Acical D

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Acical D

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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 Acical D

Quick Facts

Property Description
Active Ingredients Calcium Carbonate, Colecalciferol (Vitamin D3)
Form Oral solid dosage form (typically a tablet)
Pharmacological Class Mineral and Vitamin Supplement, Antihypocalcemic Agent
Common Use Supplementation for mineral balance and bone health
Origin Semi-synthetic/Derived

Classification and Composition

Acical D is a fixed-dose combination pharmaceutical preparation classified as a Mineral and Vitamin Supplement and an Antihypocalcemic Agent. It is primarily positioned for adult patients and the elderly requiring comprehensive nutritional support for bone structure. This preparation is typically available as an oral solid dosage form, designed for oral administration. The active components are Calcium Carbonate and Colecalciferol (Vitamin D3). The fundamental purpose of this formulation is to address deficiency state associated with inadequate intake or absorption of both calcium and Vitamin D, which are critical for metabolic processes.

Why is Acical D a Fixed-Dose Combination?

Acical D combines two active substances because the body requires Colecalciferol (Vitamin D3) to efficiently utilize the Calcium Carbonate it receives. The combination ensures that the mineral is delivered along with the essential regulator that controls its uptake. This specific combination is widely used in supplementation therapy and is clinically recognized for its role in supporting the dual requirements of bone metabolism.

Unlike monocomponent calcium preparations, this fixed-dose combination addresses a dual nutritional requirement crucial for skeletal integrity. Vitamin D3 significantly enhances intestinal calcium absorption, thereby ensuring the supplied mineral is bioavailable for processes like bone mineralization and calcium homeostasis regulation.

General Purpose: Maintaining Mineral Balance

The general purpose of Acical D is to support long-term bone health maintenance by aiding in the regulation of the body's mineral balance. A typical neutral use scenario involves older adults prescribed this supplement as part of a strategy to prevent chronic calcium deficiency and loss of bone mass. The combined physiological action ensures that sufficient calcium is available to meet the body's systemic demands for bone strength and muscle function, making it an essential component of supplementation therapy.

Regulatory References

  1. MedlinePlus Drug Information

What side effects are possible with Acical D?

Possible Side Effects and Safety Information

The safety profile of Acical D (a combination of Calcium Carbonate and Cholecalciferol/Vitamin D3) is primarily defined by the risks associated with calcium regulation in the body.

Adverse Reactions by Frequency

Adverse reactions are classified based on frequency as documented in official regulatory sources. The most significant risks involve metabolic disturbances:

  • Uncommon (Affects 1 to 10 users in 1,000): High calcium levels in the blood (Hypercalcaemia) and high calcium levels in the urine (Hypercalciuria).
  • Rare (Affects 1 to 10 users in 10,000): Gastrointestinal effects such as constipation, flatulence, nausea, abdominal pain, and diarrhoea. Skin reactions like pruritus (itching), rash, and urticaria (hives) are also rare.
  • Very Rare (Affects less than 1 user in 10,000): Milk-alkali syndrome (a severe form of overdose) and dyspepsia.
  • Not Known: Severe hypersensitivity reactions (allergic reactions), including angioedema (swelling of the face or throat).

Serious Safety Considerations and Restrictions

Serious Adverse Reactions officially documented include severe, sustained Hypercalcaemia, which can lead to complications such as kidney damage, and the serious overdose condition, Milk-Alkali Syndrome.

Safety-Related Restrictions: Acical D must not be used if you have severe kidney failure, pre-existing high calcium levels (Hypercalcaemia), or an allergy to the active ingredients or excipients. Patients with kidney impairment or a history of kidney stones require careful supervision and periodic monitoring of blood and urinary calcium levels during long-term use, as explicitly defined by regulatory agencies.

Overdose and Emergency Response

Overdose and When to Seek Help: Official Regulatory Information

Overdose involving the combination of Calcium Carbonate and Colecalciferol (Vitamin D3) is principally characterized by Hypercalcaemia, which represents the core metabolic disturbance documented in regulatory sources.

Documented Overdose Manifestations

Classification Manifestations and Outcomes (as documented in labels)
Symptom Cluster Anorexia, Nausea, Vomiting, Constipation, Abdominal pain, Muscle weakness, Polydipsia (excessive thirst), and Polyuria (excessive urination).
Severe Outcomes Impaired renal function, Nephrocalcinosis, soft tissue calcification, and risk of Cardiac arrhythmias in severe cases.

