Cavit-D3

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Cavit-D3

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Cavit-D3

Quick Facts

Property Description
Active ingredient Calcium Hydrogen Phosphate, Colecalciferol (Vitamin D3)
Form Tablet, Capsule (Oral)
Pharmacological class Nutritional Supplement (Calcium Salt and Vitamin D Analog)
General purpose Maintenance of Bone Health and addressing deficiencies
Type Combination Product

Defining Cavit-D3: Class, Composition, and Identity

Cavit-D3 is formally defined as an Oral Combination Product within the pharmacological class of Nutritional Supplements for supporting skeletal health. The two active ingredients are the mineral Calcium Hydrogen Phosphate and the fat-soluble vitamin Colecalciferol (Vitamin D3). This formulation integrates a synthetic mineral calcium salt with a biologically derived Vitamin D Analog. The preparation is typically supplied in Tablet or Capsule forms suitable for ingestion, distinguishing it from single-ingredient supplements.

The Dual Role and General Purpose of the Active Ingredients

The rationale behind Cavit-D3’s dual composition is rooted in the synergistic actions of its components. Calcium Hydrogen Phosphate supplies the structural foundation—the calcium and phosphate ions essential for bone strength. The co-ingredient, Colecalciferol, acts as an indispensable prohormone that promotes intestinal calcium absorption and utilization. This indicates that the Vitamin D component is vital for ensuring the body can utilize the calcium provided. The general purpose of this Combination Product is to support bone homeostasis by supplying the necessary mineral foundation and regulating its proper uptake.

Cavit-D3 as a Source of Essential Nutrients

The overall therapeutic aim of this supplement is to maintain adequate levels of its constituents, thereby supporting vitamin D status and preventing calcium deficiency within the Target Audience. By facilitating calcium absorption and providing the mineral base, Cavit-D3 aids in the structural preservation of the skeleton. This support for bone health is a key focus for individuals, including Older Adults, whose nutritional intake or absorption efficiency of these essential nutrients may be inadequate.

Regulatory References

  1. MedlinePlus - NIH
  2. NIH Office of Dietary Supplements

What side effects are possible with Cavit-D3?

Possible Side Effects and Safety Information

The safety profile of Cavit-D3 (Calcium Carbonate/Cholecalciferol) is characterized by the risk of elevated calcium levels. Regulatory documents outline adverse reactions by frequency and include specific warnings and restrictions.

Frequency-Classified Adverse Reactions

The table below shows the adverse reactions documented in official regulatory sources:

Frequency Affected System Adverse Reaction
Uncommon Metabolism and nutrition disorders Hypercalcaemia (high blood calcium), Hypercalciuria (high urine calcium)
Rare Skin and subcutaneous disorders Pruritus (itching), Rash, Urticaria (hives)
Not Known Immune / Gastrointestinal disorders Hypersensitivity reactions (e.g., angio-oedema), Constipation, Flatulence, Nausea, Abdominal pain, Diarrhoea

Serious Adverse Reactions

Serious outcomes are primarily linked to overdose or prolonged, persistent hypercalcaemia. These include the potential for renal impairment (kidney damage), nephrocalcinosis, nephrolithiasis (kidney stones), and vascular/soft tissue calcification.

Safety Restrictions and Monitoring

Cavit-D3 is contraindicated in patients with pre-existing Hypercalcaemia, Hypercalciuria, Severe Renal Impairment, Nephrolithiasis, or Hypervitaminosis D.

Monitoring is required during long-term treatment, particularly for serum calcium and urine calcium levels, and in high-risk groups such as patients with renal impairment, sarcoidosis, or those taking cardiac glycosides (heart medicines) or thiazide diuretics (water pills). Overdose must be strictly avoided during pregnancy due to documented risks to the developing fetus.

Overdose and Emergency Response

Overdose and when to seek help

The information in this section is based strictly on descriptions found in official government regulatory documents (e.g., FDA, EMA). Overdose of the Cavit-D3 combination product (Calcium and Colecalciferol) primarily results in hypercalcaemia.

