 <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]  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 your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include: digoxin, certain phosphate binders (such as calcium acetate), phosphate supplements (such as potassium phosphate), sodium polystyrene sulfonate. Calcium carbonate can decrease the absorption of other drugs. Some examples of affected drugs include tetracycline antibiotics (such as doxycycline, minocycline), bisphosphonates (such as alendronate), estramustine, iron, levothyroxine, pazopanib, strontium, quinolone antibiotics (such as ciprofloxacin, levofloxacin), among others. Separate your doses of these medications as far as possible from your doses of calcium carbonate. Ask your doctor or pharmacist about how long you should wait between doses and for help finding a dosing schedule that will work with </s>