MedicalTerminology DB
General Medical Terms

antagonist

/ /•

1 Definition of antagonist

Meaning of antagonist: In medicine, a substance that stops the action or effect of another substance.

In medicine, a substance that stops the action or effect of another substance. For example, a drug that blocks the stimulating effect of estrogen on a tumor cell is called an estrogen receptor antagonist.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.