This drug is usually indicated for postoperative and postpartum urinary retention as well as bladder atony.*1 pointCarbacholBethanecholTacrinePyridostigmine

The question is asking which drug is typically used for postoperative and postpartum urinary retention as well as bladder atony. The options are Carbachol, Bethanechol, Tacrine, and Pyridostigmine.

1. Carbachol: This is a direct-acting cholinergic agonist, primarily used in the treatment of glaucoma.

2. Bethanechol: This is a direct-acting cholinergic agonist that stimulates the bladder muscle to improve urine flow. It is often used to treat urinary retention without obstruction, such as after surgery or childbirth, or in conditions where the bladder muscle needs to be strengthened.

3. Tacrine: This is a centrally acting cholinesterase inhibitor used in the treatment of Alzheimer's disease, not typically used for urinary retention or bladder atony.

4. Pyridostigmine: This is an indirect-acting cholinergic agonist used primarily to treat myasthenia gravis, not typically used for urinary retention or bladder atony.

So, the answer is Bethanechol. It is typically used for postoperative and postpartum urinary retention as well as bladder atony.