Which of the following medications is typically used to treat high blood pressure?

Atenolol is the medication that is typically used to treat high blood pressure. It belongs to a class of drugs known as beta-blockers, which work by blocking the effects of adrenaline on the heart and blood vessels. This leads to a decrease in heart rate and helps to relax blood vessels, ultimately lowering blood pressure.

In contrast, the other medications listed serve different purposes. Pregabalin is primarily used to treat nerve pain and epilepsy, and is not indicated for managing hypertension. Gabapentin is also used for nerve-related conditions and seizures, rather than for controlling blood pressure. Metformin is primarily utilized for managing type 2 diabetes and is not effective for treating high blood pressure. Therefore, atenolol stands out as the appropriate choice for treating hypertension.