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Thorens 10,000 units/ml (Colecalciferol)

Patient Information Leaflet

What is Thorens?

  • It is Vitamin D supplementation.
  • Thorens oral drops are a solution that contains colecalciferol (vitamin D3).
  • Vitamin D3 can be found in some foods and is also produced by the body when skin is exposed to sunlight.

Why am I having Thorens?

  • Thorens oral drops solution is used to prevent and treat vitamin D3 deficiency in adults, adolescents and children with a risk, or a diagnosis of vitamin D deficiency.
  • You may have been prescribed the oral solution because it is the most suitable form of this medicine for you.

What dose will I have?

Treatment for children

  • The dose depends on the age of the child. We will use their blood test results to work out the dose they need.

Treatment for adults

  • Depending on your blood vitamin D levels you may be prescribed a loading dose and then a maintenance dose or a standard maintenance dose.

Treatment for bariatric patients

  • You will be prescribed 2,000 units (0.2 mL) daily. After 2 weeks this can be changed to normal tablets by your GP.

How do I use Thorens?

  • This medication should preferably be taken with a large meal to help with the absorption of vitamin D3.
  • Alternatively, you can mix the prescribed dose (in mL) with cold or lukewarm food to make it easier to take.

Step by step guide for the use of your medication:

Thorens visual instructions

More information about Thorens

Contact our Service

  • Medicines Information: 020 7288 5021 Monday to Friday from 9am to 5:30pm for any other enquiries.
Published:
10 Sep 2026
Review:
10 Sep 2028
Reference:
ACW/Pharm/Thorens/01
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