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Anticholinergic overdose, both antinicotinic and antimuscarinic, can exert toxic effects on both central and peripheral systems. The following symptoms could be presented: [21] [22] Mydriasis. Mild symptoms include tachycardia, flushed face, mydriasis and blurred vision, fever, dry mouth
Mydriasis can be induced via modulation of adrenergic or cholinergic signalling. Drugs that can cause mydriasis include: Stimulants (typically monoaminergics) such as amphetamines, cocaine, MDMA, and mephedrone. Anticholinergics such as diphenhydramine, atropine, hyoscyamine, and scopolamine antagonize the muscarinic acetylcholine receptors in
Anticholinergics (anticholinergic agents) are substances that block the action of the acetylcholine (ACh) neurotransmitter at synapses in the central and peripheral nervous system. [ 1 ] [ 2 ] These agents inhibit the parasympathetic nervous system by selectively blocking the binding of ACh to its receptor in nerve cells .
produce mydriasis and cycloplegia in diagnostics [5] may cause ocular hypertension [5] Short acting, CD [5] Diphenhydramine: NS: for EPS from typical and atypical antipsychotic medications; antihistamine; sleep aid; PD; management of asthma symptoms; sedation; dry mouth; constipation; UR; Acts in the central nervous system, blood vessels and ...
[1] [2] Patients observe these symptoms and seek medical advice from healthcare professionals. Because most people are not diagnostically trained or knowledgeable, they typically describe their symptoms in layman's terms, rather than using specific medical terminology. This list is not exhaustive.
"Given all the research evidence, physicians might want to consider alternatives to anticholinergic medications, if available, when working with older patients," a researcher told CNN.
Onset of symptoms is typically within a day of the extra serotonin. [2] Diagnosis is based on a person's symptoms and history of medication use. [2] Other conditions that can produce similar symptoms such as neuroleptic malignant syndrome, malignant hyperthermia, anticholinergic toxicity, heat stroke, and meningitis should be ruled out. [2]
Diphenhydramine is a potent antimuscarinic (a competitive antagonist of muscarinic acetylcholine receptors) and, as such, at high doses can cause anticholinergic syndrome. [68] The utility of diphenhydramine as an antiparkinson agent is the result of its blocking properties on the muscarinic acetylcholine receptors in the brain.