anticholinergic
Definition
- Adjective: Inhibiting or blocking the action of the neurotransmitter acetylcholine at a receptor site in the nervous system.
- Noun: A substance or drug that has an anticholinergic effect.
Usage
- As an Adjective: Used to describe drugs, effects, or properties that oppose acetylcholine.
- The doctor prescribed an anticholinergic medication to reduce stomach spasms.
- Dry mouth is a common anticholinergic side effect.
- As a Noun: Used to refer to the substance itself.
- Atropine is a potent anticholinergic.
- Some over-the-counter sleep aids contain anticholinergics.
Advanced Usage
- Anticholinergic Syndrome: A toxidrome (collection of symptoms) resulting from an overdose of anticholinergic substances. Classic symptoms are often remembered by the mnemonic: "Blind as a bat (dilated pupils), Mad as a hatter (confusion, hallucinations), Red as a beet (flushed skin), Hot as a hare (fever), Dry as a bone (dry mouth/skin), and full of Secretions (inability to sweat)."
Variants and Related Words
- Anticholinergic Agent: A more formal term for the noun, meaning a drug or chemical with anticholinergic properties.
- Antimuscarinic: A specific type of anticholinergic that blocks muscarinic acetylcholine receptors. Many common anticholinergic drugs are primarily antimuscarinic.
- Cholinergic (Adjective): The opposite; referring to cells, receptors, or drugs that use or enhance the action of acetylcholine.
Synonyms
- Adjective: Parasympatholytic (a broader term for drugs that inhibit the parasympathetic nervous system, often via anticholinergic action).
- Noun: Anticholinergic agent, antimuscarinic (in many contexts).
Related Phrases
- Anticholinergic Burden: A clinical concept referring to the cumulative effect of taking one or more medications with anticholinergic activity, which is associated with increased risk of cognitive decline and other side effects, especially in older adults.
- The pharmacist reviewed the patient's medications to assess the anticholinergic burden.
Adjective
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inhibiting or blocking the action of acetylcholine at a receptor site
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anticholinergic drugs
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Noun
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a substance that opposes or blocks the action of acetylcholine
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