Which medication is specifically classified as an antihypertensive?

Lisinopril is classified as an antihypertensive medication because it belongs to a group of drugs known as ACE (Angiotensin-Converting Enzyme) inhibitors. These medications work by relaxing blood vessels, which helps to reduce blood pressure and improve blood flow. They achieve this by inhibiting the action of the enzyme that converts angiotensin I to angiotensin II, a substance that normally narrows blood vessels.

Antihypertensives are specifically designed for the management of hypertension (high blood pressure) and are essential for preventing complications such as stroke, heart attack, and kidney disease. Lisinopril is commonly prescribed for patients with hypertension as part of a broader treatment plan that may include lifestyle changes.

The other medications mentioned are not classified as antihypertensives. Dilantin (phenytoin) is primarily used as an anticonvulsant to control seizures, Coumadin (warfarin) is an anticoagulant used to prevent and treat blood clots, and Depakote (valproic acid) is mainly an anticonvulsant and mood stabilizer. Each of these has distinct therapeutic uses, but none serve the specific purpose of lowering blood pressure like lisinopril does.