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In the treatment of organophosphate toxicity, cholinesterase reactivators such as Pralidoxime reactivate inhibited AChE at peripheral nicotinic receptors.Since AChE mediates effects on both nicotinic and muscarinic receptors, cholinesterase reactivators are co-administered with muscarinic antagonists, primarily atropine.
Flaccid paralysis resulting from cholinergic crisis can be distinguished from myasthenia gravis by the use of the drug edrophonium (Tensilon), as it only worsens the paralysis caused by cholinergic crisis but strengthens the muscle response in the case of myasthenia gravis. (Edrophonium is a cholinesterase inhibitor, hence increases the ...
Reversible acetylcholinesterase inhibitor agents such as physostigmine can be used as an antidote in life-threatening cases. Wider use is discouraged due to the significant side effects related to cholinergic excess including seizures, muscle weakness, bradycardia, bronchoconstriction, lacrimation, salivation, bronchorrhea, vomiting, and diarrhea.
For people affected by cholinergic syndrome, atropine sulfate combined with an oxime is used to combat the effects of the acute OP poisoning. Diazepam is sometimes also administered if convulsions or muscle fasciculations begin. [16] The intermediate syndrome (IMS) appears in the interval between the end of the cholinergic crisis and the onset ...
In pediatrics, it has been used for children with dystonia due to cerebral palsy, [8] [9] [10] and to control drooling. [11] In organophosphate poisoning, trihexyphenidyl is a more effective antidote than atropine to counteract the cholinergic crisis, seizures, and neuropathology. [12]
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Some phosphate-acetylcholinesterase conjugates continue to react after the phosphate docks to the esteric site, evolving into a more recalcitrant state. This process is known as aging. Aged phosphate-acetylcholinesterase conjugate is resistant to antidotes such as pralidoxime.