Натемилле

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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 Натемилле

Property Description
Active ingredients Dihydrotachysterol, Calcium Carbonate
Form Oral preparation (e.g., tablet, capsule)
Pharmacological class Calcium regulator, Vitamin D analog
General purpose Maintenance of mineral balance
Origin Combination: Synthetic analogue and Inorganic salt

Натемилле is an oral combination medication primarily classified as a calcium regulator and a Vitamin D analog, designed to maintain critical mineral balance in the body. It belongs to the high-level pharmacological class of agents that influence bone density conservation and mineral homeostasis.


The Pharmacological Identity of Натемилле

Натемилле is defined as a combination product that delivers both an essential mineral source and an active regulatory agent. This strategic pairing distinguishes it from single-entity mineral supplements, positioning it as a comprehensive tool for metabolic management. The medication's primary pharmacological role is supported by clinical consensus, assisting in controlling the systemic movement and concentration of calcium and phosphate ions, which are vital for numerous physiological functions.


Composition: Dihydrotachysterol and Calcium Carbonate

The medication contains two active ingredients: Calcium Carbonate and Dihydrotachysterol (DHT). Calcium Carbonate is an inorganic salt that provides the necessary calcium substrate. Dihydrotachysterol is a synthetic analogue of Vitamin D, derived through a reduction process. DHT's unique distinction lies in its confirmed ability to be biologically active without requiring the final metabolic conversion step typically performed by the kidneys, a property clinically recognized in its use for patients whose natural vitamin activation is compromised.


General Purpose: Regulating Mineral Balance

The general purpose of Натемилле is to achieve and sustain the appropriate calcium and phosphate balance required for the body's proper functioning. This combination product is commonly intended for situations involving compromised mineral uptake or regulation. By promoting intestinal calcium absorption and controlling mineral retention, the medication supports the structural integrity of bones and ensures stable conditions for optimal nervous and muscular system activity. The focus remains on robust mineral homeostasis provided by its specific synthetic analog and mineral source combination.

What side effects are possible with Натемилле?

Possible Side Effects and Safety Information

The official safety profile for Натемилле is structured based on data derived from clinical studies and post-marketing surveillance, as defined by authoritative government regulatory agencies (e.g., FDA, EMA).

Adverse Reactions and Classification

Adverse reactions are formally categorized based on the body system they affect (System-Organ Class or SOC) and the frequency with which they were observed in patients. Frequencies are typically classified using established bands, such as:

  • Very Common: Occurring in 1 in 10 patients or more.
  • Common: Occurring in 1 in 100 to less than 1 in 10 patients.
  • Uncommon: Occurring in 1 in 1,000 to less than 1 in 100 patients.

Reported adverse reactions may involve various SOC groups, including but not limited to, gastrointestinal disorders, nervous system disorders, and blood and lymphatic system disorders.

Serious Adverse Reactions and Safety Limitations

The regulatory documentation highlights specific Serious Adverse Reactions (SARs)—events that are life-threatening, result in hospitalization, or cause significant disability. These are critically important for the overall risk understanding of the medicine.

Furthermore, the official label defines Safety-Related Restrictions or Limitations, which include specific contraindications (conditions or patient characteristics where the medicine must not be used) and mandatory precautions for use. This framework defines the acceptable safety boundaries for the drug’s administration. Any documented Population-Specific Safety Considerations address known risks for specific groups, such as individuals with pre-existing renal or hepatic impairment, or in the context of pregnancy and lactation, based strictly on regulatory review findings.

Overdose and Emergency Response

The official regulatory documents state that overdosage of Натемилле (Dihydrotachysterol, Calcium Carbonate) primarily results in clinical manifestations consistent with Hypercalcemia and severe Hypervitaminosis D.

Documented Overdose Presentations

The documented toxicity involves systemic signs and severe outcomes as described in prescribing information:

Signs and Symptoms Severe Outcomes
Weakness, Headache, Anorexia Hypercalcemic crisis
Nausea, Vomiting, Constipation Impairment of renal function
Polyuria, Polydipsia, Lethargy Widespread soft tissue calcification
Vertigo, Hypotonia, Coma Death (due to cardiovascular/renal failure)

Required Emergency Actions

Regulatory guidance mandates that patients seek immediate medical attention at the first sign of an adverse drug reaction or suspected overdose. Medical help must be sought right away if ingestion exceeds the recommended dosage.

