Medically reviewed: December 27, 2017
What is tofacitinib?
Tofacitinib works by blocking certain enzymes in the body that affect immune system function.
Tofacitinib is used to treat moderate to severe rheumatoid arthritis in adults who have tried methotrexate or other medications without successful treatment of symptoms. Tofacitinib is sometimes given in combination with methotrexate or other arthritis medicines.
Tofacitinib may also be used for purposes not listed in this medication guide.
You should not use tofacitinib if you have a serious infection. Before you start treatment, your doctor may perform tests to make sure you do not have an infection.
Serious and sometimes fatal infections may occur during treatment with tofacitinib. Stop using this medicine and call your doctor right away if you have signs of infection such as: fever, chills, sore throat, flu symptoms, sores or white patches in your mouth or throat, night sweats, stomach pain, diarrhea, weight loss, skin redness and swelling, or cough and chest pain.
Before taking this medicine
You should not use tofacitinib if you are allergic to it, or if you have severe liver disease.
Tell your doctor if you have ever had tuberculosis, if anyone in your household has tuberculosis, or if you have recently traveled to an area where tuberculosis is common.
To make sure tofacitinib is safe for you, tell your doctor if you have ever had:
an active or chronic infection;
any type of infection caused by bacteria, fungus, or virus;
an infected skin wound;
liver disease (especially if you are a carrier of hepatitis B or C);
HIV or AIDS;
a weak immune system caused by disease or by using certain medicines (especially methotrexate or steroid medicine such as dexamethasone).
Tofacitinib may increase your risk of certain cancers by changing the way your immune system works. If you have had a kidney transplant, tofacitinib may cause your body to produce too much of a certain type of white blood cell.
It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant. Use effective birth control to prevent pregnancy while you are using this medicine, and for at least 4 weeks after your last dose.
If you are pregnant, your name may be listed on a pregnancy registry. This is to track the outcome of the pregnancy and to evaluate any effects of tofacitinib on the baby.
It is not known whether tofacitinib passes into breast milk or if it could harm a nursing baby. You should not breast-feed while using this medicine.
How should I take tofacitinib?
Before you start treatment with tofacitinib, your doctor may perform tests to make sure you do not have tuberculosis or other infections.
Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
You may take tofacitinib with or without food.
Do not crush, chew, or break an extended-release tablet. Swallow it whole.
Tofacitinib can lower blood cells that help your body fight infections and help your blood to clot. Your blood will need to be tested often. Further doses may be delayed based on the results of these tests. Your doctor may also want to check your skin for signs of cancer.
If you have hepatitis B or C you may develop liver symptoms while taking this medicine. Your doctor may want to check your liver function before and during your treatment with tofacitinib.
Store in the original container at room temperature away from moisture and heat.
Some tablet forms of tofacitinib are made with a shell that is not absorbed or melted in the body. Part of the tablet shell may appear in your stool. This is a normal side effect of tofacitinib and will not make the medication less effective.
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking tofacitinib?
Do not receive a "live" vaccine while using tofacitinib, and avoid coming into contact with anyone who has recently received a live vaccine. There is a chance that the virus could be passed on to you. Live vaccines include measles, mumps, rubella (MMR), polio, rotavirus, typhoid, yellow fever, varicella (chickenpox), zoster (shingles), and nasal flu (influenza) vaccine.
Tofacitinib side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Serious and sometimes fatal infections may occur during treatment with tofacitinib. Stop using this medicine and call your doctor right away if you have signs of infection such as:
fever, chills, tired feeling, night sweats;
stomach pain, loss of appetite, diarrhea, weight loss, or a change in your bowel habits;
pain or burning when you urinate;
body aches, sore throat, cough, flu symptoms, sores in your mouth and throat;
stabbing chest pain, wheezing, feeling short of breath, cough with mucus or blood; or
skin redness and swelling.
Tofacitinib may also cause severe liver symptoms. Call your doctor at once if you have any of these liver symptoms:
low fever, itching, tiredness, body aches;
upper stomach pain, loss of appetite;
dark urine, clay-colored stools; or
jaundice (yellowing of the skin or eyes).
Common side effects may include:
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect tofacitinib?
Many drugs can interact with tofacitinib. Not all possible interactions are listed here. Tell your doctor about all your current medicines and any you start or stop using, especially:
an antibiotic or antifungal medicine;
heart or blood pressure medicine;
tuberculosis medicine; or
This list is not complete and many other drugs can interact with tofacitinib. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Give a list of all your medicines to any healthcare provider who treats you.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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- Drug class: antirheumatics
Other brands: Xeljanz XR