic manufacturers
Is Fulvestrant safe in pregnancy?
Fulvestrant can
harm your unborn baby. Talk to your healthcare provider
about how to prevent pregnancy while taking Fulvestrant.
Tell your healthcare provider right away if you become
pregnant or think you are pregnant while receiving
Fulvestrant.













