Calcium carbonate - oral

Patient Medicine Information
Why do I need this medicine?
Calcium carbonate is a dietary supplement that is used for calcium deficiency.

It may also be used in certain conditions to help neutralise stomach acid.
How do I take this medicine?
Take Calcium carbonate exactly as directed by your doctor or according to the instructions on the label. Do not take more than instructed by your doctor.

This medicine is available as a chewable tablet or as an oral suspension.

If you are taking a chewable tablet, the tablet should be chewed and not swallowed whole.

If you are taking an oral suspension, shake the bottle well before you take it to ensure that the liquid is evenly mixed. Use the measuring spoon or cup provided to measure your dose.

The dose of this medicine will be decided by your doctor. Your doctor will advise you on the dosage depending on your condition.
What should I do if I have forgotten to take this medicine?
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and return to your normal dosing schedule.

DO NOT double a dose under any circumstances.

If you often forget to take your medicine, let your doctor and pharmacist know.
When should I not use this medicine?
Alert your doctor if you have the following conditions:
  • high calcium levels in the blood which may be caused by certain bone tumours, overactive parathyroid gland or excessive vitamin D in the body
  • very high calcium levels in your urine
  • kidney stones
  • brittle bone disease or osteoporosis due to long term immobility
  • severe kidney disease
as Calcium carbonate may not be suitable for you.
What should I take note of while taking this medicine?
Inform your doctor if you have the following conditions:
  • history of kidney stones
  • mild to moderate kidney disease
  • achlorhydria (absence or low production of acid in the stomach)
  • hypoparathyroid disease (low level of parathyroid hormones)
Let your doctor know if you are pregnant or breastfeeding.

If you are on long-term treatment with this medicine, your doctor may need to perform blood tests to check the level of calcium in your blood and take a urine sample to monitor your kidney function. Your doctor will advise you about how often you need to have these tests.
What side effects could I experience?
Calcium carbonate may cause any of the following side effects: nausea, vomiting, headache, constipation, stomach wind and dry mouth.

Inform your doctor if any of these side effects do not go away or are severe, or if you experience other side effects.
Can I take this with other medicines?
Inform your doctor and pharmacist if you are taking any of these medicines:
  • antibiotics e.g. tetracycline, quinolones
  • water pills e.g. hydrochlorothiazide
  • medicines used to treat heart failure and irregular heartbeat e.g. digoxin
This list does not include all medicines that may interact with Calcium carbonate.

Always notify your doctor and pharmacist if you are taking any other medicines, including herbal tonics such as traditional Chinese medicines, supplements and medicines that you buy without a prescription.
What special dietary instructions should I follow?
Avoid alcohol.

Avoid intake of fibre rich foods such as bran, foods high in oxalates such as spinach, beets, french fries and nuts or whole grain cereals. These foods may decrease calcium absorption.
How should I store this medicine?
Store in a cool, dry place away from the reach of children.

Medicines must not be used past the expiry date.
This information is independently developed by MIMS based on calcium carbonate - oral and is provided for your reference only. It is not a replacement for and should only be used in conjunction with full consultation with a licensed healthcare professional, the information provided by your pharmacist and/or the manufacturer of the medication. It may not contain all the available information you require and cannot substitute professional medical care, nor does it take into account all individual circumstances. Although great effort has been made to ensure content accuracy, we shall not be held responsible or liable for any claims or damages arising from the use or misuse of the information contained herein, its contents or omissions, or otherwise. Copyright © 2022 MIMS. All rights reserved. Powered by
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