Documented Overdose Presentations

Manifestation Type Official Regulatory Descriptions
Clinical Signs Early symptoms documented include nausea, vomiting, anorexia, abdominal pain, polydipsia, and polyuria. Late manifestations may involve muscle weakness and somnolence.
Severe Outcomes Documented serious effects include renal impairment, cardiac arrhythmias, hypertension, and the formation of kidney stones. Prolonged, severe hypercalcaemia carries the risk of a fatal outcome.

Required Emergency Actions

The regulatory instructions mandate that individuals seek immediate medical attention upon suspicion of an overdose. It is required to stop all calcium and vitamin D intake immediately.

Management described in official labeling is symptomatic and supportive, often requiring continuous monitoring of serum calcium concentration and renal function, as no specific antidote is known for this overdose. Individuals with impaired renal function or those who are infants or children may have increased susceptibility to the toxic effects of overdose.

Therapeutic Uses of Cavit-D3

What Cavit-D3 Treats: Main Uses and Benefits

Cavit-D3, a combination of calcium and Vitamin D3 (cholecalciferol), is used to help manage conditions related to nutritional and skeletal health.

This supplement is commonly used to address symptoms linked to deficiencies and to support general bone treatment.


Supporting Bone and Teeth Health

This is the central use of the supplement, applied in contexts marked by increased discomfort or tension related to physical symptoms. Calcium and Vitamin D3 are applied across domains where additional symptomatic support for physical comfort is needed. Together, they support bone density and help maintain skeletal stability. It is often used to help manage symptoms associated with conditions like osteoporosis and osteomalacia.


Symptom Management and Deficiency Support

Cavit-D3 is applied across domains where additional symptomatic support is needed, such as in cases of diagnosed elemental calcium and/or vitamin D deficiency, especially in the elderly. It helps address symptom clusters that may become intense or disruptive, contributing to improved day-to-day comfort.


Quick Facts

  • Therapeutic Domain: Used in situations involving certain distressing symptoms related to bone density.
  • Condition Categories: Relevant in conditions characterized by periods of heightened symptoms due to nutritional deficits.
  • Patient Benefit: Provides supportive relief when symptoms interfere with routine activities.

Eligibility and Restrictions for Use

Cavit-D3 (Cholecalciferol) use is determined by regulatory-defined contraindications and population-specific restrictions, primarily based on the risk of calcium and Vitamin D overload.

Populations for whom use is Contraindicated

Use is strictly prohibited for individuals with Hypercalcaemia (high blood calcium), Hypercalciuria (high urinary calcium), Hypervitaminosis D (high Vitamin D levels), or a known Hypersensitivity to the active substance or excipients like soya oil. The medicine is also contraindicated in those with Severe Renal Impairment and kidney stone conditions such as Nephrolithiasis.

Age, Pregnancy, and Conditional Use

High-dose formulations are contraindicated for pregnant and breastfeeding women; lower-dose products may be used if medically necessary. Use is generally not recommended for children under 12 for specific high-strength preparations. Special caution and clinical monitoring are required for patients with conditions like Sarcoidosis, Pseudohypoparathyroidism, and any degree of Renal Function Impairment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Officially documented interaction patterns for Cavit-D3 (Calcium and Colecalciferol/Vitamin D3) are structured around effects on mineral balance and drug absorption, as outlined in government regulatory sources.

Documented Interaction Classifications

Interaction Type Interacting Substances/Class
Contraindicated Other Vitamin D analogs or metabolites (e.g., Calcitriol)
Pharmacodynamic Risk Cardiac Glycosides (e.g., Digoxin), Thiazide Diuretics
Reduced Effectiveness Anticonvulsants (e.g., Phenytoin), Glucocorticoids, Rifampicin
Impaired Absorption Bile Acid Sequestrants, Mineral Oil

Mandatory Timing Separation Rules

The calcium component can officially reduce the absorption of co-administered medicines, requiring mandatory time separation between doses. This rule applies to drugs such as Tetracycline and Quinolone antibiotics, Bisphosphonates, and Levothyroxine.

Food and Population Considerations

Foods high in oxalic acid (e.g., spinach) or phytic acid (e.g., bran) are documented to decrease calcium absorption by forming insoluble salts. Regulatory documents note that in patients receiving cardiac glycosides, the risk of cardiac arrhythmias is officially exacerbated by potential increases in serum calcium. Special caution is also noted for patients with renal impairment, where Vitamin D metabolism is altered, increasing the risk of calcification when co-administered with related treatments.

