Citro-Mag is used as a laxative or purgative, for preparation of the colon for X-ray examination, or to treat constipation. Medicinal Ingredients: Anhydrous magnesium citrate 15 g Non-medicinal ingredients: Natural and artificial flavouring, carbonic gas, purified water, sodium benzoate, sodium bicarbonate, and sorbitol. Warning: People on a low-sodium diet and those with poor kidney function should not use this product unless directed by a doctor. Side effects: Citro-Mag may cause abdominal cramping or nausea. If you notice rectal bleeding, or if the product does not seem to work, this may be a sign of a more serious condition. Consult your doctor. Proper use: Use only as directed. Excessive or long-term use may cause dependence for bowel function. Do not take any type of laxative for more than one week, unless directed by your physician. Do not use as a purgative unless directed to do so by your doctor.