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In the Industry Vocabulary Test
partial agonist
Medication that activates receptors to a lesser degree than full agonists, providing therapeutic effect with reduced risk.
Full Definition
A partial agonist is a type of medication that binds to and activates receptors but produces a submaximal response compared to full agonists. In addiction medicine, buprenorphine is the primary example, acting as a partial opioid agonist. This mechanism provides sufficient activation to prevent withdrawal and reduce cravings while creating a 'ceiling effect' that limits respiratory depression and euphoria, making it safer than full opioid agonists like methadone.
Usage
Usage note: Emphasize mechanistic distinction from full agonists; explain ceiling effect concept.
In Context
- "Buprenorphine's partial agonist properties provide a safety advantage over methadone." — Pharmacology education material
- "The partial agonist mechanism explains why patients may experience precipitated withdrawal." — Clinical consultation note
Contrasted with
full agonist
antagonist
Don't confuse with
full agonist
mixed agonist
antagonist