A nurse is caring for a client who is receiving diazepam as conscious sedation for an endoscopy, Which of the following antidotes should the nurse have on hand during the procedure?

Furosemide, a loop diuretic, is known to cause orthostatic hypotension as an adverse effect. It works by increasing urine output and reducing fluid volume, which can lead to a decrease in blood pressure when standing up, causing dizziness or lightheadedness.

Dabigatran (A) is an anticoagulant used to prevent blood clots and does not typically cause orthostatic hypotension as a side effect.

Levothyroxine (B) is a thyroid hormone replacement medication used to treat hypothyroidism. It does not usually cause orthostatic hypotension.

Isoproterenol (C) is a non-selective beta-adrenergic agonist that is primarily used for cardiac stimulation. It can cause tachycardia and palpitations, but orthostatic hypotension is not a common side effect.

The nurse should report a creatinine level of 2 mg/dl to the provider as a potential adverse effect of captopril. Captopril is an angiotensin-converting enzyme (ACE) inhibitor commonly used to treat congestive heart failure and hypertension. One of the side effects of ACE inhibitors, including captopril, is the potential to cause kidney problems, leading to an increase in serum creatinine levels.

An increase in serum creatinine may indicate impaired kidney function, and it is essential to monitor kidney function regularly in clients taking ACE inhibitors. Elevated creatinine levels can suggest reduced glomerular filtration rate (GFR) and impaired kidney function, which may require adjustments in medication dosage or further evaluation and management.

Let's go through the other options:

A. Absolute neutrophil count (ANC) 4.000/ mm^3: An absolute neutrophil count of 4.000/ mm^3 is within the normal range, so it is not an adverse effect of captopril that requires immediate reporting.

B. Brain natriuretic peptide (BNP) 90 ng/L: A brain natriuretic peptide (BNP) level of 90 ng/L is used to assess heart failure severity. While BNP levels can be helpful in managing congestive heart failure, a BNP level of 90 ng/L is not an adverse effect of captopril that requires immediate reporting.

C. Sodium 140 mEq/l: A sodium level of 140 mEq/L is within the normal range, so it is not an adverse effect of captopril that requires immediate reporting.