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Baricitinib

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Warning

Baricitinib 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. The most common serious infections include pneumonia, shingles, and urinary tract infections. The risk for infections may be higher if you also take other drugs that suppress the immune system (such as methotrexate, corticosteroids). Tell your doctor right away if you have any signs of infection (such as a sore throat that doesn't go away, fever, chills, cough, painful/frequent urination, non-healing skin sores).

If treating rheumatoid arthritis or alopecia areata, you should have a tuberculosis (TB) skin test before and during treatment with this medication. Tell your doctor if you have been near someone with tuberculosis or have lived or traveled in areas where certain fungal infections (such as coccidioidomycosis, histoplasmosis) are common. These areas include the Ohio and Mississippi River valleys and the southwestern United States.

Though it is very unlikely to occur, there may be a risk of developing cancer (such as lymphoma, skin cancer, lung cancer) with this medication. Your risk may be higher if you are a current or past smoker. Tell your doctor right away if you develop symptoms such as fever or cough that doesn't go away, wheezing, unusual lumps/growths, unexplained weight loss, night sweats, change in appearance or size of moles, or unusual skin changes.

Baricitinib may rarely cause serious (possibly fatal) blood clots in the lungs or legs, or clots that cause a stroke or heart attack. You may be at an increased risk for blood clots if you are a current or past smoker, or are 50 years of age or older and have at least one risk factor for heart disease. Discuss the risks and benefits of treatment with your doctor. Get medical help right away if you develop symptoms of blood clots, including shortness of breath/rapid breathing, chest/jaw/left arm pain, unusual sweating, confusion, sudden dizziness/fainting, pain/swelling/warmth in the groin/calf, sudden/severe headaches, trouble speaking, weakness on one side of the body, or sudden vision changes.

Precautions

See also Warning section.

Before taking baricitinib, 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: blood clots (such as in the lungs, legs), heart problems (such as previous heart attack), stroke, current or past smoking, blood/bone marrow problems (such as anemia), cancer, kidney disease, liver disease (such as hepatitis B or C), past/recent/current infections (such as tuberculosis, herpes zoster, HIV infection), stomach/intestinal problems (such as ulcers, diverticulitis).

Baricitinib 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 baricitinib 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. Discuss the risks and benefits with your doctor.

It is unknown if this medication passes into breast milk. Because of the possible risk to the infant, breastfeeding is not recommended while taking this medication and for at least 4 days after the last dose. Consult your doctor before breastfeeding.

Side Effects

See also Warning section.

People using this medication may have serious side effects. However, you have been prescribed this drug because your doctor has judged that the benefit to you is greater than the risk of side effects. Careful monitoring by your doctor may decrease your risk.

Tell your doctor right away if you have any serious side effects, including: signs of anemia (such as unusual tiredness, pale skin, fast heartbeat), signs of liver disease (such as nausea/vomiting that doesn't stop, loss of appetite, stomach/abdominal pain, yellowing eyes/skin, dark urine), signs of a serious tear in the stomach or intestinal wall (such as severe stomach/abdominal pain that doesn't go away, fever, severe dizziness, fainting, severe nausea/vomiting).

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.

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