Adrigyl

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Adrigyl

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Adrigyl

What is Adrigyl?

Adrigyl is an oral solution containing cholecalciferol, more commonly known as vitamin D3. It is a pharmacological preparation of the same form of vitamin D that the human body naturally synthesizes when the skin is exposed to ultraviolet B (UVB) sunlight.

Composition and Mechanism

The active ingredient, cholecalciferol, is a fat-soluble vitamin that plays a fundamental role in the body's internal balance of minerals. Once ingested, it undergoes metabolic conversion in the liver and kidneys to become its active form, calcitriol. In this state, it acts as a hormone to facilitate the absorption of calcium and phosphorus from the gastrointestinal tract.

Therapeutic Purpose

Adrigyl is primarily used to address physiological requirements for vitamin D when dietary intake or sunlight exposure is insufficient. Its main functions include:

  • Bone Health Support: By maintaining adequate calcium levels, it aids in the mineralization of bone tissue and the maintenance of skeletal density.
  • Neuromuscular Function: It contributes to normal muscle function, as calcium is essential for muscle contraction and signaling.
  • Systemic Support: Beyond the skeletal system, vitamin D receptors are present in various tissues throughout the body, where the vitamin supports several cellular processes.

Clinical Context

This solution is utilized in various clinical scenarios, ranging from the prevention of vitamin D deficiency in infants, children, and pregnant women to the management of established deficiency in adults. It is also used as an adjunct to specific treatments for bone-related conditions where maintaining optimal vitamin D levels is necessary for the efficacy of other therapies.

Regulatory References

  1. Base de Données Publique des Médicaments (France)

What side effects are possible with Adrigyl?

Possible Side Effects and Safety Information

The official safety profile for Colecalciferol (Adrigyl) is primarily defined by the risks associated with elevated levels of the active form, known as Hypervitaminosis D, which leads to high calcium levels in the body (hypercalcaemia).


Frequency-Classified Adverse Reactions

Adverse reactions are classified by their expected incidence based on regulatory data:

Classification Adverse Reaction System-Organ Class Involved
Uncommon Hypercalcaemia, Hypercalciuria Metabolism and Nutrition
Rare Pruritus (itching), Rash, Urticaria Skin and Subcutaneous Tissue
Not Known Hypersensitivity reactions Immune System Disorders

Hypercalcaemia (excessive blood calcium) and Hypercalciuria (excessive urine calcium) are the most frequently documented adverse events.


Serious Safety Considerations

The main severe risk noted in official documents is the consequence of sustained overdose. Chronic, excessive exposure can potentially result in irreversible renal damage (kidney damage), generalized soft tissue calcification, and the possibility of cardiac arrhythmias. Symptoms of severe overdose may include anorexia, mental disturbances, and excessive thirst.


Population-Specific Restrictions

Official labels strictly contraindicate the use of Colecalciferol in individuals with pre-existing conditions such as Hypercalcaemia, Nephrolithiasis (kidney stones), Nephrocalcinosis, and Severe renal insufficiency. Patients with sarcoidosis require specific caution and monitoring of calcium levels due to altered metabolism. Long-term use requires the monitoring of serum and urinary calcium levels to mitigate risk.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose of Colecalciferol (Adrigyl) is officially classified as Hypervitaminosis D, a condition pathologically defined by sustained Hypercalcemia (abnormally high blood calcium levels). The clinical manifestations documented in regulatory labeling include gastrointestinal symptoms such as nausea, persistent vomiting, and anorexia, alongside constitutional effects like fatigue, muscle weakness, increased thirst (polydipsia), and frequent urination (polyuria). Neurological signs such as confusion and apathy are also listed in regulatory documentation.

Severe Outcomes Documented in Labeling Emergency Action Mandated
Renal failure, cardiac arrhythmias, and the risk of irreversible soft-tissue calcification. Seek immediate medical attention or call the Poison Help line for suspected overdose.

