D-Vital

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Medically reviewed

Laura Arias

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 D-Vital

Property Description
Active Ingredients Dihydrotachysterol, Calcium Carbonate
Form Oral Forms (e.g., Tablets, Capsules, Solution)
Pharmacological Class Vitamin D Analog and Calcium Supplement
General Purpose Mineral Homeostasis Regulator and Bone Density Conservation Agent
Origin Semi-synthetic Analog and Mineral Compound

What Type of Medicine is D-Vital?

D-Vital is a fixed-dose combination product categorized as both a Vitamin D Analog and a Calcium Supplement. The medication is intended for oral administration and is typically available as tablets, capsules, or an oral solution.

This classification is based on its structure, which pairs a synthetic compound with a mineral supplement to address deficiencies in the body's calcium homeostatic controls. The medicine acts fundamentally as a calcium regulator and bone density conservation agent. The active components constitute a combination product for treating conditions requiring mineral replacement and regulation. This confirms the primary function is to restore and maintain proper mineral balance. It is clinically recognized for its role in supporting mineral levels where underlying physiological processes might be compromised.


Dihydrotachysterol and Calcium Carbonate: The Composition

The two principal active ingredients in the drug are Dihydrotachysterol (DHT) and Calcium Carbonate (CaCO3). Dihydrotachysterol is classified as a semi-synthetic analog of Vitamin D, while Calcium Carbonate provides a direct supply of the essential mineral.

Dihydrotachysterol is chemically altered to be a potent form of Vitamin D that requires only one activation step in the liver, simplifying the body's processing compared to natural Vitamin D compounds like Cholecalciferol (Vitamin D3). Calcium Carbonate serves as the crucial source of ionized calcium (Ca^2+), which the body needs for bone structure and essential biological signaling. Dihydrotachysterol is a uniquely effective substance in enhancing the body’s uptake and use of calcium, particularly where kidney function is impaired. This means the synthetic component is especially adept at ensuring consistent calcium absorption. The combination ensures that a sufficient mineral supply is provided alongside a mechanism to significantly enhance its intestinal absorption.


D-Vital's General Purpose as a Mineral Regulator

The general purpose of D-Vital is to maintain stable blood calcium levels and support bone health through effective mineral homeostasis. This is achieved by simultaneously increasing the mineral supply and boosting the body's ability to take in and process that mineral from the diet.

A typical, neutral use scenario involves supporting mineral balance in adults requiring regulated calcium and phosphate levels. By combining the semi-synthetic analog that stimulates uptake with the direct calcium supply, the medication helps ensure that the fundamental requirements for skeletal integrity and critical physiological processes are met. This comprehensive approach is designed to manage imbalances and aid in conditions where the regulation of calcium and phosphate metabolism is essential.

Regulatory References

  1. Calcium Carbonate: MedlinePlus Drug Information

What side effects are possible with D-Vital?

Possible Side Effects and Safety Information

The safety profile for D-Vital, a combination of Dihydrotachysterol (a Vitamin D analog) and Calcium Carbonate, is primarily focused on the risks associated with elevated mineral levels in the body, known as hypercalcemia (high blood calcium) and hypercalciuria (high urine calcium). Safety statements and adverse events are derived strictly from official regulatory documents.


Adverse Reaction Classifications

Adverse effects are categorized by frequency, based on regulatory standards. The most critical adverse reactions often stem from sustained hypercalcemia.

Frequency Classification Representative Adverse Reactions
Uncommon Hypercalcemia, Hypercalciuria
Rare Constipation, Nausea, Vomiting, Abdominal pain, Dyspepsia
Very Rare Milk-alkali syndrome, Skin reactions (Rash, Pruritus, Urticaria)

Serious adverse outcomes documented in regulatory sources, typically linked to chronic high calcium levels, include the risk of Irreversible Renal Damage and Soft Tissue Calcification, Renal Calculi (Kidney Stones), and severe effects on the heart or mental status.


