![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Agonist_%2526_Antagonist.jpg/640px-Agonist_%2526_Antagonist.jpg&w=640&q=50)
Agonist-antagonist
Type of drug / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Agonist–antagonist?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
In pharmacology the term agonist-antagonist or mixed agonist/antagonist is used to refer to a drug which under some conditions behaves as an agonist (a substance that fully activates the receptor that it binds to) while under other conditions, behaves as an antagonist (a substance that binds to a receptor but does not activate and can block the activity of other agonists).
![The figure shows the difference in action between an agonist and an antagonist, compared to native neurotransmitter function.](http://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Agonist_%26_Antagonist.jpg/640px-Agonist_%26_Antagonist.jpg)
Types of mixed agonist/antagonist include receptor ligands that act as agonist for some receptor types and antagonist for others[1] or agonist in some tissues while antagonist in others (also known as selective receptor modulators).