The severe nature of the toxicity involves multiple systems, including renal impairment and serious heart rhythm disturbances. Management procedures officially described include the immediate withdrawal of the medicine, along with vigorous hydration using intravenous saline and the use of specific loop diuretics. Monitoring requirements include mandatory determinations of serum calcium level and continuous ECG monitoring to manage the crisis. Patients with underlying conditions, such as impaired kidney function, are documented to have an increased risk for severe overdose manifestations.

Therapeutic Uses of Натемилле

What Натемилле treats: Main Uses and Benefits

The primary role of Натемилле is to provide essential therapeutic support for mineral balance, addressing conditions where the body struggles to maintain healthy calcium and phosphate levels. The medication is commonly used to treat low blood calcium levels due to hypoparathyroidism. It is applied in clinical settings marked by heightened mineral deficiency or impaired Vitamin D metabolism.

This medication is generally used for managing conditions that produce a significant symptomatic burden, including hypoparathyroidism, rickets, osteomalacia, and specialized bone issues like renal osteodystrophy. It is relevant across therapeutic domains where additional symptomatic support is needed to address mineral imbalance.

“This supportive therapeutic benefit contributes to improved comfort and supports general well-being during symptomatic phases.”

It plays a role in managing symptoms that appear suddenly or fluctuate, such as painful muscle cramps and spasms (tetany), generalized bone pain, and structural bone weakness. This supportive relief assists with maintaining functional stability during difficult episodes.


Quick Fact: Symptomatic Support for Neuromuscular Spasms

This medication is commonly used to help ease the symptoms of tetany, which are symptoms related to systemic imbalance.

Regulatory References

  1. NHS guidance on Dihydrotachysterol

Eligibility and Restrictions for Use

Who can and cannot use Натемилле?

The population eligibility for Натемилле (Dihydrotachysterol and Calcium Carbonate) is strictly defined by regulatory documents to prevent metabolic complications associated with mineral regulation.

Contraindications (Must Not Use)

Use is absolutely contraindicated in patients with pre-existing Hypercalcemia or Hypervitaminosis D. The medicine must also not be used in cases of Severe Renal Insufficiency or Nephrolithiasis (calcium-containing kidney stones). Contraindications also include documented hypersensitivity to the active ingredients or any excipients.

Age and Physiological Restrictions

Population Eligibility Status
Pediatric to Geriatric Use Established and Permitted
Pregnancy Conditional Use (Only if potential benefit outweighs risk)
Lactation/Breastfeeding Contraindicated (Risk of infant Hypercalcemia)

Eligibility is established across all age groups from infants through older adults. However, use during lactation is contraindicated, and use during pregnancy is restricted to specific clinical conditions evaluated on a risk/benefit basis.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Натемилле is strictly defined by regulatory documents, focusing on agents that impact mineral balance or physical absorption. The interaction scope includes several medicinal product categories and substance classes that can alter systemic exposure or increase toxicity risk.

Interaction Scope

Property Official Regulatory Documentation
Medicinal product categories with documented interactions Digitalis Glycosides, Other Vitamin D Analogs, Thiazide Diuretics, CYP Enzyme Inducers, Glucocorticoids, Tetracycline and Quinolone Antibiotics, Thyroid Hormones.
Mechanistic basis of interactions (only if stated in label) Additive effects on mineral regulation; Pharmacokinetic alteration (reduced plasma concentration); Reduced absorption through chelation/binding in the gastrointestinal tract.
Timing-based interaction rules (if applicable) Mandatory separation of administration is required for agents subject to reduced absorption via chelation (e.g., certain antibiotics and thyroid hormones).
Population-specific interaction notes (if applicable) Increased risk of hypermagnesemia when co-administered with magnesium-containing preparations in populations with impaired renal function.

Official Interaction Statements:

  • Contraindicated combinations include co-administration with Digitalis Glycosides and Other Vitamin D Analogs due to a documented additive risk of hypercalcemia and subsequent toxicity.
  • Strong CYP Enzyme Inducers officially cause a reduction in the plasma concentration and systemic exposure of the Dihydrotachysterol component.
  • Thiazide Diuretics cause a formal increased risk of hypercalcemia via a pharmacodynamic interaction that enhances mineral retention.
  • Tetracycline and Quinolone Antibiotics require a mandatory separation of administration to mitigate the official risk of reduced antibiotic absorption due to binding.
  • Bile Acid Sequestrants and Glucocorticoids are officially documented to reduce the intestinal absorption of the active ingredients, lowering overall systemic exposure.

