It says that in Cholinomimetic agents you should watch for exacerbation of COPD, asthma, and peptic ulcers in susceptible patients. I think this is what makes Bethanechol a contraindication. Bethanechol activates the bladder smooth muscle which would help urinary retention. I think this is what makes Bethanechol an indication.
FA 2019 p. 240
It says that in Cholinomimetic agents you should watch for exacerbation of COPD, asthma, and peptic ulcers in susceptible patients. I think this is what makes Bethanechol a contraindication. Bethanechol activates the bladder smooth muscle which would help urinary retention. I think this is what makes Bethanechol an indication.