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When an acetylcholinesterase (AChE) inhibitor binds with acetylcholinesterase, regardless of whether it is reversible or irreversible, it prevents the ability of AChE to bind with acetylcholine (ACh) and break it down. Therefore, ACh accumulates in the synaptic gap, causing the postsynaptic neuron or muscle cell to fire/contract repeatedly. As this happens, a fatigue effect is reached due to depletion of chemical energy stores (ATP, etc.), and weakness results from the reduced ability of neurons/muscles to respond to further stimulation.

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11y ago
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4mo ago

The mechanism of acetylcholinesterase (AChE) inhibitor side effects such as weakness is due to excessive accumulation of acetylcholine at cholinergic synapses. This leads to overstimulation of muscarinic and nicotinic receptors, causing symptoms like muscle weakness. The excess acetylcholine can also affect neuromuscular junction function, contributing to weakness.

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Q: What is the mechanism of AchE inhibitor side effects of weakness?
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