Mechanism of Action

Genomic Modulation of Calcium Transport

Cavit-D3, containing Vitamin D3, acts within domains involving nuclear receptor-mediated signaling. Its active metabolite, calcitriol, binds to the Vitamin D Receptor (VDR), forming a complex that functions as a transcription factor. This engagement modifies early molecular steps by regulating the transcription of genes, such as those encoding calcium transport proteins (e.g., TRPV6 and calbindin) in the intestine, leading to enhanced intestinal calcium absorption, a pathway consequence that affects systemic calcium pool regulation.


Regulation of Skeletal Mineral Homeostasis

The drug affects processes driven by distinct signaling patterns within the bone and kidneys, influencing calcium and phosphate homeostasis. The active Vitamin D metabolite helps modulate the mobilization of calcium and phosphate from bone and promotes their reabsorption in the renal tubules. This complex mechanistic cascade influences feedback regulation within the parathyroid and renal pathways, ultimately modulating serum calcium and phosphorus concentrations.


Modulation of Cellular and Immune Mechanisms

Vitamin D3 engages mechanisms that regulate cellular processes beyond mineral metabolism. Its active form can modulate the action of cytokines and other mediators, affecting key pathways associated with cell turnover, differentiation, and the inflammatory response. This leads to physiological adjustments that include modulation of immune cell activity.

Dosage and Administration Information

How to Use Cavit-D3: Administration Guidelines

Cavit-D3 (a combination of calcium and colecalciferol/Vitamin D3) involves a specific administration protocol to ensure proper intake of its active components.


Administration Scope

Instruction Detail
Route of administration Oral Use is the primary route for all available forms, including chewable, film-coated, and effervescent dosage forms.
Dosing schedule The standard regimen is typically one tablet once daily (e.g., 1000 mg Calcium/880 IU Vitamin D3) or one tablet twice daily for lower-strength formulations to achieve the required daily dose.
Timing in relation to meals Administration may be with or without food, although taking it with a main meal is a common approach.
Preparation requirements Chewable tablets must be fully chewed before swallowing. Effervescent tablets must be dissolved completely in water and the solution drunk immediately.
Age-group administration Standard adult dosage applies to the elderly, but long-term therapy involves periodic monitoring of serum calcium and renal function. Use is contraindicated in cases of severe renal impairment.
Missed-dose rules If a dose is missed, the next dose should be taken at the usual time; the dose should not be doubled to compensate.

Special Procedural Conditions

Classification Detail
Co-Administration Constraint A two-to-four-hour time separation from other specific medicines, such as certain antibiotics (e.g., tetracyclines) and levothyroxine, is maintained to prevent reduced absorption of those co-administered agents.
Course Duration The product is intended for long-term use for deficiency correction and management. The necessity for continuation is typically re-evaluated periodically by a clinician.

These administration guidelines define the parameters for correct oral intake, specifying the daily dose to be achieved and detailing procedural steps like chewing or dissolving the tablet. They also include time separation from specific co-administered drugs and involve periodic monitoring during long-term use.

Recent Clinical Evidence

Research evidence / Overview of studies for Cavit-D3

Evidence for Use in Addressing Calcium and Vitamin D Deficiency

Study Context and Findings

Research examined Cavit-D3 in the context of conditions involving periods of heightened symptoms and focused on outcomes related to systemic or functional imbalance. The goal of this research was observed in trials exploring short-term symptom changes over defined intervals. The data show patterns related to changes in specific systemic markers monitoring physiological strain or stress. Evidence suggests that using Cavit-D3 may be associated with temporary changes in markers related to systemic or functional imbalance. This contributes to the broader evidence landscape by detailing short-term changes that were measured.

It is important to note that findings were mixed across different studies, and the evidence quality varies across studies. Data for certain groups remain insufficient. Overall, research is ongoing to better understand these mechanisms, and subgroup findings are uncertain. Study results reflect the specific conditions under which they were conducted.