Required Emergency Actions

Official regulatory guidance mandates that users seek immediate medical attention or contact emergency services upon any suspicion of overdose or if the above symptoms occur. The primary first action is to discontinue treatment immediately.

Management is defined as symptomatic and supportive treatment, as no specific antidote is known for this combination. Procedural steps include necessary rehydration and close monitoring of serum calcium and renal function. Regulatory documents note that patients with chronic renal impairment have an increased susceptibility to overdose severity.

Therapeutic Uses of Acical D

What Acical D Treats: Main Uses and Benefits

This class of medication is commonly used across therapeutic domains where short-term symptom management is appropriate. This class of medication is relevant in contexts marked by increased discomfort or tension, applied across domains where additional symptomatic support is needed.

The main therapeutic areas of use involve addressing symptoms related to systemic imbalance, such as deficiency states, and supporting management of conditions where functional stability becomes affected. This medication is applied in scenarios where additional management of discomfort is required. It may assist with reducing symptoms that create noticeable functional strain and contributes to easing the overall symptom load during periods of symptomatic burden. It is often used during phases when symptoms become more noticeable.

“This approach supports the patient during difficult episodes and helps maintain a sense of stability when symptoms become more noticeable due to physiological imbalance.”

Quick Fact: Support for Symptom Patterns

This medication provides support that helps ease the overall symptom burden when symptoms interfere with routine activities and may assist with coping more steadily during symptomatic phases.

Eligibility and Restrictions for Use

Who can and cannot use Acical D? (Official Regulatory Information)

Official regulatory documents define the eligibility for Acical D (Calcium Carbonate and Colecalciferol) based on specific patient health statuses and age groups, ensuring proper calcium and vitamin D utilization.

Eligibility Scope Status / Restrictions (As per Label)
Populations for whom use is allowed Adults and the Elderly; patients with documented deficiencies.
Populations for whom use is not recommended Children and Adolescents (generally under 12 years of age).
Populations for whom use is contraindicated Patients with Hypercalcaemia, Hypercalciuria, Hypervitaminosis D, or Nephrolithiasis (kidney stones).
Age-related eligibility rules Use is established for Adults and the Elderly. Use in the pediatric population is usually not recommended or contraindicated depending on formulation strength.
Condition-specific eligibility rules Severe Renal Impairment is an absolute contraindication. Mild to moderate impairment requires careful supervision and monitoring. Hepatic Impairment typically does not require dose adjustment.
Pregnancy and Lactation Eligibility Conditional Use; permitted only for documented deficiency and strictly under the direction of a physician.

Eligibility-related restrictions: Use requires caution and mandatory monitoring in patients with Sarcoidosis or those who are immobilized with osteoporosis. The medicine is also strictly contraindicated for anyone with a known hypersensitivity to the active ingredients or excipients.

Connection to the overall eligibility profile: Regulatory information restricts Acical D use primarily to safeguard against excessive calcium levels and compromised kidney function. Absolute contraindications specifically target patients whose existing metabolic or renal status is incompatible with the medicine’s components, while conditional use applies to vulnerable groups requiring close medical oversight.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Acical D (Calcium and Vitamin D) can affect how other medications are absorbed and processed by the body. These interactions are primarily structured around the calcium component acting as a polyvalent cation and the potential for hypercalcemia from the Vitamin D component.

Significant Interaction Categories

Interacting Product Category Practical Implication
Tetracycline & Quinolone Antibiotics Absorption is significantly reduced. Doses must be separated by several hours (e.g., 2 to 6 hours) to maintain antibiotic effectiveness.
Levothyroxine & Bisphosphonates Reduced absorption of these medicines. Administration must be separated from Acical D by a minimum of 4 hours.
Digitalis Glycosides (e.g., Digoxin) Increased risk of serious cardiac toxicity (arrhythmias) if hypercalcemia develops. Close patient and serum calcium monitoring is required.
Thiazide Diuretics & other Vitamin D Increased risk of developing hypercalcemia. Serum calcium levels must be monitored regularly.

