**Core Concept**
Amphotericin B is an antifungal medication known to cause hypokalemia (low potassium levels) as a side effect due to its mechanism of action. It increases potassium permeability in cell membranes, leading to excessive potassium excretion in the urine.

**Why the Correct Answer is Right**
The total parenteral potassium supplementation required is calculated based on the severity of hypokalemia. For a patient with a serum potassium level of 2.3 mEq/dL, the recommended correction rate is 0.5 mEq/kg/hour. This rate should not exceed 20 mEq/hour. To calculate the total parenteral potassium supplementation for the next 24 hours, we need to consider the patient's weight and the desired potassium level.

Assuming a typical adult weight of 70 kg, and aiming for a serum potassium level of 4.5 mEq/dL, we can calculate the total potassium deficit and the required supplementation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not take into account the patient's weight and the desired potassium level.
**Option B:** This option is incorrect because the recommended correction rate of 0.5 mEq/kg/hour is not applied correctly.
**Option C:** This option is incorrect because the calculation is incomplete and does not consider the patient's weight and the desired potassium level.

**Clinical Pearl / High-Yield Fact**
To avoid hypokalemia during amphotericin B therapy, it is essential to monitor serum potassium levels regularly and supplement potassium as needed. Additionally, administering potassium supplements during the infusion of amphotericin B can help mitigate potassium loss.

**Correct Answer: C. 20 mEq/hour x 24 hours = 480 mEq, however, this is not the best answer since the patient will require more potassium to reach desired levels. A more accurate calculation is 20 mEq/hour x 24 hours = 480 mEq, but this value should be divided by the patients weight and the desired potassium level. For example, 20 mEq/hour x 24 hours = 480 mEq, then 480 mEq / 70 kg = 6.86 mEq/kg, then 6.86 mEq/kg x 4.2 mEq/L = 28.7 mEq/L, so the patient would need 28.7 mEq/L - 2.3 mEq/L = 26.4 mEq/L over 24 hours.**