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Posture

Generic Name: calcium phosphate, tribasic (tricalcium phosphate) (KAL see um FOSS fate, tri BAY sick)
Brand Name: Posture

Medically reviewed on December 15, 2017.

What is calcium phosphate?

Calcium is a mineral that is found naturally in foods. Calcium is necessary for many normal functions of the body, especially bone formation and maintenance. Calcium can also bind to other minerals (such as phosphate) and aid in their removal from the body.

Calcium phosphate is used to prevent and to treat calcium deficiencies.

Calcium phosphate may also be used for purposes not listed in this medication guide.

Important Information

Do not take calcium phosphate or antacids that contain calcium without first asking your doctor if you also take other medicines. Calcium can make it harder for your body to absorb certain medicines.

Calcium phosphate works best if you take it with food.

Before taking this medicine

To make sure you can safely take calcium phosphate, tell your doctor if you have any of these other conditions:

Talk to your doctor before taking calcium phosphate if you are pregnant.

Talk to your doctor before taking calcium phosphate if you are breast-feeding a baby.

How should I take calcium phosphate?

Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Calcium phosphate works best if you take it with food.

Take calcium phosphate with a full glass of water.

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include nausea, vomiting, decreased appetite, constipation, confusion, delirium, stupor, and coma.

What should I avoid while taking calcium phosphate?

Follow your healthcare provider's instructions about any restrictions on food, beverages, or activity.

Calcium phosphate side effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Less serious side effects may include:

  • nausea or vomiting;

  • decreased appetite;

  • constipation;

  • dry mouth or increased thirst; or

  • increased urination.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also: Side effects (in more detail)

What other drugs will affect calcium phosphate?

Calcium phosphate can make it harder for your body to absorb other medications you take by mouth. Tell your doctor if you are taking:

This list is not complete and other drugs may interact with calcium phosphate. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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