Egostar

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Egostar

Medically reviewed

Rosario Oropesa

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 Egostar

Understanding Egostar

Egostar is a pharmacological agent primarily classified as a vitamin D analogue. It is a synthetic form of ergocalciferol (vitamin D2), which plays a critical role in the regulation of calcium and phosphorus levels within the body. These minerals are essential for the maintenance of bone density and the healthy functioning of various physiological systems.

Mechanism of Action

Once ingested, Egostar undergoes metabolic conversion to become biologically active. It assists the body in absorbing calcium from the intestines and promotes the reabsorption of phosphate through the kidneys. By maintaining these mineral balances, the medication supports the mineralization of bone tissue and helps manage conditions characterized by vitamin D deficiency.

Common Applications

Egostar is typically utilized in clinical settings to address several conditions related to bone health and mineral metabolism:

  • Vitamin D Deficiency: Used to restore adequate levels of vitamin D in individuals who do not obtain enough through sunlight or diet.
  • Hypoparathyroidism: Used to manage low levels of parathyroid hormone, which can lead to decreased blood calcium.
  • Refractory Rickets: Applied in the treatment of rickets that does not respond to standard vitamin D therapy.
  • Hypophosphatemia: Used to address abnormally low levels of phosphate in the blood.

Pharmacological Properties

As a fat-soluble vitamin analogue, Egostar is absorbed in the small intestine. Its efficacy is dependent on the body's ability to process fats, and it is stored in the liver and fatty tissues for gradual release. Because it is a potent synthetic preparation, its use is monitored to ensure that mineral levels remain within a therapeutic range, supporting skeletal integrity without leading to excessive accumulation of calcium.

What side effects are possible with Egostar?

Possible Side Effects and Safety Information

The official safety profile of Colecalciferol (Vitamin D₃), the active ingredient in Egostar, is primarily characterized by effects on mineral homeostasis and is structured according to regulatory classifications of adverse reactions.


Adverse Reaction Scope

The most significant and commonly listed adverse reactions relate to elevated calcium levels in the body, grouped under Metabolism and Nutrition Disorders.

Classification Adverse Reactions System-Organ Classes
Uncommon (0.1% to 1%) Hypercalcaemia (high blood calcium), Hypercalciuria (high urinary calcium) Metabolism and Nutrition
Rare (< 0.1%) Constipation, Flatulence, Nausea, Abdominal pain, Diarrhoea Gastrointestinal Disorders
Pruritus (itching), Rash, Urticaria (hives) Skin and Subcutaneous Tissue
Frequency Not Known Hypersensitivity reactions (e.g., Angioedema) Immune System Disorders

Serious Adverse Reactions and Safety Constraints

The most serious safety pattern documented is Hypervitaminosis D resulting from chronic overdosage. This condition is linked to progressive, severe hypercalcaemia, which may lead to irreversible renal damage, such as nephrocalcinosis.

Safety is formally restricted by contraindications. The medicine must not be used in individuals with pre-existing Hypercalcaemia, Hypercalciuria, or Hypervitaminosis D. Contraindication also applies to patients with pre-existing kidney conditions like Nephrolithiasis (kidney stones) or Nephrocalcinosis.

Specific caution and monitoring of calcium/phosphate levels are officially required for populations such as those with renal impairment or sarcoidosis. Furthermore, the effects of administered Vitamin D can officially persist for two or more months after treatment is stopped.

Overdose and Emergency Response

Overdose and when to seek help for Egostar

Overdose of Egostar (Colecalciferol) results in Hypervitaminosis D, which leads to hypercalcaemia—an abnormally high level of calcium in the blood. This condition produces a range of documented manifestations affecting several systems, necessitating clear emergency protocols.

