 <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]  people taking certain medications such as phenytoin, phenobarbital, or prednisone).Calcium plays a very important role in the body. It is necessary for normal functioning of nerves, cells, muscle, and bone. If there is not enough calcium in the blood, then the body will take calcium from bones, thereby weakening bones. Having the right amount of calcium is important for building and keeping strong bones. How to use Calci-Mix Take this medication by mouth with food. If your product contains calcium citrate, then it may be taken with or without food. Follow all directions on the product package, or take as directed by your doctor. For best absorption, if your daily dose is more than 600 milligrams, then divide your dose and space it throughout the day. If you have any questions, ask your doctor or pharmacist. If you are using the chewable product, chew it well before swallowing. If you are using the effervescent tablet, allow the tablet to fully dissolve in a glass of water before drinking it. Do not chew or swallow the tablet whole. If you are using the liquid product or powder, measure the medication with a dose-measuring spoon or device to make sure you get the correct dose. Do </s>