What side effects can Jakafi (ruxolitinib) cause?
Jakafi (ruxolitinib) can cause side effects related to blood cell changes, infection risk, and liver or kidney effects. Commonly reported effects include fatigue, dizziness, headache, diarrhea, nausea, shortness of breath, and swelling (edema) [1].
Because Jakafi suppresses parts of the immune system, infections can occur and may become serious. Upper respiratory tract infections and other infections are among the reported risks [1].
What are the most important serious risks people worry about?
The most clinically significant risks include blood count abnormalities and infections. Jakafi can lower red blood cells and platelets, which may lead to anemia, bruising/bleeding risk, and worsening fatigue or weakness. It can also increase infection risk, including more serious infections in some cases [1].
People may also see changes in liver enzymes and other lab abnormalities during treatment [1].
How does Jakafi affect blood counts (anemia and low platelets)?
Jakafi can reduce blood cell production in some patients. Low red blood cells (anemia) and low platelets (thrombocytopenia) are known treatment-related concerns and are reasons clinicians monitor complete blood counts regularly [1].
Does Jakafi increase infection risk? Which infections should patients watch for?
Yes. Jakafi can increase the risk of infections, including more serious ones. Patients are advised to watch for symptoms such as fever, chills, persistent cough, or feeling very unwell and to seek medical care promptly if they occur [1].
What side effects are possible in patients with myelofibrosis vs. polycythemia vera?
Jakafi is used for myelofibrosis and for certain patients with polycythemia vera who need treatment when other options are inadequate or not tolerated. Reported side effects depend on the underlying condition and patient factors, but the core safety themes—blood count changes, infection risk, and lab abnormalities—are consistent [1].
What should I tell my doctor right away while taking Jakafi?
Call a clinician promptly for signs of infection (especially fever or persistent symptoms) and for symptoms that could reflect significant anemia or low platelets, such as unusual bruising, bleeding, or marked worsening fatigue or shortness of breath [1].
How are side effects managed during treatment?
Clinicians typically monitor blood counts and labs regularly and may adjust the dose based on those results. Dose changes can help manage anemia, low platelets, and other lab abnormalities while maintaining treatment benefit [1].
Sources
[1] https://www.accessdata.fda.gov/drugsatfda_docs/label/