What is Dekristol?
Dekristol® contains the active ingredient Colecalciferol (vitamin D3) in highly dosed form and is used to treat a proven vitamin D deficiency. It is available as a soft capsule in dosage 20,000 I.E. (international units).
Vitamin D3 is essential for calcium absorption, bone health and immune system. According to Robert Koch-Institut, about 60% of the population in Germany have suboptimal vitamin D levels, especially in the winter months.
Dekristol® 20,000 I.E. is subject to prescription and is used for initial saturation of a serious deficiency. Lower dosages (up to 1,000 I.E.) are available without prescription.
Active Ingredients & Mechanism of Action
Active ingredient: Colecalciferol (Vitamin D3)
Active mechanism:
- Colecalciferol (vitamin D3) is converted into 25-OH vitamin D (calcidiol) in the liver
- In the kidney, it is further activated to 1.25-(OH)2 vitamin D (calcitriol)
- Calcitriol is the biologically active hormone
Activities of vitamin D:
- Increases calcium intake in the intestine
- Promotes the mineralization of bones
- Regulates calcium and phosphate metabolism
- Supports immune function (T cells, macrophages)
- influences muscle function
- Modulating cell growth
**Vitamin D deficiency (25-OH vitamin D < 20 ng/ml) may lead to:* *
- Osteomalazie (bone softening)
- Osteoporosis (Knochenschwund)
- Muscle weakness and increased risk of falling
- Increased infectiousness
Who is it suitable for?
Dekristol® is suitable for:
- Adults with proven vitamin D deficiency (25-OH vitamin D < 20 ng/ml)
- Saturation therapy for severe deficiency (< 12 ng/ml)
- Osteoporosis-Prophylaxe and Therapy (in addition)
- Older people with increased risk of deficiency
Not suitable:
- Hypercalcemia (increased calcium level)
- Hyperkalziurie (increased calcium excretion in urine)
- Kidney stones (calcium stones)
- Sarkoidosis and other granulomatous diseases
- Heavy renal insufficiency (conversion disturbed)
Available Dosages
Saturation therapy for severe deficiency:
- 20,000 I.E. once a week for 8–12 weeks
- Or 20,000 I.E. every 2 weeks for 12–16 weeks
Conservation therapy:
- 20,000 I.E. once a month (after saturation)
- Or change to daily gift (800–2,000 I.E. without prescription)
Target value:
- 25-OH vitamin D: 30–60 ng/ml (75–150 nmol/L)
Control:
- Control blood levels 6-8 weeks after the start of therapy
- Specify calcium levels for high dose therapy
How to Take
Intake:
- Soft capsule in whole swallow with water
- Best for a fat-containing meal (improves the intake)
- With weekly gift: always on the same weekday
Important notes:
- Do not take without proven deficiency (blood test!)
- Overdose for months can cause hypercalcemia
- Observe calcium intake (together with vitamin D important)
- Not at the same time with other highly dosed vitamin D preparations
Contraindications
**Dekristol® must not be accepted at:* *
- Hyperkalzemia
- Hyperkalziurie
- Nephrolithiasis (Calzium Stones)
- Vitamin D overdose
- hypersensitivity to Colecalciferol
Preview at:
- Sarkoidosis, tuberculosis (increased calcium levels possible)
- Kidney failure (destroyed activation)
- Simultaneous intake of Thiazid diuretics (increased calcium)
- Heart glycoside therapy (Digitalis → arrhythmia risk in hypercalcemia)
- Immobilisation (increased hypercalcemia risk)
Possible Side Effects
For correct dosage rare:
- Gastrointestinal complaints (abuse, constipation)
- Headaches
- Allergic reactions (very rare)
For overdose (hypercalcemia):
- nausea, vomiting, loss of appetite
- thirst, increased urination
- Blocking
- fatigue, weakness
- muscle pain
- In extreme cases: kidney scaling, kidney stones, heart rhythm disorders
** An overdose is very unlikely in the case of use under medical control. The recommended intake is safe.
Frequently Asked Questions
Similar Medications
Is Dekristol right for you?
A licensed doctor will review your information and issue a prescription if suitable. Discreet and secure.
Important Notice
This information does not replace medical advice. If you have questions about your health or the suitability of this medication, please consult a doctor or pharmacist.
Important Safety Information
This service operates under German pharmaceutical law (HWG). For risks and side effects, read the package leaflet and consult your doctor or pharmacist. All medications are dispensed from a licensed pharmacy in Germany.