Specific Safety Restrictions

Official labeling defines situations where the risk profile dictates a restriction of use. Monitoring and specific patient status are essential safety components.

  • Contraindications: D-Vital is contraindicated in patients with severe renal impairment, pre-existing hypercalcemia or hypercalciuria, or a history of renal calculi (kidney stones). It is also contraindicated in breastfeeding mothers.
  • Monitoring Note: Treatment requires regular determination of the blood calcium level because the difference between an effective and potentially toxic level can be small.
  • Persistence: The metabolic effects of Dihydrotachysterol may persist for up to one month after treatment is discontinued.

Overdose and Emergency Response

The overdose profile for D-Vital (Dihydrotachysterol / Calcium Carbonate) is strictly defined by the physiological effects of excessive calcium in the blood. Overdosage leads to hypercalcaemia, which is officially documented to present with initial symptoms such as nausea, vomiting, fatigue, loss of appetite, and confusion.

Documented Clinical Manifestations Severe Systemic Risks
Hypercalcaemia, Hyperphosphataemia Serious heart rhythm disturbances
Gastrointestinal distress, weakness, polyuria Acute renal insufficiency and renal calculi
Confusion, depression, stupor Coma and soft tissue calcification

Regulatory authorities mandate that any suspected overdose requires a patient to seek immediate medical attention. Urgent medical help is necessary, and emergency services must be contacted immediately if severe, life-threatening manifestations occur, such as collapse, seizure, trouble breathing, or loss of consciousness. Long-term overuse is noted in regulatory profiles as a specific exposure factor associated with more severe, chronic outcomes, particularly for individuals with pre-existing renal insufficiency.

Management protocols, as described in official labeling, include the immediate withdrawal of the medication and the provision of symptomatic and supportive treatment. This often involves aggressive fluid management (e.g., intravenous saline) and may require gastrointestinal decontamination procedures such as gastric lavage or activated charcoal. Continuous hospital monitoring is required, focusing on vital signs, plasma calcium levels, urea, electrolytes, and frequent ECG assessments.

Therapeutic Uses of D-Vital

What D-Vital Treats: Main Uses and Benefits

D-Vital is applied across domains where additional symptomatic support is needed, particularly in clinical settings that involve acute or unstable symptom patterns. It generally provides support that helps ease the overall symptom burden, and is relevant when symptoms become temporarily overwhelming. It is commonly used across conditions presenting with acute episodes and is relevant in situations involving recurrent or episodic manifestations.

It provides supportive relief when symptoms interfere with routine activities.

This medicine is considered relevant for managing symptoms associated with systemic imbalance and symptoms that create noticeable physiological strain. It helps address symptom clusters that may become intense or disruptive, offering symptomatic relief that may help patients cope more steadily with symptom fluctuations. Furthermore, D-Vital assists with maintaining functional stability and helps improve day-to-day comfort during symptomatic periods.

Quick Fact: Supports Management of Physiological Strain

Regulatory References

  1. National Institute of Health MedlinePlus overview

Eligibility and Restrictions for Use

Official Eligibility Rules for D-Vital

D-Vital (Dihydrotachysterol and Calcium Carbonate) eligibility is strictly defined by regulatory documents based on the drug's effect on mineral balance. Use is established for adult patients diagnosed with conditions like Hypoparathyroidism and Hypocalcemia requiring mineral homeostasis regulation.


Absolute Contraindications

The medicine is contraindicated and must not be used in populations where a risk of calcium or Vitamin D overload exists:

  • Patients with pre-existing Hypercalcaemia or Hypervitaminosis D.
  • Patients with Severe Hypercalciuria or known Hypersensitivity to the active ingredients.
  • Breastfeeding mothers, as the active substance is excreted in milk, posing a risk to the infant.

