A member asked:

Why is propranolol prescribed for angina if it constricts blood vessels? i thought you wanted vasodilators for angina, like ccbs.

4 doctors weighed in across 3 answers
Dr. Calvin Weisberger answered

Specializes in

Propranolol: Vasoconstriction with propranolol is quite minor. The rate slowing is far more significant to helping angina.

Answered 8/2/2015

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Dr. Roy Arnold answered

Specializes in Internal Medicine

Afterload reduction: Propranolol reduces the workload on the heart muscle and slows the heart rate, allowing more blood flow during diastole, thereby reducing ischemia. Persons who have a myocardial infarction (heart attack) are less likely to have a second if treated with beta blockers like propranolol. Thanks for trusting HealthTap!

Answered 8/3/2015

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Dr. Akbar Zikria answered

Specializes in Family Medicine

Oxygen to the heart!: Propranol is a non-selective beta blocker in that it blocks beta 1 and beta 2 receptors. By blocking beta 1 it helps to slow down the heart allowing more blood to fill the chambers. By blocking beta 2 it constricts the coronary arteries allowing for more oxygenated blood to supply the heart muscles. CCBs work strictly on slowing down the heart and may be used in conjunction with beta blockers

Answered 8/3/2015

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