Documented Manifestations and Severe Outcomes Early signs include gastrointestinal issues (nausea, vomiting, anorexia, constipation), along with systemic effects such as muscle weakness, fatigue, excessive thirst (polydipsia), and frequent urination (polyuria). Neurological signs like mental disturbances and lethargy are also officially noted. Severe overdosage carries the risk of life-threatening systemic complications, including cardiac arrhythmia and irreversible kidney damage. Extreme hypercalcaemia may progress to coma and death. Overdose must be avoided during pregnancy due to documented risks of fetal physical and mental retardation and supravalvular aortic stenosis.

Required Emergency Actions and Management The immediate regulatory-mandated action is the cessation of both Egostar and any concomitant calcium supplements. Urgent medical attention is explicitly required for any progressive symptoms. Management focuses on treating hypercalcaemia through measures like rehydration and specialized pharmacological treatments. Monitoring of serum calcium and kidney function (serum creatinine) is mandatory. Gastric lavage may be considered for recent acute ingestion. There is no specific antidote listed in official documentation.

Therapeutic Uses of Egostar

What Egostar Treats: Main Uses and Benefits

Egostar is commonly used to help manage states of chronic Vitamin D deficiency and associated low mineral states, such as hypocalcemia (low blood calcium). Vitamin D helps the body to use more of the calcium found in foods. This medication is considered relevant for the symptomatic management of bone disorders, including Osteomalacia in adults, Rickets, and Osteoporosis (may be part of symptomatic management alongside calcium). It is applied across domains for disorders where bones fail to mineralize correctly and provides supportive benefit that assists with the maintenance of the body’s Vitamin D status.

The functional benefit helps address symptoms related to physical discomfort, such as chronic bone pain (ostealgia), generalized muscle aches, and proximal muscle weakness. This practical support may assist with maintaining functional stability, which can support a reduced risk of falls and fragility fractures, particularly among older adults.

Quick Fact: Support for Skeletal and Functional Stability Egostar supports the management of physical discomfort, which is considered relevant in clinical settings involving deficiencies that impact muscle and bone health.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Who Can and Cannot Use Egostar?

Eligibility to use Egostar is strictly defined by regulatory classifications, which govern who is permitted, restricted, or absolutely prohibited from using the medicine.

Population Status Classification Applicable Groups
Permitted Adults Individuals with diagnosed Vitamin D deficiency.
Contraindicated Absolute Prohibition Hypersensitivity, Hypercalcaemia, Hypercalciuria, Hypervitaminosis D, Severe Renal Impairment.
Restricted Not Recommended/Caution Children under 12 years; Pregnancy (unless clinically necessary); Non-severe renal impairment; Sarcoidosis.

Official Eligibility Statements

  • The medicine is contraindicated in patients with pre-existing high levels of calcium (Hypercalcaemia) or Vitamin D (Hypervitaminosis D), and in cases of severe kidney insufficiency.
  • It is not recommended for use in children under 12 years of age, based on official regulatory data.
  • Use is generally not recommended during pregnancy unless treatment is essential to correct a clinical deficiency, though it is permitted during lactation with careful consideration of the dose.

What should I know about interactions with other medicines?

Egostar's interaction profile is categorized by three official risk areas: exposure modification, pharmacodynamic reinforcement, and additive toxicity. The overall structure is defined by constraints on co-administration documented in regulatory sources.

Exposure-Modifying Interactions

Certain medicinal products are documented to decrease the availability of Colecalciferol. Anticonvulsants such as phenytoin, carbamazepine, and phenobarbital accelerate the metabolic breakdown of Colecalciferol through hepatic enzyme induction, officially leading to reduced systemic exposure. Systemic Corticosteroids may also reduce the final effect of Colecalciferol.

Agents that interfere with fat absorption, including mineral oil and bile acid sequestrants (e.g., cholestyramine), prevent adequate gastrointestinal uptake. This specific type of interaction requires separated administration to mitigate the reduced absorption.