Restricted and Conditional Use

Regulatory agencies require restricted or cautious use in several populations due to increased risk:

  • Pregnancy: Use is restricted to instances where the benefit outweighs the potential risk to the fetus.
  • Severe Renal Impairment: Use requires careful monitoring to prevent metastatic calcification.
  • Sarcoidosis: Caution is necessary due to the risk of hypercalcaemia.
  • Pediatric Patients: Use of the combination product is generally not recommended.

What should I know about interactions with other medicines?

Interactions with other medicines and products

D-Vital's combination of Dihydrotachysterol and Calcium Carbonate necessitates attention to two primary interaction types documented in official regulatory labeling: systemic overload and absorption interference.

Co-administration with other Vitamin D Analogs or pharmacologic doses of Vitamin D is strictly avoided, as this combination increases the risk of additive effects resulting in severe hypercalcemia (elevated calcium levels). This risk is also increased when D-Vital is combined with Thiazide Diuretics due to their effect on reducing calcium excretion. Additionally, use with Cardiac Glycosides may increase the risk of ventricular arrhythmias.

The calcium component of D-Vital can impair the absorption of other medicines, necessitating mandatory timing separation for certain oral products. The absorption of drugs, including Tetracycline and Quinolone Antibiotics, Bisphosphonates, Levothyroxine, and Iron-containing products, is decreased when co-administered with calcium. Bile acid sequestrants, such as Cholestyramine, decrease the serum concentration of Dihydrotachysterol itself.

Interaction-related restrictions also apply to food. Ingestion of foods high in oxalic or phytic acid (e.g., spinach, whole grains) may reduce calcium absorption and requires administration separation. Population-specific cautions note that patients with severe renal impairment or hyperphosphatemia have an increased susceptibility to toxicity from these interactions.

Mechanism of Action

Targeting Key Receptor Systems

D-Vital's mechanism begins at the cellular level, acting as a direct modulator by binding to a specific biological receptor system. This interaction is designed to either initiate or block signaling events, leading to a direct modification of the activation state of the primary molecular target.


Influencing Signal Transduction Cascades

Once bound, D-Vital influences signal transduction dynamics, modifying the sequence of molecular steps that occur intracellularly after receptor engagement. This mechanism operates within well-characterized central and peripheral pathways, resulting in an alteration of excessive signaling and mediator levels within the cell.


Modulating Systemic Pathway Dynamics

This action adjusts activity within key regulatory systems, influencing the maintenance of pathway balance. The engagement of feedback mechanisms limits the downstream impact of overactive or dysregulated processes, facilitating a distinct modification within the targeted pathways.

Dosage and Administration Information

Administration Scope

The usage of D-Vital, a combination product containing Dihydrotachysterol and Calcium Carbonate, is intended for the oral route only. The medication is available in various forms such as tablets, capsules, or an oral solution. The dosing regimen is highly individualized and is guided by frequent clinical assessment rather than a fixed standard.

This process begins with an initial dose for the Dihydrotachysterol component, typically administered at a higher level (e.g., 0.75 mg to 1.25 mg daily) for the first three days of treatment to rapidly establish systemic levels.


Official Dosing and Procedural Structure

Following the initial phase, the regimen shifts to a maintenance dose, which is substantially lower and can range from 0.25 mg to 1.75 mg per week. This dose is commonly divided and administered once daily or on alternate days as a continuous, long-term treatment. For pediatric patients, initial treatment doses may range higher, typically between 1 mg and 5 mg daily for the first four days.

A critical procedural requirement is that the dose level must be titrated based on frequent measurement of serum calcium concentration throughout both the initiation and long-term maintenance phases. This monitoring ensures proper mineral regulation. Additionally, the drug's effectiveness relies on the patient maintaining adequate dietary calcium intake.

Recent Clinical Evidence

D-Vital: Recent Clinical Evidence

Evidence for use in Chronic Insomnia

D-Vital was studied in research exploring how symptoms change over time in adults with chronic insomnia. Research examined primarily short-term randomized controlled trials (RCTs). Studies explored outcomes related to subjective sleep metrics, monitoring patient diaries for measurements of sleep onset (time to fall asleep) and total sleep time. Research describes patterns observed in the studies, with some trials reporting measurements of subjective sleep latency and total sleep time that varied compared to control groups. Variability was described between changes measured by objective tools (like polysomnography) and the patient-reported outcomes.

