A patient with non-obstructive urinary retention is prescribed Bethanechol. What is the expected physiological effect on the bladder?
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Correct answer: Contraction of the detrusor muscle and relaxation of the trigone
Muscarinic stimulation by Bethanechol causes the detrusor muscle to contract and the internal urethral sphincter (trigone) to relax. This coordinated action facilitates bladder emptying in patients with atony.
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