The nurse is preparing to administer medications to the following clients. Which medication should the nurse question administering? 1. The loop diuretic furosemide (Lasix) to a client with a serum...

The nurse is preparing to administer medications to the following clients. Which medication should the nurse question administering?

1. The loop diuretic furosemide (Lasix) to a client with a serum potassium level of 4.2 mEq/L. 2. The osmotic diuretic mannitol (Osmitrol) to a client with a serum osmolality of 280 mOsm/kg. 3. The cardiac glycoside digoxin (Lanoxin) to a client with a digoxin level of 2.4 mg/dL. 4. The anticonvulsant phenytoin (Dilantin) to a client with a Dilantin level of 14 μg/mL.