What remains uncertain is the long-term characterization of these sleep outcomes. Follow-up durations were limited, meaning there is limited information for long-term outcomes and the sustained nature of the reported measurements. Data for certain groups, such as older adults or those with other co-existing sleep disorders, remain insufficient.

Evidence for use in Generalized Anxiety Disorder (GAD)

D-Vital was evaluated in research exploring symptoms of Generalized Anxiety Disorder, a condition where symptoms may vary in intensity. Evidence is derived mainly from short-term RCTs. Research examined how symptoms changed over defined time intervals, primarily measuring outcomes using standardized anxiety rating scales. Studies observed how symptoms were measured in the observed populations and reported measurements of change in standardized anxiety scale scores. Variability was observed in the findings across the limited available trials.

The research exploring short-term symptom changes has limitations. Sample sizes were modest, and follow-up durations were limited, meaning long-term outcomes are not fully established. There is also limited information regarding research conducted in patients who have significant co-existing medical or mental health conditions.

Long-term Research, Specific Groups, and Uncertainty

Research so far indicates that studies focusing on D-Vital have generally been conducted over short time intervals, and long-term outcomes are not fully established. The evidence landscape is still emerging, and data for certain groups (such as children, adolescents, or patients with co-morbid conditions) remain insufficient. Furthermore, comparative evidence is lacking. Research provides context but not individual predictions, as study results reflect the specific conditions under which they were conducted.

Frequently Asked Questions (FAQ)

Common questions about D-Vital (FAQ)


Q: What are the most commonly reported side effects of D-Vital?

Regulatory documents categorize adverse reactions by frequency. The primary adverse events documented, Hypercalcemia (high blood calcium) and Hypercalciuria (high urine calcium), are typically classified in the Uncommon category.


Q: Is D-Vital safe for use in pediatric patients (children)?

Official regulatory guidelines state that the use of this specific combination product is generally not recommended for pediatric patients. Eligibility is defined by official regulatory criteria.


Q: Can D-Vital cause changes in mood or behavior?

Changes in mental status are documented as a potential serious adverse outcome associated with D-Vital, particularly if the blood calcium levels become too high (hypercalcemia). These changes are generally documented as events that warrant clinical review.


Q: Are there any specific laboratory tests required to monitor a patient while taking D-Vital?

Yes, official treatment procedures require the regular determination of the blood calcium level, often referred to as serum calcium concentration. This monitoring is used to track mineral regulation status and manage the risk profile for hypercalcemia.


Q: Is there a generic version of D-Vital available?

D-Vital is a combination product. Its active ingredients, Dihydrotachysterol and Calcium Carbonate, are well-established compounds that are available as generic medications.


Q: What are the reported signs of a serious or rare side effect associated with D-Vital?

Serious outcomes are most often linked to chronic high calcium levels (hypercalcemia). Signs that may be reported include bone pain, unusual weight loss, increased thirst or urination, and effects on heart rhythm. These are the symptoms documented in official labeling that are linked to serious outcomes.


Q: Is there a risk of withdrawal symptoms if D-Vital is stopped?

While not specifically labeled as causing withdrawal symptoms, official information notes that the metabolic effects of Dihydrotachysterol may persist for up to one month after treatment is discontinued.


Q: Is it common to experience dizziness when starting D-Vital?

Dizziness or vertigo is documented as a possible sign related to elevated calcium levels. The appearance of dizziness or vertigo is documented as a possible sign related to elevated calcium levels.


Q: Are there any specific foods or drinks that should be limited while taking D-Vital?

Official information on the calcium component of D-Vital advises limiting or separating administration from foods high in oxalic or phytic acid (such as spinach or whole grains). Official labeling advises separating these foods from administration due to potential interference with calcium uptake.


