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Depolarizing blocking agents work by depolarizing the plasma membrane of the muscle fiber, similar to acetylcholine. However, these agents are more resistant to degradation by acetylcholinesterase , the enzyme responsible for degrading acetylcholine, and can thus more persistently depolarize the muscle fibers.
Consequently, depolarizing and muscle-contracting effects are decreased. Non-depolarizing neuromuscular blockers are generally reversible, and hence have no permanent effects on acetylcholine receptors. [1] [4] Unlike depolarizing neuromuscular blockers, non-depolarizing drugs do not produce conformational changes to the receptor. [1]
A muscle relaxant is a drug that affects skeletal muscle function and decreases the muscle tone. It may be used to alleviate symptoms such as muscle spasms , pain , and hyperreflexia . The term "muscle relaxant" is used to refer to two major therapeutic groups: neuromuscular blockers and spasmolytics .
Rocuronium bromide is a competitive antagonist for the nicotinic acetylcholine receptors at the neuromuscular junction. Of the neuromuscular-blocking drugs it is considered to be a non-depolarizing neuromuscular junction blocker, because it acts by dampening the receptor action causing muscle relaxation, instead of continual depolarisation which is the mechanism of action of the depolarizing ...
With further administration of depolarizing neuromuscular blocking agent, an effect that is similar to the response of muscle to non-depolarizing neuromuscular blocking agents can be observed. This response, termed phase 2 block, will demonstrate similar fade under tetanic stimulation, a diminishing response to tetanic stimulation where the ...
The majority of these are non-depolarising skeletal muscle relaxants for surgical use that are structurally related to curare. Several are depolarizing agents. Several are depolarizing agents. Examples
Mivacurium chloride (formerly recognized as BW1090U81, BW B1090U or BW1090U) is a short-duration non-depolarizing neuromuscular-blocking drug [1] or skeletal muscle relaxant in the category of non-depolarizing neuromuscular-blocking drugs, [2] used adjunctively in anesthesia to facilitate endotracheal intubation [3] and to provide skeletal muscle relaxation during surgery or mechanical ...
[10] Another study showed that hiccups accompanied by vomiting, insomnia, shortness of breath can also be relieved by the nondepolarizing muscle relaxant, cisatracurium, during total intravenous anesthesia. [11]