Scientists at the Intermountain Medical Center Heart Institute in Salt Lake City, Utah, United States have red-flagged two blood pressure drugs that are themselves killers.

According to Medical News Today, scientists found that individuals with hypertension who used alpha blockers and alpha-2 agonists to control their blood pressure showed an increase in blood pressure variability, which could increase mortality risk.

Alpha blockers — which include doxazosin mesylate and prazosin hydrochloride — work by dilating the blood vessels. Alpha-2 agonists, such as methyldopa, work by targeting sympathetic nervous system activity, thereby reducing blood vessel constriction.

Scientists said the two classes of drugs are inimical to users health and should be avoided.

Lead study author Dr. Brian Clements and team have recently presented their findings at the 2018 American College of Cardiology (ACC) Scientific Sessions, held in Orlando, FL.

Blood pressure is the force of blood that pushes against the wall of the arteries. And, in November last year, the American Heart Association (AHA) and the ACC set new guidelines.