Contextual Constraints

The presence of calcium can limit the uptake of many oral medicines via a chelation effect in the digestive tract. Conversely, the co-administration of other calcium or Vitamin D metabolites, such as Calcitriol or Alfacalcidol, is officially restricted due to the high and potentially dangerous risk of hypercalcemia.

Mechanism of Action

Acical D, a combination product, contains calcium carbonate and cholecalciferol (Vitamin D3), each exhibiting distinct molecular and systemic actions.

Calcium carbonate dissociates into calcium ions (Ca^2+) in the gastrointestinal tract. A portion of these ions is absorbed in the small intestine via both paracellular passive diffusion and transcellular active transport. Ca^2+ enters the systemic circulation, where it modulates numerous physiological processes, including neuromuscular signaling, cellular transduction cascades, and blood coagulation. Ca^2+ also serves as a critical structural component, incorporating into the crystalline hydroxyapatite matrix of osseous tissue.

Cholecalciferol is a prohormone metabolized primarily in the liver to 25-hydroxycholecalciferol and subsequently in the kidney to the biologically active form, calcitriol (1,25-dihydroxycholecalciferol). Calcitriol is an agonist that binds to the intracellular Vitamin D Receptor (VDR), a nuclear transcription factor. This ligand-receptor complex heterodimerizes with the Retinoic X Receptor (RXR) and binds to Vitamin D Responsive Elements (VDREs) on target gene promoters. This genomic pathway upregulates the transcription of transport proteins like TRPV6 and calbindin-9k in intestinal enterocytes, thereby increasing the active transcellular absorption of Ca^2+ and phosphate from the intestinal lumen. Systemically, calcitriol, in concert with parathyroid hormone (PTH), modulates calcium and phosphate mobilization from bone and reabsorption in the renal tubules, ultimately acting on the system-level homeostatic regulation of serum calcium and phosphate concentrations.

Dosage and Administration Information

Instruction Map: How to use Acical D — Official Administration Guidelines

This map formalizes the high-level administration principles for Acical D (Calcium Carbonate and Colecalciferol).


Administration Scope

Field Content
Route of administration Oral (ingested via mouth)
Dosing schedule Standard regimens typically deliver a daily total of 1000 mg elemental calcium and 800 IU Vitamin D3, often achieved through a divided twice-daily dose.
Timing in relation to meals (if applicable) Administration should be with or immediately after food to aid the absorption of the calcium carbonate component.
Preparation requirements (if applicable) Chewable forms must be chewed or sucked; effervescent tablets must be fully dissolved in water before ingestion.
Age-group administration rules The standard dosage is for Adults and the Elderly. The preparation is generally not intended for use in children under 12 years of age.
Missed-dose rules If a dose is missed, it should be taken as soon as remembered, but the patient must skip the missed dose if it is almost time for the next scheduled dose. Do not take a double dose.
Special procedural conditions The total daily calcium intake must be separated by at least two hours from certain other oral medications. Intake must also be separated from foods high in oxalic or phytic acid.

Instruction Classifications (High-Level)

Classification Content
Administration method type Oral
Frequency pattern Daily (typically in divided doses).
Use-context constraints Administration is constrained by meal timing, the physical preparation of the dose form, and strict protocol for missed doses.

Resulting Procedural Structure

Official step sequence:

  • The correct dosage form is administered orally and either swallowed, chewed, or dissolved based on the specific preparation.
  • Intake is synchronized with or immediately after a meal to optimize the processing of the mineral component.
  • The patient maintains a continuous, long-term supplementation pattern, following the mandated rule to never double a dose.

Connection to the overall use protocol The labeled instructions define the standardized use through the oral route and a consistent, often twice-daily frequency. This structure establishes a clear pattern tied to meal intake and explicitly addresses common scheduling concerns, ensuring the prescribed regimen is followed accurately over a long duration.

Recent Clinical Evidence

Research evidence / Overview of Studies for Acical D

Evidence for Correcting Calcium and Vitamin D Deficiency

The combination of Calcium Carbonate and Colecalciferol (Acical D) was evaluated in research exploring nutritional deficiencies, particularly in adults with insufficient nutrient intake. Research includes Randomized Controlled Trials (RCTs) and evidence acknowledging the medicine's well-established medicinal use. These studies monitored specific biological markers, such as serum 25-hydroxyvitamin D [25(OH)D] levels and serum calcium levels, which reflect nutrient status.