Official regulatory guidance requires the immediate discontinuation of the medicine upon suspicion of overdose. Management is symptomatic and supportive, as no specific antidote is known. The protocol involves using intravenous fluids and other measures to reduce calcium levels, necessitating frequent monitoring of serum calcium levels. Regulatory notes indicate that infants may exhibit toxicity at lower chronic doses, and those with granulomatous diseases may have increased risk.

Therapeutic Uses of Adrigyl

The primary purpose of Adrigyl (Colecalciferol/Vitamin D3) is generally used to help address Vitamin D deficiency, contributing to the management of mineral regulation and systemic balance. This medicine is commonly used to help with the symptomatic management of bone diseases.

This medication is relevant for a variety of clinical situations, including the therapeutic management of bone conditions like rickets in children and osteomalacia in adults, and for supportive use in conditions such as osteoporosis.


Quick Fact: Relief for Musculoskeletal Discomfort

Domain Conditions & Symptoms Therapeutic Benefit
Skeletal Health Deficiency, Osteomalacia, Rickets Supports bone mineralization and integrity
Physical Comfort Muscle weakness, diffuse bone pain Assists with easing physical discomfort and fatigue
Safety Context Osteoporosis, high-risk of falls Helps manage the propensity for falls and fractures

This supportive therapy helps address symptoms related to systemic imbalance, specifically targeting diffuse musculoskeletal pain and proximal muscle weakness in the legs and upper body. The support it offers helps contribute to maintaining functional stability and mobility, which assists with easing the overall physical discomfort. This use may be part of symptomatic management for high-risk groups, especially older adults.

“Applied across domains where additional symptomatic support is needed, this medicine is relevant for managing symptoms that interfere with daily comfort.”

Regulatory References

  1. NIH MedlinePlus overview on Cholecalciferol

Eligibility and Restrictions for Use

Who Can and Cannot Use Adrigyl? (Colecalciferol)

The eligibility for Adrigyl is strictly defined by official regulatory documentation concerning pre-existing conditions and population status.

Populations For Whom Use Is Contraindicated:

Absolute contraindications prohibit the use of Adrigyl in patients with Hypersensitivity to Colecalciferol or its excipients, existing Hypercalcaemia (high blood calcium), Hypercalciuria (high urine calcium), or Hypervitaminosis D. Use is also prohibited in patients with Severe Renal Impairment, Nephrocalcinosis, or Calcium Nephrolithiasis (kidney stones).

Age and Condition-Based Restrictions:

Population Group Regulatory Status
Infants, Children, Adults Use is established for deficiency prevention and treatment.
Children under 12 High-strength capsule/tablet forms are generally not recommended.
Pregnancy Permitted under supervision, but high treatment doses are not recommended.
Mild to Moderate Renal Impairment Use requires caution and close monitoring of calcium and phosphate levels.
Sarcoidosis Use requires caution and close monitoring due to increased conversion risk.

Use is acceptable and requires no dose adjustment for patients with Hepatic Impairment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This profile outlines the officially documented interaction patterns for Colecalciferol (Vitamin D3), based strictly on government regulatory documents.

Category Documented Interacting Substances Official Interaction Effect
Pharmacokinetic Interactions (Reduced Exposure) Anticonvulsants (e.g., Phenytoin, Phenobarbital), Rifampicin, Glucocorticoids These agents are documented to increase the metabolism and elimination of Colecalciferol (hepatic enzyme induction), thereby reducing its concentration and effectiveness.
Absorption-Impairing Agents Ion Exchange Resins (e.g., Cholestyramine), Mineral Oils, Orlistat These substances can impair the gastrointestinal absorption of the fat-soluble Colecalciferol.
Pharmacodynamic Interactions (Additive Effects) Thiazide Diuretics (e.g., Hydrochlorothiazide) Reduce the excretion of calcium, creating an additive risk of hypercalcaemia (high calcium levels).
Toxicity Risk Cardiac Glycosides (e.g., Digoxin) Hypercalcaemia resulting from Colecalciferol can increase the risk of digitalis toxicity and serious arrhythmias.
Other Supplements Other Vitamin D Analogues (e.g., Calcitriol) Increased risk of adverse effects (e.g., hypercalcaemia) due to additive Vitamin D activity.

