Do not take this medicine with any of the following medications:
-ammonium chloride
-methenamine

This medicine may also interact with the following medications:
-antibiotics like ciprofloxacin, tetracycline
-captopril
-delavirdine
-gabapentin
-iron supplements
-medicines for fungal infections like ketoconazole and itraconazole
-medicines for seizures like ethotoin and phenytoin
-mycophenolate
-quinidine
-rosuvastatin
-sucralfate
-thyroid medicine

They need to know if you have any of these conditions:
-constipation
-dehydration
-high blood calcium levels
-kidney disease
-stomach bleeding, obstruction, or ulcer
-an unusual or allergic reaction to calcium carbonate, other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse. Do not treat yourself for stomach problems with this medicine for more than 2 weeks. See a doctor if you have black tarry stools, rectal bleeding, or if you feel unusually tired. Do not change to another antacid product without advice.

If you are taking other medicines, leave an interval of at least 2 hours before or after taking this medicine.

To help reduce constipation, drink several glasses of water a day.

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medicine after the expiration date.