Hidroferol in Spain: The Vitamin D Capsule
Medically Reviewed by Dr. Pedro Yelamo Vera, MD
Licensed Physician No. 484814280 · Official Medical College of Bizkaia (Spain)Last reviewed: 2 October 2026
Hidroferol is calcifediol, a prescription form of vitamin D used in Spain. What it is for and the dosing mistake that can raise calcium dangerously.
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Hidroferol is calcifediol, a form of vitamin D that the body uses quickly. It is not the same product as the daily vitamin D supplements common in the UK and the US.
- What it is used for: treating vitamin D deficiency confirmed by a blood test, and related bone problems.
- The most dangerous mistake: taking it more often than prescribed can cause too much calcium in the blood. Symptoms are nausea, vomiting, great thirst, passing a lot of urine, constipation, weakness and confusion.
- How to take it safely: follow exactly the frequency written on your prescription, which differs from person to person. If the instructions are in Spanish and you are unsure, ask the pharmacist or doctor to confirm them.
- Check first if: you have had kidney stones, have kidney disease or take thiazide diuretics.
- Do you need a prescription? Yes.
This is general information and does not replace the package leaflet or the advice of your doctor or pharmacist. If you need an assessment, you can book a video consultation. This service is for urgent, non-emergency care; in an emergency, call 112.
Medical Citations & Sources
This content is written and reviewed by a licensed physician with reference to the following official health authorities.
