What drug can be given to treat urinary retention in patients with multiple sclerosis?

The correct choice is Urecholine, which contains bethanechol as its active ingredient. This medication is a cholinergic agent that stimulates the bladder muscle, promoting urination. In patients with multiple sclerosis, urinary retention can be a common issue due to neurological impairment affecting bladder function. By enhancing bladder contraction, Urecholine helps facilitate the process of urination, providing effective relief for those experiencing urinary retention.

Other medications listed do not effectively address urinary retention in the context of multiple sclerosis. Oxybutynin, for instance, is an anticholinergic drug often used to treat overactive bladder, but it can actually worsen urinary retention by inhibiting bladder contractions. Prasozin is primarily prescribed for hypertension and can have minimal effects on bladder function, while phenylephrine is a decongestant and vasopressor that may potentially exacerbate urinary retention rather than alleviate it. Therefore, Urecholine stands out as the appropriate choice for managing urinary retention in this patient population.