A drug designed to fight anemia appears to double the risk of stroke in patients with diabetes and kidney disease without substantially improving their quality of life, a new study finds.
Darbepoetin alfa, marketed as Aranesp and known as an erythropoiesis-stimulating agent (ESA), is often prescribed for diabetic patients with chronic kidney disease and mild anemia.
“The benefits we assumed we would have by treating anemia were less striking and the risks were more striking,” said lead researcher Dr. Marc A. Pfeffer, a professor of medicine in the cardiovascular division of Brigham and Women’s Hospital in Boston.
“This provides new data for doctors and patients to make their own risk-benefit assessment,” he said. “There was a perception that treating anemia would make people feel so much better that we’ll take risks, but the benefit in quality of life was not as great as we thought, and there was a clear doubling of your risk for a stroke.”