A nurse is caring for a client who has been taking lisinopril for several months. The nurse should plan to check which of the following laboratory values to monitor for adverse effects of the medication?

A. "Calcium": Lisinopril does not significantly affect calcium levels. While calcium monitoring is important in some conditions, it is not a primary concern with lisinopril therapy. B. "Sodium": Lisinopril typically does not affect sodium levels directly. Monitoring sodium is important in some medical conditions but is not a priority for lisinopril-related adverse effects. C. "Potassium": Lisinopril, an ACE inhibitor, can increase potassium levels, leading to hyperkalemia, a potentially serious adverse effect. Monitoring potassium is essential to prevent complications such as arrhythmias. D. "Magnesium": Magnesium is not typically affected by lisinopril. While it is important to monitor electrolytes, magnesium levels are not a primary concern with this medication.