Population-Specific Notes: Regulatory documents specify that patients with Sarcoidosis require caution due to the risk of increased Colecalciferol metabolism. Additionally, in Severe Renal Insufficiency, Colecalciferol is not metabolized normally, and alternative forms of Vitamin D are noted as necessary.

No mandatory timing-separation rules for single-ingredient Colecalciferol are documented in official regulatory labels.

Mechanism of Action

VDR Agonism and Genomic Signaling

Adrigyl acts as an agonist for the widely distributed Vitamin D Receptor (VDR), a nuclear receptor. This binding triggers a genomic cascade where the VDR/RXR complex modulates the transcription of specific genes. This sustained, transcriptional mechanism controls the synthesis of proteins that dictate the cell's long-term function.


Mineral Homeostasis Regulation

This mechanism centers on the endocrine regulation of serum calcium and phosphate levels. By upregulating key transport proteins in the intestines and coordinating activity in the kidney and bone, Adrigyl's mechanism enhances mineral absorption and reabsorption. The resulting physiological effect is the maintenance of stable mineral balance, which influences the mineralization state of skeletal tissue.


Immunomodulatory and Extraskeletal Effects

Adrigyl engages VDRs on cells outside of the bone, including various immune cells. This mechanism involves the regulation of gene expression in immune cells, influencing factors related to inflammatory pathways and cell proliferation and differentiation. The resulting physiological consequence is an influence on the expression of genes governing cellular activity and morphology in extraskeletal tissues.

Dosage and Administration Information

How to Use Adrigyl (Cholecalciferol Oral Solution) — Official Administration Guidelines

The correct use of Adrigyl, which contains cholecalciferol (Vitamin D3), requires strict adherence to instructions regarding dosing, route, and preparation.


Administration Scope

Feature Official Instruction
Route of administration Oral (swallowed).
Dosing schedule Varies significantly. Doses range from daily prophylaxis (e.g., 400 IU to 2,000 IU) to high-dose therapeutic regimens (e.g., 50,000 IU weekly or single large doses) for treating deficiency. Dosing is highly individualized and must be determined by a healthcare provider.
Preparation requirements The drops may be taken neat or diluted in a cold or room-temperature liquid or semi-liquid food (e.g., milk, juice). The solution must not be mixed with hot liquids or heated.
Age-group rules Specific doses are mandated for infants, children, adults, and pregnant or breastfeeding women.
Special procedural conditions The prescribed dose must be measured accurately using the calibrated dropper provided with the bottle; household measuring spoons must not be used.

Procedural Summary

Official step sequence:

  • Measure the prescribed dose using the provided dropper, ensuring the measurement is accurate for the prescribed IU amount.
  • Administer the drops orally, with or without dilution, ensuring the liquid used is not hot.
  • Adhere strictly to the prescribed frequency (daily, weekly, etc.) and total duration of the treatment course.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Adrigyl (Colecalciferol)

The body of research on Colecalciferol (Adrigyl) is primarily focused on two areas: the correction of Vitamin D deficiency and the support of bone health.


Evidence for Correcting Vitamin D Deficiency

Research, largely consisting of Randomized Controlled Trials (RCTs), monitors how Colecalciferol affects the key biomarker serum 25(OH)D concentration. Studies consistently show that administration of Colecalciferol is a step related to addressing the deficiency by increasing these levels. The research explores how different doses and schedules are associated with shifts in this biomarker. However, evidence indicates that the exact response to a standard dose can vary significantly between individuals. Furthermore, most research focuses on short-term correction rather than examining subsequent long-term disease outcomes.


Evidence for Supporting Bone and Skeletal Health

The role of Colecalciferol in skeletal health has been a primary focus of research, including long-standing observational data and RCTs. Findings indicate that Colecalciferol is a compound studied for the prevention of conditions such as Rickets in children and Osteomalacia in adults, which are associated with severe deficiency. A key limitation is that evidence for skeletal health relies on simultaneous adequate intake of calcium and phosphate in the studied populations.