Evidence for Use as an Adjunctive Treatment for Osteoporosis and Related Conditions

Study Context and Findings

Research exploring Cavit-D3 was studied for its potential relationship with outcomes related to physical discomfort and outcomes reflecting daily functioning or activity level. The studies monitored changes over defined time intervals to see how these outcomes evolved in the observed populations. The findings describe patterns observed in the studies, where the use of Cavit-D3 was associated with changes in measured bone health markers. The research highlights changes measured during the study period in patient-reported outcomes describing perceived discomfort. The research describes how patient-reported experiences were measured during the study.

However, the evidence is limited for very long-term outcomes, as follow-up durations were limited in many of the initial trials. Sample sizes were modest in some subgroup analyses, and results apply only to the populations studied. Therefore, certainty remains low regarding the long-term maintenance of the observed patterns. Research provides context but not individual predictions.

Key Studies & References

  1. Clinical Practice Guidelines for the Prevention and Treatment of Osteoporosis

Frequently Asked Questions (FAQ)

Common questions about Cavit-D3 (FAQ)


Q: What's the difference between Cavit-D3 and regular calcium pills?

A: Cavit-D3 is officially described as a combination product. It contains calcium for bone structure, but it also includes colecalciferol (Vitamin D3). The Vitamin D3 component is key because official sources recognize it as essential for helping your body properly absorb and use the calcium that is provided.


Q: What are the most commonly reported side effects when starting Cavit-D3?

A: Official product information notes that gastrointestinal issues like constipation, flatulence, nausea, abdominal pain, and diarrhoea are documented adverse reactions. These effects are listed with a frequency of 'Not Known' in official labels. Less common, officially documented effects include elevated calcium levels in the blood (Hypercalcaemia).


Q: Does taking certain antacids affect how Cavit-D3 works?

A: Regulatory warnings state that some magnesium-containing antacids may elevate blood magnesium levels (hypermagnesemia) when combined with the Vitamin D component of Cavit-D3, particularly in patients with kidney concerns. Official documentation notes that discussions with a healthcare provider may be necessary before combining certain antacids with this medicine.


Q: What are official documents saying about Cavit-D3 and pregnancy?

A: Official documents state that high-dose formulations of Cavit-D3 are strictly contraindicated (prohibited) during pregnancy. Lower-dose products may be described for use if a medical need for deficiency correction is present. Regulatory bodies specifically warn that elevated dosing during pregnancy must be strictly avoided due to documented risks to the developing fetus.


Q: Why is my doctor checking my blood levels while I am on Cavit-D3?

A: Official documents require the periodic monitoring of serum and urinary calcium levels during long-term use. This monitoring is required in official documents to identify and manage the documented risk of elevated calcium levels in the blood (hypercalcaemia) or in the urine (hypercalciuria).


Q: What is the basic mechanism described for how Cavit-D3 affects the body?

A: The official mechanism involves two main actions: the product provides calcium to support bone structure, and the Vitamin D3 component helps the body effectively absorb that calcium from the intestines. This process helps to regulate the overall levels of calcium and phosphate in the blood.


Q: What is Cavit-D3 used for besides supporting bone health?

A: While the primary purpose is supporting bone health, the official mechanism of action for Vitamin D3 indicates it is involved in regulating certain cellular processes. It is also described in official documents as having a role in modulating immune cell activity within the body.


Q: Does Cavit-D3 need to be taken long-term for bone strength?

A: Regulatory documents state that the product is intended for long-term use for the management and correction of calcium and Vitamin D deficiencies. Official guidance requires that the necessity for continuation be re-evaluated periodically by a clinician.


Q: Are there food restrictions I need to know about while using Cavit-D3?

A: Official documents warn that foods high in oxalic acid (like spinach) or phytic acid (found in bran and whole cereals) can decrease the body's absorption of calcium. Official documents note that a time separation from these types of food may be necessary.


Q: Has Cavit-D3 been studied in clinical trials?

A: The regulatory-published data supporting the medicine’s use is based on studies and findings that evaluated its relationship with bone health outcomes and changes in systemic markers. These findings describe patterns measured over defined intervals in the populations studied.


Q: Is Cavit-D3 commonly prescribed for men as well as women?

A: The official indications for the medicine relate to deficiency states and osteoporosis in various populations, including both men and women. Official documents specifically address older adults of both genders for deficiency correction.


Q: Can people who are lactose intolerant safely take Cavit-D3?

