Eculizumab Injection

WHY is this medicine prescribed?

Eculizumab injection products are used to treat paroxysmal nocturnal hemoglobinuria (PNH: a type of anemia in which too many red blood cells are broken down in the body, so there are not enough healthy cells to bring oxygen to all parts of the body). Eculizumab injection products are also used to treat atypical hemolytic uremic syndrome (aHUS; an inherited condition in which small blood clots form in the body and may cause damage to the blood vessels, blood cells, kidneys, and other parts of the body). Eculizumab injection (Solaris) is also used to treat a certain form of myasthenia gravis (MG; a disorder of the nervous system that causes muscle weakness).Eculizumab injection (Solaris) is also used to treat neuromyelitis optica spectrum disorder (NMOSD; an autoimmune disorder of the nervous system that affects eye nerves and the spinal cord) in certain adults. Eculizumab injection is in a group of medications called monoclonal antibodies. It works by blocking the activity of the part of the immune system that may damage blood cells in people with PNH and that causes clots to form in people with aHUS. It also works by blocking the activity of the part of the immune system that may damage certain parts of the central nervous system in people with NMOSD or by disrupting communication between nerves and muscles in people with MG.

HOW should this medicine be used?

Eculizumab injection products come as a solution (liquid) to be injected intravenously (into a vein) over at least 35 minutes by a doctor or nurse in a medical office. It is usually given to adults once a week for 5 weeks and then once every other week. Children may receive eculizumab injection on a different schedule, depending on their age and body weight. Extra doses of eculizumab injection products are also given before or after certain other treatments for PNH , aHUS, MG, or NMOSD.

Your doctor will probably start you on a low dose of eculizumab injection and increase your dose after 4 weeks.

Eculizumab injection products may cause serious allergic reactions. Your doctor will watch you carefully while you are receiving an eculizumab injection product and for 1 hour after you receive the medication. Your doctor may slow or stop your infusion if you have an allergic reaction. If you experience any of the following symptoms, tell your doctor immediately: chest pain; feeling faint; rash; hives; swelling of the eyes, face, lips, tongue, or throat; hoarseness; or difficulty breathing or swallowing.

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 an eculizumab injection product,

• tell your doctor and pharmacist if you are allergic to eculizumab injection, any other medications, or any of the ingredients in eculizumab injection products. Ask your pharmacist or check the Medication Guide 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. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
• tell your doctor if you have or have ever had any other medical condition(s).
• tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. If you become pregnant while receiving an eculizumab injection product, call your doctor.
• if your child will be treated with an eculizumab injection product, your child should be vaccinated against Streptococcus pneumoniae and Haemophilus influenza type b (Hib) before beginning treatment. Talk to your child's doctor about giving your child these vaccinations and any other vaccinations your child needs.
• if you are being treated for PNH, you should know that your condition may cause too many red blood cells to break down after you stop receiving an eculizumab injection product. Your doctor will monitor you carefully and may order laboratory tests during the first 8 weeks after you finish your treatment. Call your doctor right away if you develop any of the following symptoms: confusion, chest pain, difficulty breathing, or any other unusual symptoms.
• if you are being treated for aHUS, you should know that your condition may cause blood clots to form in your body after you stop receiving an eculizumab injection product. Your doctor will monitor you carefully and may order laboratory tests during the first 12 weeks after you finish your treatment. Call your doctor right away if you develop any of the following symptoms: sudden trouble speaking or understanding speech; confusion; sudden weakness or numbness of an arm or leg (especially on one side of the body) or of the face; sudden trouble walking, dizziness, loss of balance or coordination; fainting; seizures; chest pain; difficulty breathing; swelling in the arms or legs; or any other unusual symptoms.

What SPECIAL DIETARY instructions should I follow?

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

What should I do IF I FORGET to take a dose?

If you miss an appointment to receive a dose of an eculizumab injection product, call your doctor right away.

What SIDE EFFECTS can this medicine cause?

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

• headache
• runny nose
• pain or swelling in the nose or throat
• cough
• difficulty falling asleep or staying asleep
• excessive tiredness
• dizziness
• muscle or joint pain
• back pain
• pain in the arms or legs
• diarrhea
• nausea
• vomiting
• stomach pain
• painful or difficult urination

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

• fever
• swelling of the arms, hands, feet, ankles, or lower legs
• fast heartbeat
• weakness
• pale skin
• shortness of breath

Eculizumab injection products 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 should I do in case of OVERDOSE?

In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at https://www.poisonhelp.org/help. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911.

What OTHER INFORMATION should I know?

Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests to check your body's response to eculizumab injection products.

Ask your pharmacist any questions you have about eculizumab injection products.

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 20, 2024.