vasodilator
/ˌveɪzoʊˈdaɪleɪtər/
noun
- A substance or drug that widens blood vessels, increasing blood flow.
- Nitroglycerin is a common vasodilator used to treat chest pain.
- The doctor explained that a vasodilator can help reduce high blood pressure by relaxing the arteries.
- Some natural vasodilators, like certain herbs, are used in alternative medicine.
Antonyms