Which drug is indicated for detrusor muscle atony?

Bethanechol is indicated for detrusor muscle atony because it is a muscarinic cholinergic agonist that stimulates the bladder's smooth muscle. In cases of detrusor muscle atony, which is characterized by an inability to contract the bladder effectively, this stimulation enhances bladder contraction and facilitates urination. Bethanechol specifically targets the muscarinic receptors in the bladder, promoting the contraction of the detrusor muscle, thereby improving urinary bladder function.

The other options do not serve the same purpose. Neostigmine is primarily used as a treatment for myasthenia gravis and promotes increased acetylcholine at the neuromuscular junction, but it is not specifically indicated for bladder atony. Oxybutynin is an anticholinergic medication used primarily to treat overactive bladder and would inhibit detrusor contraction rather than stimulate it. Propofol, on the other hand, is an anesthetic agent with no role in the management of bladder muscle tone. Thus, bethanechol is the most appropriate choice for addressing detrusor muscle atony.