vasoconstrictor
/ˌveɪzoʊkənˈstrɪktər/
noun
- A substance or agent that causes blood vessels to narrow, reducing blood flow.
- Caffeine acts as a mild vasoconstrictor, which is why it can help with headaches.
- Some cold medicines contain a vasoconstrictor to relieve a stuffy nose.
- The doctor used a vasoconstrictor to stop the bleeding during surgery.
Antonyms