calcium phosphate, tribasic (tricalcium phosphate)

What is the most important information I should know about calcium phosphate?

Follow all directions on the label and package. Use exactly as directed.

What is calcium phosphate?

Calcium phosphate (tricalcium phosphate) is a mineral that is used as a supplement in people who do not get enough calcium from food.

Calcium phosphate is used to treat calcium deficiencies that may be associated with low blood calcium, a parathyroid disorder, or osteoporosis and other bone conditions.

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

What should I discuss with my healthcare provider before taking calcium phosphate?

Ask a doctor or pharmacist if this medicine is safe to use if you have ever had:

• high blood levels of calcium;
• kidney disease, kidney stones;
• a lung disorder called sarcoidosis;
• a pancreas disorder;
• decreased stomach acid; or
• any condition that makes it hard for your body to absorb nutrients from food (malabsorption).

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

Do not give this medicine to a child without medical advice.

How should I take calcium phosphate?

Use exactly as directed on the label, or as prescribed by your doctor.

If you take more than 1 tablet, space your doses evenly at different times of the day.

You may need medical tests.

You may need to follow a special diet or take vitamin D supplements. Follow all instructions of your doctor or dietitian. Learn about the foods you should eat or avoid.

What happens if I miss a dose?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

Overdose may cause nausea, vomiting, loss of appetite, weakness, or tiredness, headache, or mood changes.

What should I avoid while taking calcium phosphate?

Ask your doctor before using an antacid, and use only the type your doctor recommends.

What are the possible side effects of calcium phosphate?

• severe nausea, vomiting, or constipation; or
• high blood calcium --confusion, tiredness, loss of appetite, increased thirst or urination, weight loss; or
• symptoms of a kidney stone --severe pain in your side or lower back, blood in your urine, painful urination.

Less serious side effects may include:

• nausea, stomach bloating;
• constipation; or
• gas.

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.

What other drugs will affect calcium phosphate?

Ask a doctor or pharmacist before using calcium phosphate with any other medications, especially

• an antacid;
• an antibiotic; or
• another form of calcium.

This list is not complete. Other drugs may affect calcium phosphate, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

Where can I get more information?

Your doctor or pharmacist can provide more information about calcium phosphate.