Research highlights changes measured during the study period in these biomarkers. For example, studies report how low Vitamin D levels and calcium homeostasis evolved in the observed populations following administration. The research contributes to understanding symptom patterns related to nutrient balance. However, the existing deficiency studies are often short-term to intermediate in length, and long-term effects are not fully established regarding sustained functional outcomes beyond the correction of a deficiency state.


Evidence as Supportive Therapy for Osteoporosis and Fracture Risk

The combination was evaluated in a second context: as a supportive treatment alongside prescription medicines for osteoporosis (weakened bones). This research typically involves large-scale, long-term RCTs that observed participants over several years. These studies explored whether providing the combination to at-risk older adults was associated with differences in the rate of skeletal events, such as hip fractures or total non-vertebral fractures.

Findings indicate that the combination was observed in some studies to be associated with a lower incidence of total fractures when given to specific high-risk groups, such as older adults living in institutional settings. However, findings were mixed when the combination was evaluated in healthy, community-dwelling older adults. In these groups, the outcomes may not be as consistently observed in the research. Additionally, studies reported that changes in Bone Mineral Density (BMD) measurements were generally small.


Key Limitations and Areas of Research Uncertainty

One major limitation is the variability of findings, particularly between studies involving high-risk, institutionalized older adults and those involving healthier, community-dwelling populations. This means certainty remains low regarding the universal application of fracture prevention findings. Additionally, comparative evidence is lacking regarding whether the fixed-dose combination provides a difference in study outcomes over the use of separate calcium and Vitamin D supplements. Long-term effects are not fully established for certain outcomes such as long-term functional status and muscle strength in many adult subgroups. Studies help show what has been observed so far, but research does not determine whether an individual will respond similarly.

Frequently Asked Questions (FAQ)

Common questions about Acical D (FAQ)


Q: Can I take Acical D at the same time as my antibiotic?

Official regulatory documents indicate that Acical D should not be taken at the same time as certain antibiotics, such as those in the tetracycline or quinolone classes. The calcium in the supplement can interact in the digestive tract, potentially reducing the antibiotic's effectiveness. Regulatory labeling generally specifies that the administration of the doses should be separated by a minimum of two to six hours to minimize this interaction.


Q: What does IU stand for when referring to Vitamin D3?

When referring to Vitamin D3 (Colecalciferol) and other vitamins, IU stands for International Unit. This is a standardized measure used by health authorities to describe the activity or potency of the vitamin. Using International Units helps ensure that the measurement of a vitamin's effect is consistent and reliable across different product labels.


Q: Will Acical D affect my ability to drive or operate machinery?

Regulatory safety documents review whether a medicine is likely to impair the ability to drive or use machines. The official product information for Acical D generally does not include a specific warning or caution regarding driving or operating machinery. In the absence of commonly reported side effects that affect the central nervous system, such as dizziness or drowsiness, a formal warning may not be required on the regulatory label.


Q: What food should I avoid while taking Acical D?

Official guidelines advise that the administration of Acical D should be separated from certain foods. Regulatory documents specify that intake should be separated from foods that are high in oxalic acid (found in spinach and rhubarb) and phytic acid (found in whole grains and legumes). These compounds can bind to calcium in the stomach, which may reduce the amount of calcium the body absorbs.


Q: Does Acical D need a prescription?

The regulatory status of calcium and Vitamin D supplements like Acical D can vary widely. While many standard-strength calcium and Vitamin D products are widely available Over-the-Counter (OTC), some higher-dose or specialized fixed-dose formulations may be categorized to require a prescription (Rx). The specific legal requirement is dependent on the exact strength, local regulations, and the product's classification.

How should Acical D be stored and disposed of?

Storage and Disposal of Acical D

The storage and disposal instructions for Acical D (Calcium Carbonate and Colecalciferol) are governed by official regulatory guidelines to maintain product quality and safety.

Official Storage Conditions

Acical D must be stored at a temperature that does not exceed 25 C and must be kept in a dry place. It is essential to protect the tablets from moisture and excessive heat to preserve the product's 18-month shelf-life. The product must remain in its original container and be stored out of the sight and reach of children to prevent accidental exposure.

Disposal Requirements

Unused or expired Acical D must be disposed of safely. Users should consult local regulations or utilize a medication take-back program where available, as required by regulatory authorities for the final handling of medicinal products.

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

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