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NBME 24 Answers

nbme24/Block 2/Question#43

A 35-year-old woman has difficulty urinating 2 days ...

Parasympathomimetic stimulation

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submitted by beeip(56),

Can anyone explain what they're getting at here? How can bethanechol be indicated and contraindicated?

sniperx3  I think it's because Bethanechol acts on M3 receptors which can treat her urinary problems but it might exacerbate her asthma symptoms since there are M3 receptors on the lungs. +10  

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submitted by coolcatac(5),

They are asking, in a complicated way, the mode of action of Bethanechol. All the other options are not muscarinic receptors except parasympathetic stimulation.