 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  Calcium Carbonate Oral: Before taking calcium carbonate, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients (such as milk or dairy products found in some brands), which can cause allergic reactions or other problems. Talk to your pharmacist for more details. If you have any of the following health problems, consult your doctor or pharmacist before using this medication: high calcium levels (hypercalcemia), stomach/intestinal blockage, kidney disease (such as kidney stones). Some products may contain aspartame. If you have phenylketonuria (PKU) or any other condition that requires you to restrict your intake of aspartame (or phenylalanine), consult your doctor or pharmacist about using this drug safely. Tell your doctor if you are pregnant before using this medication. This medication passes into breast milk. Consult your doctor before breast-feeding.The interactions of Calcium Carbonate Oral: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with </s>