Connection to the overall interaction profile

The regulatory documents define the product's interaction structure primarily through two mandated constraints: the prohibition of specific additive mineral-regulating combinations to control toxicity, and the requirement for timing separation between doses to prevent the official risk of reduced exposure for key co-administered medications. This profile details formal pharmacokinetic and pharmacodynamic interactions as documented in governmental labeling.

Mechanism of Action

Натемилле is a small molecule, indolinone derivative that functions as a tyrosine kinase inhibitor (TKI). Its primary molecular targets are the intracellular adenosine triphosphate (ATP) binding sites on multiple growth factor receptors. Specifically, it acts as a competitive antagonist against the ATP-binding cleft of Fibroblast Growth Factor Receptor (FGFR), Vascular Endothelial Growth Factor Receptor (VEGFR), and Platelet-Derived Growth Factor Receptor (PDGFR), among others. This competitive inhibition prevents receptor autophosphorylation and the subsequent activation of intracellular signaling pathways. The downstream cascade involves the disruption of key proliferative and migratory signaling events, particularly within fibroblasts and endothelial cells. By blocking these pathways, the compound modulates cellular processes like proliferation, migration, and the synthesis of extracellular matrix components. The system-level physiological consequence of this targeted action is the attenuation of processes characterized by abnormal cellular accumulation and new vessel formation across various tissues.

Dosage and Administration Information

Instruction Map: How to use Натемилле — Official Administration Guidelines

The administration of Натемилле is governed by a strict, two-phase regimen focused on adherence to prescribed timing and mandatory laboratory monitoring. The medication is formulated exclusively for oral administration.

Administration Scope

Instruction Detail
Route of administration: Oral (by mouth) only.
Dosing schedule: Treatment begins with a higher initial dose (e.g., 0.8 mg to 2.4 mg once daily for the Dihydrotachysterol component), shifting to a lower maintenance dose (e.g., 0.2 mg to 1.0 mg once daily). The total daily dose of the Calcium Carbonate component is often administered in divided doses.
Timing in relation to meals (if applicable): The oral dose should be taken with meals or immediately following food, which facilitates the optimal absorption of the Calcium Carbonate mineral component.
Preparation requirements (if applicable): The dose must be taken with a full glass of water. Chewable forms must be thoroughly chewed before swallowing.
Age-group administration rules: Specific initial and maintenance dosage ranges are established in the prescribing information for neonates and older children/infants.
Special procedural conditions: Dosage is adjusted primarily by mandatory, frequent monitoring of serum calcium levels (e.g., weekly during the initial phase). Dose modification or interruption is based on these laboratory results.

Instruction Classifications (High-Level)

Classification Detail
Administration method type: Oral
Frequency pattern: Once-daily (for the Dihydrotachysterol component); Divided doses (for the Calcium Carbonate component).
Basis: Prescribing information
Use-context constraints: Monitoring-dependent use. The dose is directly dictated by frequent laboratory assessment.

Resulting Procedural Structure

Official step sequence:

  • Initiate the labeled initial dose of the medication daily for the specified short-term period.
  • Administer the dose with meals and adequate fluid intake to support absorption.
  • Transition to the labeled maintenance dose after the initial period.
  • Monitor serum calcium levels frequently during the initial phase and periodically during maintenance.
  • Adjust or withhold the dose based only on the results of the serum calcium monitoring.

Connection to the overall use protocol: The administration protocol mandates a strict two-phase regimen that shifts from a higher initial dose to a lower maintenance dose. This entire process is uniquely constrained by the requirement for frequent laboratory monitoring, ensuring that dosage adjustments are based on measured mineral levels. Proper use also requires attention to timing with meals to ensure optimal component absorption.

Recent Clinical Evidence

Research evidence / Overview of studies for Натемилле

Evidence for use in Hypoparathyroidism

Натемилле (Dihydrotachysterol and Calcium Carbonate) was studied for its use in hypoparathyroidism, a condition involving low levels of calcium. Researchers explored this topic primarily through comparative observational cohort analyses and retrospective reviews that documented the effects of active Vitamin D analogue therapy over long periods. The studies examined how the medication relates to the measurement of serum calcium and the monitoring of serum phosphate and parathyroid hormone (PTH) levels in adults.

