Why might a doctor prescribe potassium supplements in addition to dietary potassium for a client?

The correct rationale for prescribing potassium supplements alongside dietary potassium is related to addressing low potassium levels that can occur due to diuretic therapy. Diuretics, commonly used to treat conditions such as hypertension and edema, can lead to increased urinary excretion of potassium. This loss may result in hypokalemia, a condition characterized by insufficient potassium levels in the blood, which can cause serious health issues such as muscle weakness, arrhythmias, and overall cardiovascular instability.

By providing potassium supplements, the physician aims to replenish the body's potassium stores and maintain electrolyte balance, ensuring that the client remains within a healthy range. This intervention is particularly crucial for patients who may not receive enough potassium from their diet alone, especially if their dietary intake is already low or if their condition necessitates strict fluid or dietary restrictions.

In this context, the benefits of potassium supplements become clear as a preventative measure against the adverse effects of inadequate potassium due to diuretic medications.