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Atropine is often used in conjunction with the oxime pralidoxime chloride. Some of the nerve agents attack and destroy acetylcholinesterase by phosphorylation, so the action of acetylcholine becomes excessive and prolonged. Pralidoxime (2-PAM) can be effective against organophosphate poisoning because it can re-cleave this phosphorylation.
The health effects associated with organophosphate poisoning are a result of excess acetylcholine (ACh) present at different nerve synapses and neuromuscular junctions across the body. Specifically, acetylcholinesterase (AChE), the enzyme that normally and constantly breaks down acetylcholine, is inhibited by the organophosphate substance.
As a result of cholinergic crisis, the muscles stop responding to the high synaptic levels of acetylcholine, leading to flaccid paralysis, respiratory failure, and other signs and symptoms reminiscent of organophosphate poisoning. Other symptoms include increased sweating, salivation, bronchial secretions along with miosis (constricted pupils).
Organophosphate based nerve agent poisoning, such as VX, sarin, tabun, and soman (atropine is favoured in conjunction with an oxime, usually pralidoxime) [6] [7] Anticholinergics generally have antisialagogue effects (decreasing saliva production), and most produce some level of sedation, both being advantageous in surgical procedures. [8] [9]
Atropine, however, is difficult to administer safely, because its effective dose for nerve agent poisoning is close to the dose at which patients suffer severe side effects, such as changes in heart rate and thickening of the bronchial secretions, which fill the lungs of someone suffering nerve agent poisoning so that suctioning of these ...
Atropine, which is choice of drug to antagonise the muscarinic effects of organophosphates, is administered even before pralidoxime during the treatment of organophosphate poisoning. While the efficacy of atropine has been well-established, clinical experience with pralidoxime has led to widespread doubt about its efficacy in treatment of ...
Side effects similar to atropine; Prevention drug for motion sickness instead of treatment medication; Tiotropium: Similar to atropine; Does not inhibit bronchial mucociliary clearance; Poor absorption; Asthma and Chronic Obstructive Pulmonary Disease (COPD) Dilate airway by relaxing bronchial smooth muscles; Quaternary ammonium compound ...
Organophosphate-induced delayed neuropathy (OPIDN), also called organophosphate-induced delayed polyneuropathy (OPIDP), is a neuropathy caused by killing of neurons in the central nervous system, especially in the spinal cord, as a result of acute or chronic organophosphate poisoning.