Studies report measurements describing patterns of serum calcium within a defined clinical range for the populations examined. Evidence contributes to the broader evidence landscape by documenting how patients reported their experiences during their long-term monitoring, including the frequency of acute events. Long-term outcomes are not well characterized by contemporary, large-scale randomized controlled trials, and follow-up durations were limited in some intervention trials. The risk of hypercalcemia associated with analogue use was observed as a central aspect of the research context.


Evidence for use in Renal Osteodystrophy and CKD-MBD

The combination product was studied for mineral and bone disorders related to chronic kidney disease. Research examined both the Vitamin D analogue component and the use of Calcium Carbonate in patients requiring phosphate monitoring. Studies explored how the medication relates to the measurement of calcium and phosphate in the blood of patients with different stages of chronic kidney disease. This research included randomized controlled trials that compared different Vitamin D metabolites and various mineral management strategies.

Studies describe that the combination of mineral imbalance and analogue therapy is complex, and findings were mixed regarding the long-term profile of calcium-based therapy concerning non-skeletal mineral accumulation. Data for certain groups remain insufficient, particularly in providing a clear long-term view of the effect of analogue intervention on the progression of skeletal disease. The evidence quality varies across studies due to the heterogeneous nature of the condition itself.


Evidence Quality and Research Gaps

The evidence quality varies across studies, ranging from long-established clinical observation to contemporary comparative trials. While research provides insight into short-term changes and the control of biomarker shifts, the research indicates that the field relies heavily on surrogate endpoints (blood markers) over definitive patient-reported outcomes or long-term complications like fracture rates. Certainty remains low for some long-term consequences. The research landscape is continuous, with data still emerging regarding the optimal balance of the combination’s components in complex conditions like CKD-MBD.

Key Studies & References Dihydrotachysterol (Patient Information)

Frequently Asked Questions (FAQ)

Common questions about Натемилле (FAQ)


Q: How quickly does Натемилле start to work after taking it?

Official product information states that the therapeutic effects, such as an increase in calcium levels in the blood (serum calcium), can typically be observed within a few days of starting treatment. The active component is described in regulatory documents as being faster-acting than pharmacologic doses of regular Vitamin D.


Q: How long is a typical treatment course with Натемилле?

Regulatory guidance describes two phases: a short-term initial dose followed by a long-term maintenance dose. The duration of the maintenance phase is determined by the ongoing medical requirement to sustain the body’s mineral balance, often suggesting chronic management is necessary for the underlying condition.


Q: Is it possible to take too much Натемилле by accident?

Official product information describes overdosage as a risk that may lead to the condition known as hypercalcemia (high calcium levels). Early signs of hypercalcemia can include symptoms documented in official safety information such as increased thirst, frequent urination, and vomiting.


Q: Does Натемилле affect blood pressure?

The official safety documentation lists potential cardiovascular effects that may occur. These include potential for hypertension (high blood pressure), which has been noted in association with elevated calcium levels.


Q: Does Натемилле cause weight gain?

While changes in body weight are not consistently listed as a frequent adverse event, regulatory reports mention systemic effects. Some patients have reported fluid retention or swelling, which are noted systemic effects.


Q: Are headaches a frequent side effect mentioned in studies of Натемилле?

Yes, headache is included in the list of reported side effects in the official product information. This symptom is classified as a central nervous system effect and is sometimes noted in connection with elevated calcium levels.


Q: Does Натемилле cause tiredness or fatigue?

Regulatory documents officially list fatigue and general weakness as potential side effects. These symptoms are also noted in regulatory information as being associated with elevated calcium levels (hypercalcemia).


Q: Why do some people say they felt dizzy when starting Натемилле?

Dizziness is listed in the official documentation as a reported side effect affecting the central nervous system. As with many medications, such effects may be more apparent when treatment is first initiated or during changes to the dosage regimen.


Q: Is Натемилле known by any other name?

Yes, the medication is known commercially by various brand names depending on the manufacturer and country. Its primary active components are the synthetic Vitamin D analogue Dihydrotachysterol and the mineral salt Calcium Carbonate.


Q: Is there a generic version of Натемилле available?

