Which substance is a potassium supplement?

Potassium Chloride is indeed a potassium supplement, which is essential for maintaining various physiological functions in the body, including nerve transmission, muscle contraction, and maintaining proper fluid balance. It is often prescribed to individuals who have low potassium levels (hypokalemia) due to conditions such as prolonged vomiting, diarrhea, or certain medications that can cause potassium loss.

The other substances listed do not serve as potassium supplements. Albuterol Sulfate is a bronchodilator used primarily for treating asthma and other respiratory conditions. Amlodipine Besylate is a calcium channel blocker used to treat high blood pressure and angina. Alprazolam is a benzodiazepine used for anxiety disorders. None of these are connected with potassium supplementation, which further highlights the significance of Potassium Chloride as the correct answer for this question.