This medication is used to treat certain bowel diseases (ulcerative colitis, Crohn's disease). Mirikizumab belongs to a class of drugs known as monoclonal antibodies. It works by blocking a certain natural protein in your body (interleukin-23) that may cause inflammation and swelling.

Read the Medication Guide and the Instructions for Use leaflet provided by your pharmacist before you start using mirikizumab and each time you get a refill. Ask your health care professional how to prepare and use this medication. If you have any questions, ask your doctor or pharmacist.

Before treatment with this medication, your doctor will test you for tuberculosis (TB). Your doctor should also monitor you for symptoms of TB during and after treatment with this drug. If needed, treatment for TB or other infections should be given before using this medication.

This medication is given by injection as directed by your doctor, usually every 4 weeks. For the first 3 or 6 doses, the medication is given by injection into a vein by a health care professional. Later doses are given by injection under the skin. Each dose given under the skin requires 2 injections, one after the other. The injection is given in the thighs, the abdomen (at least 2 inches from your belly button), or the back of the upper arms. The dosage and treatment schedule are based on your medical condition and response to treatment.

Depending on your product, take the medication out of the refrigerator at least 30-45 minutes before you inject it to allow it to reach room temperature. Do not warm up this medication any other way (for example, do not heat it in the microwave or place it in hot water). Do not shake the medication. Before using, check this product for cloudiness, particles, or discoloration. If you see any of these things, do not use the liquid. Before injecting each prefilled pen or syringe, clean the skin you are going to inject into (the injection site) with rubbing alcohol. Change the injection site each time to lessen injury under the skin. Do not inject into skin that is tender, sore, bruised, red, or hardened. To lessen bruising, do not rub the injection site after a shot. Learn how to store and discard medical supplies safely.

Use this medication regularly to get the most benefit from it. To help you remember, mark your calendar with a reminder.

Tell your doctor if your condition lasts or gets worse.

Redness, pain, or swelling may occur at the injection site. Headache or joint pain may also occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

Remember that this medication has been prescribed because your doctor 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.

This medication may lower your ability to fight infections. This may make you more likely to get a serious (rarely fatal) infection or make any infection you have worse. Tell your doctor right away if you have any signs of infection (such as sore throat that doesn't go away, fever, chills, cough).

Get medical help right away if you have any very serious side effects, including:

• signs of liver problems (such as nausea/vomiting that doesn't stop, loss of appetite, yellowing eyes/skin, dark urine)

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 mirikizumab, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, 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:

• current/recent/returning infection (such as tuberculosis, herpes)

Mirikizumab can make you more likely to get infections or may make current infections worse. Stay away from anyone who has an infection that may easily spread (such as chickenpox, COVID-19, measles, flu). Talk to your doctor if you have been exposed to an infection or for more details.

Tell your health care professional that you are using mirikizumab before having any immunizations/vaccinations. Avoid contact with people who have recently received live vaccines (such as flu vaccine inhaled through the nose).

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

During pregnancy, this medication should be used only when clearly needed. It may harm an unborn baby. Discuss the risks and benefits with your doctor.

It is unknown if this medication passes into breast milk. Consult your doctor before breastfeeding.

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 1-800-222-1222. Canada residents can call 1-844-764-7669.

Do not share this medication with others.

Lab and/or medical tests (such as liver function) should be done before you start using this medication and while you are using it. Keep all medical and lab appointments. Consult your doctor for more details.

It is important to get each dose of this medication as scheduled. If you miss a dose, ask your doctor or pharmacist right away for a new dosing schedule. Do not double the dose to catch up.

Store in the refrigerator. Do not freeze. Keep the medication in the original carton to protect from light. The prefilled pen or syringe may also be stored at room temperature if needed. If the prefilled pen or syringe is stored at room temperature, do not put it back in the refrigerator and discard after 2 weeks. Keep all medications away from children and pets.

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.