Your doctor should order a blood test to check your kidney function before you start edoxaban. Edoxaban is affected by the kidneys and may not work well to prevent blood clots from atrial fibrillation in certain people due to their kidney function. Talk to your doctor for more details and to see if this medication is right for you.

Do not stop taking edoxaban unless directed by your doctor. If you stop taking this medication early, you have a higher risk of forming a serious blood clot (such as a stroke, blood clot in the legs/lungs). Your doctor may direct you to take a different "blood thinning" or antiplatelet medication to reduce your risk. Get medical help right away if you have weakness on one side of the body, trouble speaking, sudden vision changes, confusion, chest pain, trouble breathing, or pain/warmth/swelling in the legs.

People taking this medication may bleed near the spinal cord after certain spinal procedures. Bleeding in this area can cause paralysis that lasts a long time or could become permanent. Before any spinal procedure, ask your doctor about the benefits and risks. The risk of bleeding may be higher if you have a deformed spine, or have had spinal procedures/surgery before (such as epidural catheter placement, difficult epidural/spinal puncture), or are taking other drugs that can cause bleeding/bruising (including antiplatelet drugs such as clopidogrel, "blood thinners" such as warfarin/enoxaparin, nonsteroidal anti-inflammatory drugs-NSAIDs such as ibuprofen). Tell your doctor right away if you notice symptoms such as back pain, leg numbness/tingling/weakness, loss of control of the bowels or bladder (incontinence).