Ask a doctor before use if you have, kidney disease, a magnesium restricted diet, stomach pain, nausea or vomiting, noticed a sudden change in bowel habits that lasts more than 2 weeks. When using this product, do not use more than directed. Ask a doctor or pharmacist before use if you are presently taking a prescription drug. Keep this and all drugs out of the reach of children. In case of accidental overdose, seek professional assistance or contact a poison control center (1-800-222-1222) immediately. Stop use and ask a doctor if, you have rectal bleeding or failure to have a bowel movement after use. This may indicate a serious condition. You need to use a laxative for more than 1 week. If pregnant or breast-feeding, ask a health professional before use.