A: Official product labeling for certain formulations of Cavit-D3 lists lactose or sucrose as inactive ingredients (excipients). Official documents indicate that patients with rare hereditary problems, such as galactose intolerance, are generally not eligible to use formulations that contain these specific substances.


Q: Why do some people experience mild constipation with Cavit-D3?

A: Constipation is a documented adverse reaction, though official patient labeling does not state the specific reason. The calcium component can cause changes in digestion. Constipation is also documented as an early sign of elevated Vitamin D levels (Vitamin D intoxication) in certain official documents.


Q: Is Cavit-D3 prescribed for people with low calcium levels?

A: Official indications for the medicine include the correction of calcium deficiency and Vitamin D deficiency. Products with similar components are also sometimes used under medical guidance to manage conditions like hypoparathyroidism, which is associated with low blood calcium levels.


Q: If I'm allergic to certain ingredients, how do I check if Cavit-D3 is safe?

A: Official documents state that the medicine is contraindicated if you have a known hypersensitivity (severe allergy) to the active substances or excipients (inactive ingredients). Official guidance suggests that patients with known allergies may need to review the full list of ingredients (active and inactive) found in the product's official leaflet or drug label.


Q: What kind of research has looked at the long-term use of Cavit-D3?

A: Official research summaries note that initial trials often had limited follow-up durations. The studies that exist detail findings measured over defined time intervals, examining bone health markers. The necessity for continuation is officially re-evaluated periodically by a healthcare professional.


Q: Do regulatory agencies classify Cavit-D3 as a high-risk medication?

A: Regulatory documents classify Cavit-D3 as a Nutritional Supplement or a Vitamin D/Calcium combination product. While this classification is generally low-risk, the product does carry specific official warnings and contraindications for high-risk patient groups, such as those with severe kidney issues.


Q: Is it normal to feel a bit nauseous when first starting Cavit-D3?

A: Nausea is a documented adverse reaction, listed with a frequency of 'Not Known' in official documents. Additionally, it is listed as an early symptom of potential elevated Vitamin D levels in official labeling. Due to this possibility, any onset of nausea may require assessment by a healthcare provider.


Q: What should I know about Cavit-D3 and sunlight exposure?

A: Official information explains that sunlight naturally causes your body to make Vitamin D3. Warnings focus on the risk of having too much Vitamin D (hypervitaminosis D). Official guidance notes that the Vitamin D in the medicine contributes to the overall Vitamin D status, suggesting that all sources, including sunlight exposure, may need to be considered.


Q: Can people with digestive absorption issues still benefit from Cavit-D3?

A: Official information explicitly contraindicates (prohibits) the use of the drug in patients with severe malabsorption syndrome. Since the core function relies on intestinal absorption, official documents state that impaired absorption, such as in malabsorption syndrome, is a contraindication for its use.


Q: What is the maximum duration of use discussed in official prescribing information for Cavit-D3?

A: Official prescribing information does not state a specific maximum duration of use for this medicine. It is described as being intended for long-term use to manage deficiencies, but continuation is officially required to be re-evaluated periodically by a clinician.


Q: Are headaches a known, common side effect of Cavit-D3?

A: Headache is not listed among the common (uncommon or rare) adverse reactions in official regulatory documents. However, headache is officially listed as an early sign of elevated Vitamin D levels (Vitamin D intoxication) in some product labels, which may require assessment by a healthcare provider.

How should Cavit-D3 be stored and disposed of?

How to Store and Dispose of Cavit-D3?

The official storage conditions for Cavit-D3, a combination of Calcium and Vitamin D3 (Colecalciferol), are defined by regulatory labeling to maintain the product's stability, particularly for the moisture- and light-sensitive Vitamin D3 component.


Storage and Handling Requirements

Requirement Domain Official Guidance
Temperature Control Store the product below 30 C or 25 C, depending on the specific formulation label.
Environmental Protection Store in the original container and keep it tightly closed to protect the contents from light and moisture.
Child Safety The medicine must be kept out of the sight and reach of children.

Disposal Instructions

Regulatory documents state that any unused or expired product must be disposed of in accordance with local requirements. It is officially advised not to dispose of medicines via wastewater or household waste to protect the environment.

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

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