If prescribed bethanechol chloride for urinary retention, which condition would contraindicate its use?

Bethanechol chloride is a medication that acts as a cholinergic agonist, stimulating the parasympathetic nervous system to promote bladder contraction and facilitate urination. However, its use is contraindicated in conditions that may exacerbate urinary obstruction.

In the case of urinary strictures, the presence of a narrowing in the urethra can impede normal urine flow. Using bethanechol in this situation could worsen urinary retention or cause further complications, such as bladder or urethral distention, leading to pain or potential injury. Therefore, patients with urinary strictures must avoid this medication to prevent worsening their condition.

Other conditions, while they may require caution or monitoring when using bethanechol, do not present the same direct contraindication as urinary strictures do. For instance, diabetes, heart failure, or glaucoma might present considerations for careful dosing or monitoring, but they do not inherently obstruct urine flow as urinary strictures do.