Cardiologists discover cancer risks in blood pressure meds

This class of drugs is used by millions of patients not only for high blood pressure but also for heart failure, cardiovascular risk reduction and diabetic kidney disease.

University Hospitals Harrington-McLaughlin Heart & Vascular Institute's Drs. Ilke Sipahi, Daniel I. Simon and James C. Fang recently completed a meta-analysis of over 60,000 patients randomly assigned to take either an ARB or a control medication. Their findings are published online today at The Lancet Oncology.

The researchers found that patients randomized to ARBs has “significantly increased risk of new cancer” compared to control patients.

“We have found the risk of new cancers was increased with these medications by 8-11 percent,” said Dr. Ilke Sipahi, associate director of heart failure and transplantation and assistant professor at Case Western Reserve University School of Medicine. “Most importantly, risk of lung cancer was increased by 25 percent.”

However, the research did not establish any link between ARBs and other types of cancer such breast cancer.

“This is the first time an association between ARBs and cancer development is suggested,” Dr. Sipahi continued. “While our findings are robust, they need to be replicated in other studies before they can be considered as definitive.”

Before this study, there were no major safety concerns with ARBs except for their use in pregnancy and in patients with chronic kidney or blockages of kidney arteries. Interestingly, previous animal studies with ARBs have been negative for cancer development.

“In medicine, physicians must balance the benefits and risks of all drug and device therapies,” said Dr. Daniel Simon, director of the Harrington-McLaughlin Heart & Vascular Institute at University Hospitals Case Medical Center and professor at Case Western Reserve University School of Medicine. “We recommend that patients discuss the findings of this study with their physicians since ARBs are effective agents in the treatment of high blood pressure and heart failure. Meta-analyses are a powerful tool to look at low frequency safety signals, but require confirmation with other approaches, such as large national health and managed care registries.”

About University Hospitals

University Hospitals serves the needs of patients through an integrated network of hospitals, outpatient centers and primary care physicians. At the core of our health system is University Hospitals Case Medical Center. The primary affiliate of Case Western Reserve University School of Medicine, University Hospitals Case Medical Center is home to some of the most prestigious clinical and research centers of excellence in the nation and the world, including cancer, pediatrics, women's health, orthopedics and spine, radiology and radiation oncology, neurosurgery and neuroscience, cardiology and cardiovascular surgery, organ transplantation and human genetics. Its main campus includes the internationally celebrated UH Rainbow Babies & Children's Hospital, ranked second in the nation for the care of critically ill newborns; UH MacDonald Women's Hospital, Ohio's only hospital for women; and UH Ireland Cancer Center, part of the NCI-designated Case Comprehensive Cancer Center. For more information, go to www.uhhospitals.org