Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate)) – Side Effects, Interactions, Uses, Dosage, Warnings

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 is Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate)) used for?

  • Hypocalcemia
  • Osteomalacia
  • Osteoporosis
  • Pseudohypoparathyroidism
  • Hypoparathyroidism
  • not applicable
  • Hungry Bone Syndrome
  • Tumor Lysis Syndrome


What is the most important information I should know about Posture (Calcium Phosphate, Tribasic (Tricalcium 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.

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Side Effects

What are the side effects of Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate))?

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

Stop using calcium phosphate and call your doctor at once if you have:

  • 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.

Pregnancy & Breastfeeding

Can I take Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate)) if I’m pregnant or breastfeeding?

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


What drugs and food should I avoid while taking Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate))?

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

Dosage Guidelines & Tips

How to take Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate))?

Use Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate)) 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.

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

Take with food.

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.

Store at room temperature away from moisture and heat.

What should I do if I missed a dose of Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate))?

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.

Overdose Signs

What happens if I overdose on Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate))?

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

If you think you or someone else may have overdosed on: Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate)),  call your doctor or the Poison Control center

(800) 222-1222

If someone collapses or isn't breathing after taking Posture (Calcium Phosphate, Tribasic (Tricalcium Phosphate)), call 911


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