Gemtuzumab Ozogamicin Injection

WHY is this medicine prescribed?

Gemtuzumab ozogamicin injection is used alone or in combination with other chemotherapy medications to treat a certain type of acute myeloid leukemia (AML; a type of cancer that begins in the white blood cells) in adults and children 1 month of age and older who were recently found to have this cancer. It is also used alone to treat a certain type of AML in adults and children 2 years of age and older whose cancer worsened during or after treatment with other chemotherapy medications. Gemtuzumab ozogamicin injection is in a class of medications called monoclonal antibodies. It works by helping to kill cancer cells.

HOW should this medicine be used?

Gemtuzumab ozogamicin injection comes as a powder to be mixed with liquid and given through a needle or catheter placed into a vein. It is usually injected slowly over a period of 2 hours. Your doctor will tell you how often you will receive gemtuzumab ozogamicin injection. The dosing schedule depends on if you are being treated with other chemotherapy medications, if your cancer was previously treated, and how your body responds to the medication.

Gemtuzumab ozogamicin injection may cause serious or life-threatening reactions during an infusion and for up to a day afterwards. You will receive certain medications to help prevent a reaction before you receive each dose of gemtuzumab ozogamicin. A doctor or nurse will watch you closely while you are receiving the infusion and shortly after the infusion to be sure you are not having a serious reaction to the medication. Tell your doctor or nurse immediately if you experience any of the following symptoms that may occur during or within 24 hours after the infusion: rash, fever, chills, fast heartbeat, swollen tongue or throat, shortness of breath or difficulty breathing.

Your doctor may slow down your infusion, delay, or stop your treatment with gemtuzumab ozogamicin injection, or treat you with additional medications depending on your response to the medication and any side effects that you experience. Talk to your doctor about how you are feeling during and after your treatment.

Are there OTHER USES for this medicine?

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

What SPECIAL PRECAUTIONS should I follow?

Before receiving gemtuzumab ozogamicin injection,

• tell your doctor and pharmacist if you are allergic to gemtuzumab ozogamicin, any other medications, or any of the ingredients in gemtuzumab ozogamicin injection. Ask your pharmacist for a list of the ingredients.
• tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take.
• tell your doctor if you or anyone in your family has or has ever had long QT syndrome (condition that increases the risk of developing an irregular heartbeat that may cause fainting or sudden death), or if you have or have ever had or higher or lower than normal levels of sodium, potassium, calcium, or magnesium in your blood.
• tell your doctor if you are pregnant, plan to become pregnant, or plan to father a child. You should not become pregnant while you are receiving gemtuzumab ozogamicin injection. You will need to have a negative pregnancy test before you begin receiving this medication. Use effective birth control during your treatment with gemtuzumab ozogamicin injection and for 6 months after your final dose. If you are a male and your partner can become pregnant, you should use effective birth control during your treatment and for 3 months after your final dose. If you or your partner become pregnant while receiving gemtuzumab ozogamicin injection, call your doctor.
• tell your doctor if you are breastfeeding. You should not breastfeed while you are receiving gemtuzumab ozogamicin injection, and for 1 month after your final dose.
• you should know that this medication may decrease fertility in men and women. Talk to your doctor about the risks of receiving gemtuzumab ozogamicin.

What SPECIAL DIETARY instructions should I follow?

Unless your doctor tells you otherwise, continue your normal diet.

What SIDE EFFECTS can this medicine cause?

Gemtuzumab ozogamicin injection may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• rash
• diarrhea
• constipation
• nausea
• vomiting
• headache
• pain
• pain, swelling, or sores in mouth or throat

Some side effects can be serious. If you experience any of these symptoms or those listed in the IMPORTANT WARNING section, call your doctor immediately or get emergency medical treatment:

• unusual or severe bleeding or bruising
• cough, shortness of breath, or difficulty breathing
• fast heartbeat
• fever, chills, sore throat, or other signs of infection

Gemtuzumab ozogamicin injection may cause other side effects. Call your doctor if you have any unusual problems while receiving this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (https://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).

What OTHER INFORMATION should I know?

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

This report on medications is for your information only, and is not considered individual patient advice. Because of the changing nature of drug information, please consult your physician or pharmacist about specific clinical use.

The American Society of Health-System Pharmacists, Inc. represents that the information provided hereunder was formulated with a reasonable standard of care, and in conformity with professional standards in the field. The American Society of Health-System Pharmacists, Inc. makes no representations or warranties, express or implied, including, but not limited to, any implied warranty of merchantability and/or fitness for a particular purpose, with respect to such information and specifically disclaims all such warranties. Users are advised that decisions regarding drug therapy are complex medical decisions requiring the independent, informed decision of an appropriate health care professional, and the information is provided for informational purposes only. The entire monograph for a drug should be reviewed for a thorough understanding of the drug's actions, uses and side effects. The American Society of Health-System Pharmacists, Inc. does not endorse or recommend the use of any drug. The information is not a substitute for medical care.

AHFS^® Patient Medication Information™. © Copyright, 2024. The American Society of Health-System Pharmacists^®, 4500 East-West Highway, Suite 900, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.

Selected Revisions: August 15, 2020.