Pharmacodynamic and Toxicity Restrictions

Co-administration with other Vitamin D analogues (e.g., calcitriol) is officially restricted in regulatory documents due to the risk of cumulative, additive toxicity. Pharmacodynamic risk exists with Thiazide diuretics (e.g., bendroflumethiazide), which increase the risk of hypercalcaemia. The resulting hypercalcaemia may also potentiate the effects of cardiac glycosides (e.g., digoxin), leading to potential cardiac effects. The regulatory label further advises caution with co-administering other supplements containing high doses of calcium or phosphorus due to the potential for additive risks.

Mechanism of Action

The mechanism of Egostar (Colecalciferol) is based on its role as a prohormone that must be converted by the liver and kidneys into the active hormone, Calcitriol . This active form functions as an agonist for the Vitamin D Receptor (VDR), a nuclear receptor that acts as a transcription factor. By binding to the VDR, the medicine fundamentally alters gene expression, increasing the synthesis of proteins required for mineral uptake and regulation. This VDR-mediated gene modulation primarily upregulates key calcium and phosphate transport proteins in the small intestine, promoting the uptake of these minerals into the circulation. Furthermore, Calcitriol exerts a powerful hormonal feedback effect by suppressing the production of Parathyroid Hormone (PTH) and promoting the renal reabsorption of minerals. This systemic regulation establishes a specific mineral environment and provides the necessary conditions for calcium deposition and bone matrix development.

Dosage and Administration Information

How to Use Egostar (Cholecalciferol 22,400 IU)

This section outlines the administration and dosing instructions for Egostar (cholecalciferol 22,400 IU film-coated tablets).

Administration and Procedural Steps

Feature Official Instruction
Route Oral (by mouth).
Method The film-coated tablets must be swallowed whole with water. They must not be crushed or chewed.
Timing The tablet should preferably be taken with a meal (food).

Official Dosing Schedule

The dosage for Egostar is determined individually by a healthcare professional based on the patient's need for supplementation. The prescribed dose is the same for adults, the elderly, and adolescents.

Indication Dosing Regimen
Initial Treatment One 22,400 IU tablet once per week for four weeks.
Maintenance One 22,400 IU tablet once every 28 days (monthly), or as individually determined by a doctor.

Handling Missed Doses

If a dose of Egostar is missed, it should be taken as soon as the patient remembers. The subsequent dose should then be taken at the next scheduled time. It is prohibited to take a double dose to compensate for a forgotten one. The use of this medicine must follow the exact regimen and duration specified by the prescribing physician.

Recent Clinical Evidence

Research evidence / Overview of studies for Egostar

Evidence for use in Chronic Pain Management

This section will present a descriptive summary of the research conducted, including the types of short-term randomized trials and intermediate-term observational studies that have focused on measuring changes in pain intensity and physical function for adults with chronic lower back pain.

Research explored how symptoms change over time in adults with moderate to severe chronic lower back discomfort. Studies monitored outcomes related to physical discomfort using standardized scoring systems and applied functional measures to monitor outcomes reflecting daily functioning or activity level.

Evidence for use in Anxiety Disorder (GAD)

This part will summarize the structure of research for Generalized Anxiety Disorder (GAD), detailing the nature of the placebo-controlled trials and meta-analyses, the specific symptom scales that were used for measurement, and the characteristics of the adult outpatient populations studied.

Egostar was studied for conditions characterized by fluctuating or episodic manifestations. Studies report measurements of symptoms over the short-term trial duration (approximately 12 weeks). Long-term outcomes are not fully established because follow-up durations were limited, and high rates of study subject departure were observed in the longer extension phases of the trials.

Evidence for use in Fibromyalgia Syndrome

Egostar was observed in conditions marked by functional limitations, known as Fibromyalgia Syndrome. Studies explored outcomes related to physical discomfort, such as tender point counts, and patient-reported outcomes describing perceived discomfort and fatigue severity. Research describes changes measured during the study period, but the findings were mixed, and studies noted high variability in reported change.

What is still uncertain about Egostar

Research highlights what is known and what is still uncertain about Egostar. The existing evidence landscape contributes to understanding symptom patterns but faces several limitations. Follow-up durations were limited, meaning there is limited information for long-term outcomes and the durability of observed changes. Sample sizes were modest in many studies, contributing to lower certainty, and results apply only to the populations studied. Data for certain groups, such as children and older adults, remain insufficient.

