The nurse is teaching a patient about the anticholinergic agent prescribed for urinary retention. Which statement by the patient indicates a need for further teaching?

Choice B rationale Patients taking medications that inhibit parasympathetic signals often experience systemic drying effects. Restricting water intake would exacerbate dehydration and concentrate the urine, increasing the risk of further urinary tract irritation or constipation. Patients should be encouraged to maintain adequate hydration to manage the side effects of the medication. This statement reflects a misunderstanding of how to manage the common adverse effect of xerostomia associated with the blockage of muscarinic receptors. Choice A rationale These medications can cause mydriasis and cycloplegia by relaxing the ciliary muscle, which leads to a loss of visual accommodation. This can result in significant blurring, especially when trying to focus on near objects or during sudden changes in light. The patient's statement about avoiding dangerous activities like operating a vehicle is correct and demonstrates an understanding of safety precautions. This is a common and expected side effect of blocking cholinergic transmission. Choice C rationale Constipation is a very common side effect of this drug class because it decreases the motility of the smooth muscle in the gastrointestinal tract. Increasing the intake of dietary fiber through the consumption of natural produce helps stimulate peristalsis and maintain regular bowel movements. This statement indicates that the patient understands how to use lifestyle modifications to counteract the slow gastric emptying and intestinal transit times caused by the anticholinergic pharmacological action. Choice D rationale Salivary gland secretion is mediated by cholinergic receptors, so blocking these receptors leads to a significant reduction in saliva production. This results in a dry mouth, which can be uncomfortable and increase the risk of oral infections or dental caries. Stimulating the flow of saliva through mechanical means, such as using sugarless sweets or chewing gum, is an appropriate and recommended self-care strategy. The patient's intent shows they have correctly integrated this teaching.