With a prescription, potassium chloride can be purchased as an injectable, soluble powder, release tablet, or ready-made solution. Observe the directions on the manufacturer's or doctor's label. However, in the instances listed below, you should refrain from consuming potassium chloride. If you have chronic kidney illness. If you are taking other drugs that make your body produce more potassium. If you suffer from type 1 diabetes, congestive heart failure, liver disease, or adrenal insufficiency.