Evidence on its application for osteoporosis and for studies on the frequency of falls in older adults comes from large-scale, multi-year RCTs. Findings from this extensive body of research have been mixed and inconsistent regarding the reduction in fracture or fall rates when Colecalciferol was used alone in the general older adult populations studied.


What Remains Uncertain About the Research

Scientific reviews note the heterogeneity (variability) of results in fracture prevention trials, particularly when the study population was not pre-selected for deficiency. This means a universal conclusion on its effect across all populations is challenging to draw. Additionally, evidence for the effect on general, non-specific pain or chronic fatigue in individuals who are not severely deficient was observed to be inconsistent, and the long-term effects outside of deficiency correction are not fully established.

Key Studies & References

  1. Cholecalciferol (Vitamin D3) - NIH MedlinePlus Drug Information

Frequently Asked Questions (FAQ)

Common questions about Adrigyl (FAQ)

Q: Is Adrigyl the same thing as a vitamin supplement?

Official classification states that the active ingredient, Colecalciferol, is both a fat-soluble vitamin and a secosteroid prohormone. Regulatory status varies; high-strength formulations used for treating deficiency are typically classified as prescription medicines, while lower doses are often available as supplements.


Q: What are the main reasons someone would stop taking Adrigyl?

Official documents state that cessation of use is described if signs of hypercalcaemia (high blood calcium levels) occur. Discontinuation is also indicated if the patient develops certain conditions that contraindicate its use, such as Hypervitaminosis D or severe renal impairment.


Q: Is Adrigyl a high-risk medication?

The primary risk noted in official safety information relates to chronic overdose, which can lead to Hypervitaminosis D. Potential serious adverse effects documented in these cases include irreversible kidney damage and cardiac arrhythmias.


Q: Does Adrigyl need to be taken with food?

Official information indicates that Colecalciferol is a fat-soluble substance, meaning its absorption from the gut is enhanced when consumed with fat. For this reason, official use conditions often mention administration with a meal to promote optimal absorption.


Q: Is there long-term research data available for Adrigyl?

Studies have examined Colecalciferol over various durations, particularly for correcting deficiency and supporting bone health. However, authoritative scientific reviews note that the evidence regarding some long-term outcomes, such as the reduction in fracture rates across all general older adult populations, has been mixed and inconsistent.


Q: Can Adrigyl be crushed or split if needed?

Adrigyl is an oral solution in drops, not a solid tablet or capsule. As described in the official instructions, the prescribed amount is administered orally in liquid form, typically measured with the calibrated dropper.


Q: Does taking Adrigyl mean I don't need to change my diet?

The regulatory profile indicates that the intended effects of Colecalciferol on skeletal health rely on the simultaneous adequate intake of calcium and phosphate. Official information notes that effects on skeletal health depend on the simultaneous adequate intake of calcium and phosphate.


Q: Does Adrigyl cause any changes in mood or anxiety levels?

Changes in mood or anxiety are not listed as common side effects at therapeutic doses. However, official safety data does document that severe overdose, leading to hypercalcaemia, can potentially result in symptoms such as mental disturbances and confusion.


Q: What is the list of ingredients in Adrigyl?

Adrigyl is a single-ingredient formulation containing the active ingredient Colecalciferol (Vitamin D3). Official product characteristics also list the various excipients (inactive ingredients), which typically include an oil base necessary for the solution.


Q: What are the signs of a serious allergic reaction to Adrigyl?

Official sources note that hypersensitivity reactions are a possibility, although their frequency is not known. Signs of a severe allergic reaction (anaphylaxis) can include difficulty breathing, hives, swelling of the face, lips, tongue, or throat, or chest tightness.


Q: Is Adrigyl linked to bone density changes?

Colecalciferol is essential for regulating the mineral balance required for skeletal tissue mineralization and support. Conversely, chronic overdose can lead to a severe safety concern documented in official data: generalized soft tissue calcification.


