Vitamin D3 (Cholecalciferol): uses, dose & side effects
Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Vitamin D3 keeps bones healthy by helping the body absorb calcium. Deficiency is very common in India and can cause tiredness, bone and muscle aches. It is corrected with supplements and sunlight.
Typical dose — general reference only, NOT a prescription
Measure
Range
Category
Over-the-counter (OTC)
Adult dose
Maintenance 400–2000 IU/day; deficiency often 60,000 IU weekly for 6–8 weeks (as advised)
Child (paediatric) dose
Infants 400 IU/day; deficiency doses are age/weight-based by a doctor
What it is used for
Treating and preventing vitamin D deficiency
Bone health (with calcium)
Supporting muscle function
Common brand names
India: Uprise-D3, Calcirol, D-Rise, Tayo 60K
Worldwide: (cholecalciferol; many brands, e.g. D3)
Common side effects
Usually none at normal doses
Very high doses can raise blood calcium (nausea, thirst, kidney issues)
Before taking it — precautions
Do not take very high doses without testing/advice
Take fatty-food-containing meals for better absorption
Combine with calcium as advised
When to see a doctor urgently
Symptoms of high calcium from overdose: nausea, excessive thirst, confusion
Kidney stones with prolonged excess
Doses are a general reference, not a prescription. Doses shown are typical adult/paediatric references and vary with age, weight, kidney/liver function and the exact product. Paediatric doses are usually weight-based and must be set by a doctor. MedDroid cannot prescribe — always confirm vitamin d3 and your dose with a doctor or pharmacist and the leaflet inside the pack.
Frequently asked questions
How much vitamin D should I take?
Maintenance is often 400–2000 IU/day, but deficiency is treated with higher weekly doses for a few weeks. Ideally, dose is guided by a blood test.
Can I get enough vitamin D from sunlight?
Sensible sun exposure helps, but many people in cities, with darker skin or limited sun still fall short and need supplements.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.