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. 51 possible side effects and safety concerns were examined: The patients taking ARBs were found to be significantly less likely to develop tissue swelling, cough, pancreas inflammation and bleeding in the digestive tract.