Therapeutic use of propranolol

Hello! Let's work through this pharmacology question together. We need to identify the therapeutic use of the drug propranolol among the given options.

To solve this, we first need to identify the drug class for propranolol. Drugs ending in 'lol' are typically beta-blockers.

Specifically, propranolol is a non-selective beta-blocker. This means it blocks both beta 1 receptors, which are primarily in the heart, and beta 2 receptors, found in the lungs and other areas.

Now, let's look at the physiological effects of blocking these receptors. When we block beta 1 receptors in the heart, it results in a negative inotropic and chronotropic effect.

These combined effects lead to a reduction in cardiac output, which ultimately decreases blood pressure.