When using this product - do not take more than directed, do not take at the same time as aluminum or magnesium antacids, do not take with fruit juices (see directions). Stop use and ask a doctor if an allergic reaction to this product occurs. Seek medical help right away. Do not use if you have ever had an allergic reaction to this product or any of its ingredients. Ask a doctor before use if you have kidney disease. Your doctor should determine if you need a different dose. If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact a poison control center right away.