Tofacitinib is a prescription medicine used to treat adults with moderate to severe rheumatoid arthritis, active psoriatic arthritis, and active ulcerative colitis. It is also called Xeljanz or Xeljanz XR. Tofacitinib is a type of drug called a Janus kinase (JAK) inhibitor. It works by blocking certain proteins in the body that are involved in the immune response. This helps reduce inflammation and damage to the joints and intestines caused by diseases like rheumatoid arthritis and ulcerative colitis.
Tofacitinib, sold under the brand name Xeljanz, is a medication used to treat several inflammatory conditions. Here's a detailed breakdown of its function and uses:
Function: Tofacitinib belongs to a class of drugs called Janus kinase (JAK) inhibitors [1, 2]. JAKs are enzymes involved in the signaling pathways of the immune system. By inhibiting JAK enzymes, Tofacitinib helps to suppress the overactive immune response that contributes to inflammation in various conditions.
Medical Uses:
- Rheumatoid Arthritis (RA): Tofacitinib is approved for the treatment of moderate to severe active RA in adults, particularly when other medications like methotrexate haven't been effective [1, 3].
- Psoriatic Arthritis (PsA): It's also used to treat active PsA in adults when other disease-modifying antirheumatic drugs (DMARDs) haven't provided an adequate response [1, 3].
- Ulcerative Colitis (UC): Tofacitinib can be used to treat moderately severe to severe UC in adults who haven't responded adequately to conventional therapy with corticosteroids or aminosalicylates [1, 3].
Administration:
- Tofacitinib comes in tablet form and is typically taken orally, once or twice daily, with or without food [3].
Advantages:
- Tofacitinib can be a beneficial treatment option for people with moderate to severe inflammatory conditions who haven't responded well to other medications [2].
Important Considerations:
- Tofacitinib can cause side effects, including upper respiratory infections, headache, diarrhea, abdominal pain, and increased risk of infections [3].
- It may also slightly increase the risk of serious events like blood clots in the lungs (pulmonary embolism) or cancer [3].
- Regular blood tests are needed to monitor blood cell counts while on Tofacitinib [3].
- Tofacitinib can weaken the immune system, making you more susceptible to infections. It's crucial to practice good hygiene and inform your doctor promptly if you experience any signs of infection [3].
- Tofacitinib may not be suitable for everyone, especially people with a history of certain infections or weakened immune systems [3].
- Pregnant or breastfeeding women should not take Tofacitinib [3].