Sando-K Effervescent Tablets are used to treat and prevent low potassium levels. They contain the active ingredients potassium chloride and potassium bicarbonate. Sando-K Effervescent Tablets are round, white, effervescent tablets. Each tablet contains 600 mg potassium chloride Ph Eur, 400 mg potassium bicarbonate USP and 800 mg anhydrous citric acid. Sando-K is one of a group of medicines known as potassium supplements. It can be used to increase your potassium intake for the following reasons: If other medicines have caused the potassium concentration in your blood to decrease. If the concentration of potassium in your blood has decreased as a result of severe diarrhoea, vomiting or fistulas. If the concentration of potassium in your blood has decreased as the result of metabolic disturbances in your body. If your normal potassium intake is low eg if you have malnutrition, alcoholism or a deficient diet. If the concentration of potassium in your blood is low as a result of a low chloride concentration in your blood.