Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

Binds to the same receptor site and is an agent or drug, it becomes another agent but produces an opposite effect. Example drug x binds to receptor site A and potentiates the release of a neurotransmitter, drug X is an agonist at that receptor site.

INVERSE AGONIST: "Inverse Agonist is a drug that binds to the same receptor site as another agent"

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