About Potassium chloride Electrolyte replenisher, Potassium supplement. Mechanism of Action of Potassium chloride Potassium chloride is used when the action of potassium cation is desired.It is used in the treatment of hypokalaemia or hypochloremic alkalosis exist in association with prolonged diarrhea or vomiting or consequent to adrenal steroid therapy or treatment with thiazide diuretics.It is usually given along with Sodium chloride and other electrolytes.It is used in the treatment of digitalis intoxication.An increase in daily intake of potassium will decrease the risk of stroke associated mortality. Contact lenses cleaning solutions: It is an ingredient in contact lenses cleaning solutions.