What is Calcium Citrate: Uses, Warnings & Interactions

Your doctor will tell you how much medicine to use. Do not use more than directed.

Follow the instructions on the medicine label if you are using this medicine without a prescription. Ask your pharmacist or health caregiver if you are not sure how much calcium you should take in one day.

Most calcium supplements should be taken with food. Drink a full glass of water (8 ounces) with each dose, unless you are on kidney dialysis. If you are using this medicine as a phosphate binder for kidney dialysis, do not drink extra water with each dose.

Oral routeCarefully follow your doctor's instructions about any special diet.

If you need to take more than one dose each a day, take each dose at evenly spaced times, unless your doctor has told you otherwise.

Do not crush, break, or chew the tablet or capsule unless the label says it is chewable. Swallow the regular tablet or capsule whole.

If you are using the chewable tablet or wafer, chew it completely before you swallow.

Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup. You might need to shake the medicine just before using it.

Follow the instructions on the medicine label if you are using this medicine without a prescription. Ask your pharmacist or health caregiver if you are not sure how much calcium you should take in one day.

If you need to take more than one dose each a day, take each dose at evenly spaced times, unless your doctor has told you otherwise.

Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup. You might need to shake the medicine just before using it.

Oral routeCarefully follow your doctor's instructions about any special diet.

If you are using the chewable tablet or wafer, chew it completely before you swallow.

Most calcium supplements should be taken with food. Drink a full glass of water (8 ounces) with each dose, unless you are on kidney dialysis. If you are using this medicine as a phosphate binder for kidney dialysis, do not drink extra water with each dose.

Do not crush, break, or chew the tablet or capsule unless the label says it is chewable. Swallow the regular tablet or capsule whole.

Your doctor will tell you how much medicine to use. Do not use more than directed.

Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.

Keep all medicine out of the reach of children. Never share your medicine with anyone.

You should not use this medicine if you have had an allergic reaction to calcium.

If you are using a large amount of calcium or using it for a long time, your doctor might need to check your blood on a regular basis. Be sure to keep all appointments.

Some health problems can affect how much calcium you should take. Tell your doctor if you have stomach or digestion problems, such as on-going diarrhea, not absorbing nutrients properly, or not having enough acid in your stomach.

You should not use certain brands of this medicine if you have kidney disease or are on dialysis, because they may harm your kidneys. Ask your caregiver what brands are best for you.

Make sure your doctor knows if you are pregnant or breast feeding, or if you are allergic to shellfish. Tell your doctor if you have kidney disease or have ever had kidney stones. Make sure your doctor knows if you have had problems with too much calcium (hypercalcemia) or too little calcium in your blood (hypocalcemia). Some health problems that can cause hypercalcemia are sarcoidosis or problems with your parathyroid gland.

Make sure your doctor knows if you are also using other supplements or medicines that contain calcium. Tell your doctor if you are also using gallium nitrate (Ganite®), cellulose sodium phosphate (Calcibind®), or etidronate (Didronel®).

Calcium can change the way other medicines work if you take them at the same time. If you need to use other medicines, take them at least 2 hours before or 2 hours after you take your calcium supplement. This is particularly important if you are also using phenytoin (Dilantin®) or a tetracycline antibiotic to treat an infection (such as doxycycline, minocycline, Vibramycin®).

Do not take your calcium supplement with a high-fiber meal (such as bran, whole-grain cereal or bread, fresh fruits). Do not smoke cigarettes or cigars. Do not drink large amounts of alcohol or caffeine (for example, more than about 8 cups of coffee).

If you are using a large amount of calcium or using it for a long time, your doctor might need to check your blood on a regular basis. Be sure to keep all appointments.