Baricitinib can make it harder for your body to fight infections. Therefore, if you have a fever, think you may have an infection or have been prescribed an antibiotic, contact your healthcare provider immediately. Also contact your prescriber if you are having surgery as you may need to stop baricitinib until you are healed and there is no sign of infection.
Before taking baricitinib, tell your healthcare provider if you are pregnant or planning to become pregnant or are breastfeeding or planning to breastfeed. Baricitinib should not be used during pregnancy or while breastfeeding. Currently there are no studies to assess the use of baricitinib during pregnancy and breastfeeding.
Ideally your vaccinations should be up to date prior to starting baricitinib. If you have already started therapy with baricitinib, most inactive vaccines are recommended, if indicated (i.e. influenza, pneumococcal). Live vaccines are not recommended due to risk of causing infection. Baricitinib may increase your risk of shingles. Please speak with your healthcare providers about the shingles vaccine and other vaccinations before starting baricitinib.
Anyone who has had a previous allergic reaction to baricitinib should avoid the medication.
Baricitinib may interact with other medications. Please speak with your healthcare provider about whether any of the other medications you currently take interact with baricitinib.
Your body may harbour the bacteria that can cause tuberculosis (TB) if you have been exposed to TB in the past. You may not know you are carrying TB as the bacteria remain in an inactive state and cause no symptoms. This is known as latent TB infection (LTBI). People with LTBI are not infectious and cannot spread TB to others. Baricitinib can increase the risk of reactivation of LTBI. Prior to starting baricitinib therapy, your prescriber will screen for LTBI. If you test positive you will be required to take an anti-TB medication prior to starting baricitinib. Please speak with your healthcare provider about LTBI screening before starting a baricitinib.
Baricitinib has been rarely associated with a small increased risk of developing certain types of cancer. Proof of a link between baricitinib and the development of cancer is difficult as people with inflammatory arthritis are generally at a higher risk of developing certain cancers, as compared to the general population. The role of baricitinib in the development of cancer is currently unknown. Please speak with your healthcare provider if you have any questions.