Fulvestrant is used to treat certain types of breast cancer. Breast cancer cells need the hormone estrogen in order to grow. Fulvestrant works by blocking the effect of estrogen, slowing tumor cell growth.
This medication is injected slowly into the buttock muscle as directed by your doctor. It is usually given every 2 weeks for the first 3 doses and then monthly thereafter.
The dosage is based on your medical condition. You will be instructed on whether to give your dose as one or two injections. To minimize discomfort, the medication can be taken out of the refrigerator up to 1 hour before the scheduled dose and allowed to reach room temperature.
If you are giving this medication to yourself at home, learn all preparation and usage instructions from your health care professional. This medication is normally clear and colorless to yellow in color. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. Learn how to store and discard medical supplies safely.
Pain/swelling/redness at the injection site, nausea, vomiting, loss of appetite, constipation, diarrhea, upset stomach, dizziness, tiredness, weakness, headache, body aches/pains, flushing and sweating (hot flushes/hot flashes), or trouble sleeping may occur. Changes in diet such as eating several small meals or limiting physical activity may help lessen the chance of nausea and vomiting. If any of these effects continue or worsen, notify your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: burning/painful/frequent urination, numbness/tingling/swelling of the hands or feet, pain/redness/swelling of the arms or legs, bone/pelvis/hip pain, signs of infection (e.g., fever, persistent sore throat), persistent cough, persistent vaginal bleeding, mental/mood changes (e.g., anxiety, depression), chest pain, trouble breathing.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before using this medication, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients (such as benzyl alcohol), which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver disease, bleeding problems, low platelet counts (thrombocytopenia), current treatment with "blood thinners" (e.g., warfarin).
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while you are using fulvestrant. Fulvestrant may harm an unborn baby. A pregnancy test should be done within 7 days of starting this medication. Ask your doctor about reliable forms of birth control while using this medication and for 1 year after stopping treatment. Products containing estrogen (such as birth control pills) should not be used. If you become pregnant, talk to your doctor right away about the risks and benefits of this medication.
It is unknown if this drug passes into breast milk. Because of the possible risk to the infant, breast-feeding while using this drug and for 1 year after stopping treatment is not recommended. Consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
Laboratory and/or medical tests (such as liver function tests) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
For the best possible benefit, it is important to receive each scheduled dose of this medication as directed. If you miss a dose, contact your doctor or pharmacist right away to establish a new dosing schedule. Do not double the dose to catch up.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.Information last revised July 2016. Copyright(c) 2016 First Databank, Inc.
With WebMD's Medicine Cabinet, you can check interactions with drugs.Go to medicine cabinet