Q: Are there different strengths of Adrigyl available?

Yes, the oral solution is commonly marketed in different strength concentrations, often measured in International Units (IU) per milliliter (mL). The required amount is administered based on the specific IU strength prescribed.


Q: Is Adrigyl considered a prescription-only medicine?

The classification depends on the concentration. While lower strengths of Colecalciferol are often available over-the-counter, the high-dose formulations used to treat severe vitamin deficiency are typically classified as prescription-only medicines by regulatory authorities.


Q: Can Adrigyl be taken for a long period of time?

Official guidelines describe that long-term use requires close and regular monitoring. This monitoring specifically checks serum and urinary calcium levels to reduce the risk of hypercalcaemia and potential complications like renal damage.


Q: Does Adrigyl cause fatigue or tiredness?

Fatigue or tiredness is not listed as a common adverse reaction when the drug is taken at prescribed therapeutic doses. However, official regulatory data notes that fatigue is a recognized potential symptom of hypercalcaemia (high calcium levels) resulting from excessive Colecalciferol exposure.


Q: Can Adrigyl make you feel nauseous?

Nausea is not a commonly reported side effect associated with normal therapeutic use. However, official safety information documents that nausea is a recognized symptom of hypercalcaemia or acute overdose.


Q: Is it common to experience headaches with Adrigyl?

Headaches are not listed among the frequently reported adverse reactions documented in regulatory safety data. They are, however, listed as a potential symptom in connection with overdose.


Q: Do any foods or drinks need to be avoided while taking Adrigyl?

Official administration guidance indicates that the oral solution should not be mixed with hot liquids or heated food, as this can affect the product's stability. Some regulatory sources also mention caution regarding the concurrent consumption of grapefruit juice due to potential metabolic interactions.


Q: Is Adrigyl known to interact with common pain relievers?

Official interaction tables generally do not list direct pharmacokinetic interactions for single-ingredient Colecalciferol with common pain relievers. However, regulatory information for combination products containing Vitamin D notes that concurrent use of Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) may worsen existing gastrointestinal irritation.


Q: Where is the official regulatory information about Adrigyl found?

The definitive official information for patients is contained within the Patient Information Leaflet (PIL) or the Summary of Product Characteristics (SmPC). These documents are publicly published on the websites of national regulatory authorities like the EMA, FDA DailyMed, or MHRA/GOV.UK.


Q: Can Adrigyl affect liver function test results?

Routine regulatory safety profiles do not typically list this as a common side effect or adverse reaction. However, high-dose Vitamin D use falls within the disease interaction category of hepatobiliary dysfunction, suggesting potential relevance in cases of severe disease or prolonged, excessive exposure.


Q: Is Adrigyl known to cause dry mouth?

Dry mouth is not listed as a common adverse reaction at therapeutic doses. However, official safety information documents it as a potential symptom of overdose due to its link with hypercalcaemia.


Q: What if I experience mild dizziness after taking Adrigyl?

Dizziness is not listed as a common adverse reaction when Adrigyl is taken at prescribed doses. However, it is a symptom documented in regulatory sources in connection with overdose.

How should Adrigyl be stored and disposed of?

Adrigyl (Colecalciferol oral solution) requires specific conditions to maintain its stability, as mandated by official labeling.

Official Storage and Handling

Requirement Category Condition
Temperature Store at a temperature not exceeding 25 C; keep from freezing.
Protection Must be stored protected from light and moisture in the original container and outer carton.
Child Safety Keep this medicine out of the sight and reach of children (container includes a child-resistant cap).
Stability After Opening Discard 60 days (or in some formulations, 3 months) after first opening the bottle.

Disposal Requirements

Official instructions mandate that the medicine must not be thrown away via wastewater or household waste. Unused or expired Adrigyl must be disposed of by returning it to a pharmacist or following other local regulations established for pharmaceutical waste. Do not use the product after the expiry date printed on the label.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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