Get emergency medical help if you have signs of an allergic reaction to Kcentra: hives, rash; nausea, vomiting, feeling light-headed; fast heartbeats; chest tightness, wheezing, difficult breathing; swelling of your face, lips, tongue, or throat.
Tell your caregivers right away if you have:
a light-headed feeling, like you might pass out;
chest pain or pressure, pain when you breathe, shortness of breath;
flushing (sudden warmth, redness, or tingly feeling);
low red blood cells (anemia) - pale skin, unusual tiredness, feeling light-headed or short of breath, cold hands and feet;
signs of a stroke - sudden numbness or weakness (especially on one side of the body), severe headache, slurred speech, balance problems;
signs of a blood clot in the lung - chest pain, sudden cough, wheezing, rapid breathing, coughing up blood; or
signs of a blood clot deep in the body - swelling or pain in your arms, legs, or stomach.
Common Kcentra side effects may include:
low blood pressure;
anemia;
nausea, vomiting; or
headache.
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.
 Kcentra side effects (more detail)
