About calcium
Calcium supplement
Used for
- Preventing or treating calcium deficiency
- Supporting healthy bones and teeth
- Supplementing calcium during osteoporosis treatment
Usual adult dose
Usually 500–1,000 mg elemental calcium daily, depending on dietary intake; divide doses above 500 mg. Follow the formulation’s label.
Usual dose in children
Age-specific dosing depends on dietary calcium intake and formulation; follow the product’s pediatric labeling.
Common side effects
- Constipation
- Bloating or gas
- Nausea
- Excessive intake may cause high blood calcium
Important warnings
- Avoid with high blood calcium.
- Kidney disease or kidney stones require medical supervision.
- Effervescent tablets may contain sodium.
- Additional vitamins and ingredients vary by country.
Pregnancy
Calcium is generally safe at recommended doses during pregnancy; excessive supplementation should be avoided.
Breastfeeding
Calcium is compatible with breastfeeding at recommended doses.
Interactions
- Reduces levothyroxine absorption; separate by at least four hours.
- Reduces absorption of some antibiotics and osteoporosis medicines.
- Thiazide diuretics may increase blood calcium.
- High calcium increases digoxin-related heart rhythm risks.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.