Certified Aesthetic Nurse Specialist (CANS)

A patient asks why Botox causes muscle relaxation. Which mechanism best explains onabotulinumtoxinA's action?

Blocks nicotinic acetylcholine receptors postsynaptically Inhibits SNARE protein complex, preventing acetylcholine vesicle fusion Depletes presynaptic acetylcholine stores permanently Competitively inhibits acetylcholinesterase at the NMJ

Correct Answer:

Inhibits SNARE protein complex, preventing acetylcholine vesicle fusion

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