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Commonly Used Brand Name(s)Faslodex
- Proper Use
- Missed Dose
- Before Using
- Breast Feeding
- Drug Interactions
- Other Interactions
- Other Medical Problems
Fulvestrant injection is used to treat hormone-receptor (HR) positive, human epidermal growth factor receptor 2 (HER2)-negative advanced breast cancer in postmenopausal women who have not been treated previously with other medicines. It is also used in combination with palbociclib or abemaciclib to treat HR positive, HER2-negative advanced or metastatic (cancer that has spread) breast cancer in women who have received hormonal therapy.
Many of the breast cancer tumors will grow when estrogen is available in the body. This medicine blocks the effects of estrogen in the body. As a result, the amount of estrogen that the tumor is exposed to, is reduced, which will limit the growth of the tumor.
This medicine is to be given only by or under the direct supervision of your doctor.
Medicines used to treat cancer are very strong and can have many side effects. Before receiving this medicine, make sure you understand all the risks and benefits. It is important for you to work closely with your doctor during your treatment.
A nurse or other trained health professional will give you this medicine in a hospital or cancer treatment center. This medicine is given as a shot into the buttocks slowly on days 1, 15, 29, and once every month thereafter.
This medicine comes with patient instructions. Read and follow the instructions carefully. Ask your doctor if you have any questions.
Cancer medicines can cause nausea or vomiting, even after receiving medicines to prevent it. If you have nausea and vomiting after receiving this medicine, talk to your doctor or nurse about ways to control these effects.
This medicine needs to be given on a fixed schedule. If you miss a dose, call your doctor, home health caregiver, or treatment clinic for instructions.
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Appropriate studies have not been performed on the relationship of age to the effects of fulvestrant injection in the pediatric population. Safety and efficacy have not been established.
Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of fulvestrant injection in the elderly.
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Tell your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
Other Medical ProblemsTOP
The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:
- Bleeding problems or
- Thrombocytopenia (low platelets in the blood)—Use with caution. May make these conditions worse.
- Liver disease, moderate—Use with caution. The effects may be increased because of slower removal of the medicine from the body.
It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood tests may be needed to check for unwanted effects.
Using this medicine while you are pregnant can harm your unborn baby. If you are a woman who can bear children, your doctor may give you a pregnancy test 7 days before you start receiving this medicine to make sure you are not pregnant. Use a highly effective form of birth control to keep from getting pregnant during treatment and for 1 year after your last dose. If you think you have become pregnant while using the medicine, tell your doctor right away.
Talk with your doctor before receiving this medicine if you plan to have children. Some men and women who receive this medicine have become infertile (unable to have children).
This medicine may increase your risk of bleeding. This is more likely to occur if you have bleeding problems or if you are taking a blood thinner (eg, warfarin). Tell your doctor right away if you have unusual bleeding or bruising after receiving this medicine.
Tell your doctor if you have numbness, tingling, or weakness in your legs after receiving this medicine.
Before you have any medical tests, tell the medical doctor in charge that you are using this medicine. The results of some tests (eg, serum estradiol) may be affected by this medicine.