Meaning & use
vasoconstrictor
Last updated
A substance or nerve that causes blood vessels to narrow, reducing blood flow.
See it in a sentence
Caffeine acts as a mild vasoconstrictor, which is why it's sometimes added to headache medicine.
Doctors may use a vasoconstrictor to help control bleeding during surgery.
A note on using this word
The opposite of a vasodilator, which widens blood vessels rather than narrowing them.
Words with an opposite meaning
vasodilator
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