Why is this medication prescribed?

Fulvestrant injection is prescribed for the treatment of certain types of hormone-receptor-positive breast cancer in postmenopausal women. It is used when the cancer has spread to other parts of the body (metastatic breast cancer) and has not responded well to other treatments such as anti-estrogen medications like tamoxifen or aromatase inhibitors. Fulvestrant works by blocking the effects of estrogen in the body, which can slow or stop the growth of cancer cells. It is typically given as an intramuscular injection into the buttocks.

How should this medicine be used?

Fulvestrant injection is typically administered by a healthcare professional. Here are the general guidelines for its use:

• Dosage: The usual dose of Fulvestrant is 500 mg injected into the muscle (gluteal region) on days 1, 15, 29, and once monthly thereafter. Your doctor will determine the appropriate dosage based on your specific condition and medical history.
• Administration: The injection is given as an intramuscular injection. A healthcare professional will administer the injection, typically in a clinic or healthcare setting.
• Preparation: The medication usually comes in a pre-filled syringe or vial. The healthcare professional will prepare the injection according to the manufacturer’s instructions.
• Injection site: The injection is typically given in the buttock (gluteal muscle). The healthcare professional will choose the appropriate site and ensure proper technique to minimize discomfort and reduce the risk of complications.
• Monitoring: Your doctor may monitor you closely during and after the injection for any potential side effects or complications.
• Follow-up: It is important to follow your doctor’s instructions regarding the dosing schedule and follow-up appointments. Do not miss any doses, and let your doctor know if you have any concerns or experience any side effects.
• Storage: Store Fulvestrant injection according to the instructions provided by the manufacturer. It is typically stored at room temperature away from light and moisture.

Always follow your doctor’s instructions and guidance regarding the use of Fulvestrant injection. If you have any questions or concerns, do not hesitate to discuss them with your healthcare provider.

Other uses for this medicine

Some potential off-label uses may include:

• Treatment of hormone receptor-positive early-stage breast cancer.
• Combination therapy with other medications for the treatment of certain types of breast cancer.
• Investigational use in other hormone-sensitive cancers, such as endometrial cancer or ovarian cancer.

What special precautions should I follow?

Special precautions to consider when using Fulvestrant injection include:

• Pregnancy and breastfeeding: Fulvestrant can cause harm to a developing fetus and is not recommended for use during pregnancy. It is also not known if Fulvestrant passes into breast milk, so breastfeeding is not advised while receiving treatment.
• Liver function: Fulvestrant is primarily metabolized by the liver. Therefore, individuals with pre-existing liver conditions may require close monitoring while using Fulvestrant.
• Injection site reactions: Injection site reactions, such as pain, swelling, or redness, may occur with Fulvestrant injection. Inform your healthcare provider if you experience any persistent or severe injection site reactions.
• Bone health: Estrogen deprivation, which is induced by Fulvestrant, may contribute to bone density loss and increase the risk of osteoporosis. Discuss with your doctor measures to monitor and manage bone health during treatment, such as calcium and vitamin D supplementation or bone density scans.
• Hematologic effects: Fulvestrant may cause changes in blood cell counts, such as decreased white blood cell count (neutropenia) or platelet count (thrombocytopenia). Regular blood tests may be necessary to monitor for these effects.
• Drug interactions: Inform your doctor about all medications, supplements, and herbal products you are taking, as they may interact with Fulvestrant. This includes over-the-counter medications and prescription drugs.
• Allergic reactions: If you have a history of hypersensitivity or allergic reactions to Fulvestrant or any of its components, inform your healthcare provider before starting treatment.

Always follow your doctor’s instructions and advice regarding the use of Fulvestrant injection, and report any side effects or concerns promptly.

What special dietary instructions should I follow?

Regarding special dietary instructions for Fulvestrant injection, there are no specific dietary restrictions associated with its use. However, maintaining a healthy and balanced diet can support overall well-being during cancer treatment.

What should I do if I forget a dose?

If you forget a dose of Fulvestrant injection, contact your healthcare provider for guidance. It’s essential to adhere to the prescribed dosing schedule to ensure optimal treatment outcomes. Your doctor may advise on when to administer the missed dose or adjust the dosing schedule accordingly. Avoid doubling doses to make up for a missed one without consulting your healthcare provider first.

What side effects can this medication cause?

Fulvestrant injection, like any medication, can cause side effects. Common side effects may include:

• Injection site reactions: Pain, swelling, redness, or bruising at the injection site.
• Nausea and vomiting.
• Headache.
• Hot flashes.
• Weakness or fatigue.
• Joint pain.
• Back pain.
• Stomach pain.
• Loss of appetite.
• Constipation.
• Diarrhea.
• Dizziness.
• Insomnia (difficulty sleeping).
• Respiratory infections, such as cough or upper respiratory tract infection.

Serious side effects are less common but may include:

• Allergic reactions: Symptoms may include rash, itching, swelling of the face, lips, or throat, and difficulty breathing.
• Liver problems: Signs may include yellowing of the skin or eyes (jaundice), dark urine, abdominal pain, or nausea.
• Blood clotting problems: Fulvestrant may increase the risk of blood clots, which can lead to serious conditions such as deep vein thrombosis (DVT) or pulmonary embolism (PE). Symptoms may include swelling, pain, or redness in the limbs, chest pain, shortness of breath, or coughing up blood.
• Bone fractures: Long-term use of Fulvestrant may increase the risk of bone fractures due to bone density loss.

It’s important to report any side effects you experience to your healthcare provider. They can provide guidance on managing side effects and may adjust your treatment regimen if necessary. Additionally, contact your healthcare provider immediately if you experience any severe or concerning symptoms.

What should I know about storage and disposal of this medication?

Storage and Disposal of Fulvestrant Injection:

• Storage: Fulvestrant Injection should be stored at room temperature, typically between 20 to 25 degrees Celsius (68 to 77 degrees Fahrenheit). It should be kept in its original packaging to protect it from light and moisture. Do not freeze the medication. Keep it out of reach of children and pets.
• Disposal: Dispose of unused Fulvestrant Injection according to local regulations or guidelines. Do not flush it down the toilet or pour it down the drain unless instructed to do so. Ask your healthcare provider or pharmacist about the proper disposal method for this medication.

In case of emergency/overdose

In case of an emergency or suspected overdose of Fulvestrant Injection, contact your local poison control center or seek immediate medical attention. Symptoms of overdose may include severe dizziness, fainting, or difficulty breathing.

What other information should I know?

• Keep all appointments with your healthcare provider for injections and follow-up visits.
• Inform your healthcare provider about all medications, supplements, and herbal products you are taking, as they may interact with Fulvestrant Injection.
• Report any new or worsening symptoms to your healthcare provider promptly, including side effects or changes in your health.
• It’s essential to have regular check-ups and monitoring of your condition while receiving Fulvestrant Injection treatment.
• Avoid becoming pregnant while using Fulvestrant Injection, and use effective contraception during treatment.
• Inform your healthcare provider if you have any allergies, medical conditions, or concerns before starting Fulvestrant Injection treatment.

Always follow your healthcare provider’s instructions and guidance regarding the use, storage, and disposal of Fulvestrant Injection. If you have any questions or concerns, don’t hesitate to discuss them with your healthcare provider or pharmacist.