A nurse is collecting data from a client who is taking levodopa-carbidopa to treat Parkinson's disease. Which of the following findings should the nurse document as an adverse effect of this medication?

A. Bradycardia is not a common adverse effect of levodopa-carbidopa. Instead, it may sometimes cause tachycardia (increased heart rate) in some patients. Monitoring for cardiovascular changes is essential, but bradycardia is not typically associated with this medication. B. Hypotension is a documented adverse effect of levodopa-carbidopa. This medication can cause orthostatic hypotension, which is a drop in blood pressure when standing up, leading to dizziness or fainting. This finding should be carefully monitored and documented, as it can increase the risk of falls. C. Constricted pupils are not typically an adverse effect of levodopa-carbidopa. Instead, this medication may cause dilated pupils (mydriasis) as a result of its effects on the autonomic nervous system, particularly if the patient is taking other medications that can affect pupil size. D. Urinary frequency can occur with levodopa-carbidopa; however, it is not commonly classified as a significant adverse effect. While changes in urinary habits can happen, they are more often related to Parkinson's disease itself rather than the medication specifically. Therefore, urinary frequency should be monitored but is not a primary concern compared to hypotension.