 <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] . If either is present, do not use the liquid. Learn how to store and discard medical supplies safely. It is very important to follow the diet recommended by your doctor to get the most benefit from this medication and to prevent serious side effects. Do not take more than 2 grams of calcium a day while you are taking this medication. Sources of calcium include your diet, phosphate binders, or calcium supplements. If you have any questions about how much calcium you take in a day, ask your doctor or pharmacist. Do not take other supplements/vitamins (such as vitamin D) unless otherwise directed by your doctor. (See also Drug Interactions section.The side effects of Hectorol Intravenous: Headache, upset stomach, constipation, nausea, vomiting, and tiredness may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: bone/joint/muscle pain, loss of appetite, increased thirst, increased urination, </s>