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# Types of Antagonist 1. **Competitive antagonists**: If the antagonist binds to the same site on the receptor as the agonist in a reversible manner. 2. **Irreversible antagonists**: bind covalently to the active site of the receptor, thereby permanently reducing the number of receptors available...

# Types of Antagonist 1. **Competitive antagonists**: If the antagonist binds to the same site on the receptor as the agonist in a reversible manner. 2. **Irreversible antagonists**: bind covalently to the active site of the receptor, thereby permanently reducing the number of receptors available to the agonist. 3. **Allosteric antagonists**: An allosteric antagonist binds to a site (allosteric site) other than the agonist-binding site and prevents receptor activation by the agonist. 4. **Functional antagonists**: initiating effects that are functionally opposite those of the agonist.