About ergocalciferol
Vitamin D2 (fat-soluble vitamin)
Used for
- Prevention and treatment of vitamin D deficiency
- Support for bone health and calcium absorption
Usual adult dose
For deficiency, commonly 1,000–2,000 IU daily; treatment doses depend on blood levels.
Usual dose in children
For deficiency, commonly 1,000–2,000 IU daily; dose varies by age and blood levels.
Common side effects
- High calcium levels, causing nausea, constipation, thirst, or frequent urination
- At excessive doses, weakness, confusion, or kidney stones
Important warnings
- Excessive or prolonged dosing can cause vitamin D toxicity and high calcium.
- Use caution with kidney disease, high calcium, or a history of kidney stones.
- Dose measurement errors are possible with concentrated drops.
Pregnancy
Vitamin D is important in pregnancy; recommended intake is generally 600 IU daily. Higher doses require clinical supervision.
Breastfeeding
Vitamin D is compatible with breastfeeding; usual maternal intake is generally 600 IU daily. Infant supplementation may still be needed.
Interactions
- Thiazide diuretics may increase risk of high calcium.
- Digoxin: high calcium can increase abnormal heart rhythm risk.
- Orlistat and bile-acid binders can reduce vitamin D absorption.
- Some seizure medicines and rifampin can lower vitamin D levels.
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 It may be incomplete or out of date.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.