Can warfarin cause frank hematuria?

Warfarin can cause hematuria especially if INR>3. It can cause hematuria if INR is in the therapeutic range (2-3) too. You should confirm it's actually hematuria by letting it sit for a while. read more

Warfarin can cause hematuria especially if INR>3. It can cause hematuria if INR is in the therapeutic range (2-3) too. You should confirm it's actually hematuria by letting it sit for a while. If it deposits, it's hematuria, if not it can be coloring from food or other meds (Phenazopyridine), hemoglobinuria or myoglobinuria. A simple dipstick urine test can differentiate them. read more

Drugs — Hematuria can be caused by medications, such as blood thinners, including heparin, warfarin or aspirin-type medications, penicillins, sulfa-containing drugs and cyclophosphamide (Cytoxan). Glomerulonephritis — Glomerulonephritis is a family of illnesses that are characterized by inflammation of the glomeruli, the filtering units of the kidneys. read more

Clinical significance of hematuria in patients on anticoagulant therapy. Schuster GA, Lewis GA. We evaluated 29 consecutive patients in whom gross or microscopic hematuria developed while they were on heparin or warfarin anticoagulant therapy. read more