About ergocalciferol
Vitamin D2 supplement
Used for
- Treats vitamin D deficiency
- Prevents or treats deficiency-related bone disorders
Usual adult dose
For deficiency, commonly 50,000 IU once weekly for 6–8 weeks, then maintenance dosing as directed.
Usual dose in children
For deficiency, dosing depends on age and severity; specialist guidance is commonly used.
Common side effects
- High calcium levels
- Nausea or vomiting
- Constipation
- Weakness or increased thirst
Important warnings
- Excessive or prolonged use can cause vitamin D toxicity and kidney problems.
- Use caution with kidney disease, high calcium, or a history of kidney stones.
- Blood calcium and vitamin D levels may need monitoring during treatment.
Pregnancy
Use only when needed; prescribed doses may be used, but excessive vitamin D can harm mother and fetus.
Breastfeeding
Generally compatible at prescribed doses; excessive dosing can cause high calcium in the infant.
Interactions
- Thiazide diuretics may increase risk of high calcium.
- Digoxin may increase risk of abnormal heart rhythms if calcium rises.
- Orlistat and bile-acid binders can reduce vitamin D absorption.
- Some seizure medicines and rifampin can reduce 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 It may be incomplete or out of date.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.