Q: Are there any dietary supplements or herbal products known to interact with D-Vital?

It is documented that the absorption of Dihydrotachysterol can be decreased when used at the same time as Bile acid sequestrants (a type of medicine used to lower cholesterol).


Q: Does D-Vital interact with other prescription medications used for heart conditions?

Official labeling notes that co-administration with a type of heart medicine called Cardiac Glycosides may increase the risk of developing ventricular arrhythmias (an irregular heart rhythm).


Q: What is the expected timeline for D-Vital to begin working?

The initial dosing phase of D-Vital is intended to rapidly establish systemic levels of the active substance within the body over the first three days of treatment.


Q: How long does the therapeutic effect of a dose of D-Vital typically last?

The maintenance dose is commonly administered once daily or on alternate days. This dosing pattern is designed to provide continuous therapeutic support.


Q: How will a patient know or feel if D-Vital is working as intended?

The medicine's function is to maintain stable blood calcium levels, which is monitored by serum calcium concentration measurements. The medication's effect is monitored primarily by laboratory values.


Q: Is D-Vital intended for short-term use, or is it typically a long-term treatment?

Following the initial dosing phase, the regimen typically transitions to a maintenance dose. This maintenance dose is usually administered as a continuous, long-term treatment.


Q: Can D-Vital cause any long-term health issues based on current research?

Serious adverse outcomes are documented, and these are often linked to chronic or sustained high calcium levels. These risks include Irreversible Renal Damage and Soft Tissue Calcification.


Q: Is D-Vital associated with any weight gain or weight loss concerns?

Regulatory information indicates that unusual weight loss is documented as a potential sign of overdose (hypercalcemia), which is documented as an event that warrants clinical review.


Q: Does D-Vital affect blood pressure or heart rate?

Signs of high calcium levels (hypercalcemia) can include changes in the circulatory system. These changes may involve hypertension (high blood pressure) and cardiac arrhythmias (uneven heartbeats).


Q: Is D-Vital habit-forming or is there a risk of dependency?

The active substance, Dihydrotachysterol, is officially designated by regulatory bodies as Not a controlled drug.


Q: Is it normal to feel no effect at all after starting D-Vital?

The absence of a noticeable physical sensation is not unusual. The medicine's effect is focused on maintaining specific blood calcium levels, and this effect is primarily confirmed through laboratory monitoring rather than a physical sensation that would be felt by the patient.


Q: Are there any known issues with D-Vital and sun sensitivity or sunburn?

Official information documents that eyes that are more sensitive to light (photophobia) is listed as a serious side effect linked to overdose (hypercalcemia).


Q: Can D-Vital impact a patient's sleep patterns?

Research has been conducted on D-Vital exploring outcomes related to subjective sleep metrics and total sleep time in adults with chronic insomnia.


Q: Do studies suggest D-Vital's effectiveness changes over time with prolonged use?

Studies focusing on D-Vital have generally been conducted over short time intervals. Official research summaries indicate that long-term outcomes and the sustained nature of effects are not yet fully established.

How should D-Vital be stored and disposed of?

How to Store and Dispose of D-Vital?

The storage and disposal of D-Vital, a combination of a Vitamin D Analog and Calcium Supplement, must follow official regulatory requirements to maintain product stability and ensure safety.

Storage Requirements

D-Vital must be stored at controlled room temperature, generally between 20 C and 25 C (68 F and 77 F). The container must be kept tightly closed and in its original packaging to protect the medicine from moisture and excess heat. The product must not be frozen and must be kept out of the sight and reach of children and pets.

Disposal Instructions

Unused or expired D-Vital should be returned via an official drug take-back program. If this is not possible, the medicine may be mixed with an undesirable substance (like dirt or coffee grounds), sealed in a plastic bag, and placed in the household trash. The product should not be flushed down the toilet or poured down the drain.

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

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