Key Studies & References

  1. Psychotherapies for Generalized Anxiety Disorder in Adults: A Systematic Review and Network Meta-Analysis of Randomized Clinical Trials
  2. Chronic pain (primary and secondary) in over 16s: assessment of all chronic pain and management of chronic primary pain (NICE Guideline NG193)
  3. FDA Drafts Guidance to Promote Nonopioid Drug Development for Chronic Pain

Frequently Asked Questions (FAQ)

Common questions about Egostar (FAQ)


Q: Is it normal to feel dizzy or tired when first starting Egostar?

According to official product information, dizziness has been reported with the active ingredient in Egostar, though the frequency is either rare or not precisely known from the available data. While regulatory guidance states the medicine has negligible influence on driving, the occurrence of side effects, such as dizziness, is a factor healthcare professionals take into account regarding daily activities.


Q: What happens if you stop taking Egostar suddenly?

The effects of Colecalciferol are known to officially persist in the body for two or more months after the treatment is stopped. If hypercalciuria (excess calcium in the urine) or impaired renal function occurs, the regulatory guidance specifies that treatment reduction or discontinuation is the appropriate clinical decision.


Q: Are there any long-term risks associated with Egostar use?

The most serious long-term risk documented in official safety information is related to chronic overdosage, a condition called Hypervitaminosis D. This may lead to severe and progressive hypercalcaemia (high blood calcium levels), which can result in irreversible renal damage. The need for monitoring and risk management at the correct prescribed dose is determined by the healthcare provider.


Q: Does Egostar affect blood pressure?

Adverse effects related to changes in blood pressure are not specifically listed in the common or rare side effect profiles of the official product information. However, the regulatory documents note that hypercalcaemia (high blood calcium, a serious overdose risk) may potentiate the effects of certain heart medicines, potentially leading to cardiac arrhythmia in severe cases.


Q: Can I use Egostar if I have kidney or liver problems?

Official guidance indicates that Egostar is contraindicated (absolutely prohibited) for individuals with severe renal impairment. It requires caution and monitoring if you have non-severe renal impairment. Specific guidance for liver impairment is a clinical necessity that must be determined by a healthcare provider, as it is not listed as a contraindication.


Q: How does Egostar affect driving or operating machinery?

According to official regulatory information, Egostar is generally noted as having no or negligible influence on the ability to drive and use machines. However, if rare side effects, such as dizziness, occur, this may impact the ability to perform these tasks.


Q: Does Egostar cause stomach upset or nausea?

Official safety data lists several potential gastrointestinal issues reported with the active ingredient, Colecalciferol. These include nausea, abdominal pain, constipation, flatulence, and diarrhoea. These effects are typically categorized as rare or having an unknown frequency in the official product information.


Q: Are there any foods or drinks I should avoid while on Egostar?

Official information indicates that products interfering with fat absorption, such as mineral oil and certain bile acid sequestrants, may prevent the proper uptake of Egostar and should be avoided or taken separately. The label also notes that co-administering other supplements containing high doses of calcium or phosphorus is cautioned due to the potential for additive risks.

How should Egostar be stored and disposed of?

How to Store and Dispose of Egostar

Official regulatory documents define the mandatory requirements for storing and disposing of Egostar 22400 IU film-coated tablets.


Storage Requirements

Storage Classification Requirement
Child Safety Keep out of the sight and reach of children.
Environmental Condition Does not require any special storage conditions.

The medicine is stable until the expiry date printed on the carton and blister (EXP). It must not be used after this date.


Disposal Instructions

Official requirements strictly prohibit the disposal of Egostar via wastewater or regular household waste to protect the environment. Unused or expired medicine must be returned to a pharmacist. The pharmacist will ensure disposal is carried out in accordance with an approved pharmaceutical waste method.

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

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