Discontinue use if hypophosphataemia develops. Patients predisposed to GI obstruction, ileus, subileus & perforation including those w/ altered GI anatomy eg, diverticular disease, peritonitis, history of GI surgery, cancer & ulceration; hypomotility disorders eg, constipation, diabetic gastroparesis. Regularly monitor Ca serum levels & liver function tests. Long-term use. Glucose-galactose malabsorption. May affect ability to drive & use machines. Hepatic impairment. Not recommended during pregnancy. Lactation. Not recommended in childn & adolescents.