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  • ARBs vs ACE Inhibitors...

ARBs vs ACE Inhibitors as First-Line Treatment of hypertension: Study

Written By : Hina Zahid |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2021-07-27T10:00:36+05:30  |  Updated On 27 July 2021 12:50 PM IST
ARBs vs ACE Inhibitors as First-Line Treatment of hypertension: Study
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YORK, NY - Angiotensin receptor blockers and angiotensin-converting enzyme inhibitors are first line drugs for controlling high blood pressure.

People who are just beginning treatment for high blood pressure can benefit equally from two different classes of medicine - angiotensin-converting enzyme (ACE) inhibitors and angiotensin receptor blockers (ARBs) - yet ARBs may be less likely to cause medication side effects, according to an analysis of real-world data published today in Hypertension, an American Heart Association journal.

Researchers at Columbia University Vagelos College of Physicians and Surgeons have found in an analysis of almost 3 million patients taking a single high blood pressure medication for the first time, angiotensin receptor blockers (ARBs) were as good as angiotensin-converting enzyme (ACE) inhibitors at preventing cardiovascular events linked to hypertension, including heart attack, stroke and heart failure. But more popular one i.e ACE inhibitors cause slightly more side effects.

Two types of drugs that are recommended as a first treatment for patients with high blood pressure were found equally effective in improving cardiovascular outcomes, but the more popular type causes slightly more side effects, finds a multinational observational study led by researchers at Columbia University Vagelos College of Physicians and Surgeons.

The study, which analyzed claims and electronic health data from millions of patients worldwide, is the largest to compare the safety and efficacy of angiotensin-converting enzyme (ACE) inhibitors and angiotensin receptor blockers (ARBs), two commonly prescribed antihypertensive drugs.

"Physicians in the United States and Europe overwhelmingly prescribe ACE inhibitors, simply because the drugs have been around longer and tend to be less expensive than ARBs," says George Hripcsak, MD, the Vivian Beaumont Allen Professor and chair of biomedical informatics at Columbia University Vagelos College of Physicians and Surgeons and senior author of the study.

"But our study shows that ARBs are associated with fewer side effects than ACE inhibitors. The study focused on first-time users of these drugs. If you're just starting drug therapy for hypertension, you might consider trying an ARB first. If you're already taking an ACE inhibitor and you're not having any side effects, there is nothing that we found that would indicate a need for a change."

The study was published online in Hypertension.

Narrowing Down Choices

Once a physician decides to prescribe medication to control a patient's high blood pressure, the next decision--which one to choose--is complicated.

"U.S. and European hypertension guidelines list 30 medications from five different drug classes as possible choices, yet there are very few head-to-head studies to help physicians determine which ones are better," Hripcsak says. "In our research, we are trying to fill in this information gap with real-world observational data."

ACE inhibitors and ARBs are among the choices, and they have a similar mechanism of action. Both reduce the risk of stroke and heart attacks, though it's known that ACE inhibitors are associated with increased risk of cough and angioedema (severe swelling in the face and airways).

"We wanted to see if there were any surprises--were both drug classes equally effective, and were ARBs producing any unexpected side effects when used in the real world?" Hripcsak says. "We're unlikely to see head-to-head clinical trials comparing the two since we are reasonably sure that both are effective."

Electronic Health Records Provide Answer

The researchers instead turned to large databases to answer their questions. They analyzed insurance claims and electronic health records from approximately 3 million patients in Europe, Korea, and the United States who were starting antihypertensive treatment with either an ACE inhibitor or an ARB.

Data from electronic health records and insurance claims are challenging to use in research. They can be inaccurate, incomplete, and contain information that biases the results. So the researchers employed a variety of cutting-edge mathematical techniques developed by the Observational Health Data Science and Informatics (OHDSI) collaborative network to dramatically reduce bias and balance the two treatment groups as if they had been enrolled in a prospective study.

Using this approach, the researchers tracked four cardiovascular outcomes--heart attack, heart failure, stroke, and sudden cardiac death--and 51 adverse events in patients after they started antihypertensive treatment.

The researchers found that the vast majority of patients--2.3 million--were prescribed an ACE inhibitor. There were no significant differences between the two drug classes in reducing the risk of major cardiovascular complications in people with hypertension. Patients taking ACE inhibitors had a higher risk of cough and angioedema, but the study also found they had a slightly higher risk of pancreatitis and gastrointestinal bleeding.

"Our study largely confirmed that both antihypertensive drug classes are similarly effective, though ARBs may be a little safer than ACE inhibitors," Hripcsak says. "This provides that extra bit of evidence that may make physicians feel more comfortable about prescribing ARBs versus ACE inhibitors when initiating monotherapy for patients with hypertension. And it shows that large-scale observational studies such as this can offer important insight in choosing among different treatment options in the absence of large randomized clinical trials."

Angiotensin receptor blockersACE inhibitorsHypertensionBP drugblood pressureangiotensin receptor blockers
Source : Hypertension
Hina Zahid
Hina Zahid

    Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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