Gas, bloating, and constipation are common Divvy your dose up into servings and to take them with food. Drinking more fluids may help you avoid these things, too.
Calcium can make certain drugs less effective, so talk to your doctor if you're taking a prescription medicine for osteoporosis or Paget's disease, seizures, or thyroid problems, or an antibiotic.
Some antacids, laxatives, and steroids can pull calcium out of your body or keep you from using it well.