Calcium Carbonate 625 mg Tablet

Calcium supplement and antacid:

• Calcium deficiency and prevention/treatment of osteoporosis (often with vitamin D)
• Extra calcium needs in pregnancy, breastfeeding, growth and old age
• Heartburn and acid indigestion (antacid)
• Lowering high phosphate in kidney failure (phosphate binder, specialist use)

Supplement: usually 500 mg–1.25 g (500 mg elemental calcium) once or twice daily with meals.

Antacid: 500 mg–1 g chewed when symptoms occur; maximum as stated on the pack (usually about 7 g/day).

Phosphate binder: taken with meals as prescribed.

• Take with food for best absorption; chew chewable tablets well.
• Separate from iron, thyroid tablets, tetracyclines and quinolones by 2–4 hours.

• High blood or urine calcium
• Calcium kidney stones, severe kidney failure (unless as a phosphate binder under supervision)
• Allergy to the product

Common: constipation, wind, bloating, belching.

Less common: nausea, stomach discomfort.

With high doses/long use: high blood calcium, milk-alkali syndrome (high calcium, alkalosis, kidney problems), kidney stones; rebound acid when used as an antacid.

• Kidney disease or stones: use only under supervision.
• Do not use as an antacid regularly for more than 2 weeks without advice.
• Count total calcium from all supplements.

Safe at recommended doses in pregnancy and breastfeeding.

• Tetracyclines, quinolones, levothyroxine, iron, zinc, bisphosphonates (absorption reduced)
• Thiazide diuretics (high calcium)
• Digoxin (toxicity with high calcium)
• PPIs (reduce calcium carbonate absorption — calcium citrate may be better)

High calcium: nausea, vomiting, thirst, constipation, confusion, heart-rhythm problems. Seek medical care.

Store below 30°C, dry.