Official information confirms that generic versions containing the same active ingredients, Dihydrotachysterol and Calcium Carbonate, are available under different names.


Q: Is Натемилле a controlled substance?

Governmental regulatory bodies have indicated that the active ingredients in Натемилле (Dihydrotachysterol and Calcium Carbonate) are not classified as controlled substances.


Q: How does Натемилле compare generally to other medicines for the same condition?

Official information describes the active Vitamin D analogue component as acting more quickly than standard Vitamin D taken in high doses. It is also noted to be less persistent in the body after it is stopped, distinguishing its pharmacological properties from other Vitamin D analogues.


Q: Is it true that Натемилле can interact with certain foods?

Official regulatory warnings state that the drug’s effects require careful management of the dietary intake of calcium, phosphorus, and Vitamin D. Additionally, certain foods, such as grapefruit and grapefruit juice, may interact by potentially altering the drug's blood levels and overall effects.


Q: Can I take vitamins or supplements while using Натемилле?

Official warnings advise against combining this medicine with other Vitamin D analogues or pharmacologic doses of Vitamin D due to the risk of additive toxic effects. Supplements that are high in calcium or phosphorus are subjects of specific monitoring guidelines.


Q: Is it a common concern that Натемилле can cause changes in mood?

Official safety documentation describes mood changes and mental confusion as reported symptoms. These effects are primarily associated with the development of hypercalcemia (too much calcium in the blood), which is a key risk factor for the medicine.


Q: Do any official documents mention driving or operating machinery while on Натемилле?

Official product information notes that side effects such as dizziness or mental confusion (symptoms linked to high calcium levels) may be associated with impaired ability to drive or operate machinery.


Q: Why is there a specific instruction about how to take the tablet form of Натемилле?

Official instructions specify taking the dose with meals and a full glass of water. This procedure is designed to ensure the optimal absorption of the calcium component and to help prevent certain issues in the gastrointestinal tract.


Q: Is the side effect profile different for children versus adults using Натемилле?

Official product information indicates that the core risks of the drug, particularly the potential for hypercalcemia (high calcium levels), are a primary concern across all age groups, from infants to older adults. The primary difference is the requirement for strict dose adjustment based on age and weight.


Q: Is Натемилле safe to use if I have liver problems?

Since the liver is involved in the drug's metabolism, official documentation advises that individuals with pre-existing hepatic impairment (liver problems) should be closely monitored. This is because there is a potential for toxic effects in this population, according to regulatory guidelines.


Q: Can people with kidney conditions use Натемилле?

Regulatory documents state that the drug is absolutely contraindicated (must not be used) in patients with Severe Renal Insufficiency or existing calcium-containing kidney stones. For patients with less severe kidney conditions, use is possible but is subject to specific dose adjustment and frequent monitoring requirements.


Q: What are the most common reasons someone might have to stop taking Натемилле?

The primary reason cited in regulatory documents for temporarily stopping or adjusting the dosage is the development of hypercalcemia (too much calcium in the blood). The administration protocol indicates that the dose is adjusted or withheld based on the results of frequent laboratory monitoring of serum calcium levels.


Q: Are gastrointestinal issues common with Натемилле?

Yes, the official safety profile documents that gastrointestinal disturbances are a reported category of side effect, including symptoms such as nausea, vomiting, constipation, and loss of appetite.


Q: Are there long-term safety studies available for Натемилле?

The body of research evidence indicates that long-term safety is not fully characterized by extensive, contemporary randomized controlled trials for all uses. Official documents note that some studies have relied on observational data and have had limited follow-up durations for definitive long-term outcomes.

How should Натемилле be stored and disposed of?

How to Store and Dispose of Натемилле?

Storage and disposal must align with regulatory requirements to maintain the product's stability and ensure safety. This mandates specific conditions for temperature, protection, and handling.

Storage Requirement Official Regulatory Statement
Temperature & Protection Store in a cool, dry place, typically 15 C to 25 C (59 F to 77 F). The product must be protected from freezing and excessive heat.
Container Integrity The container must be kept tightly closed to prevent moisture uptake, which can affect product stability.
Child Safety It must be kept out of the sight and reach of children; storage in a secure, locked location is mandatory.

Official Disposal Instructions

Unused or expired medication must not be discharged into sewer systems or wastewater. Disposal must follow applicable laws and regulations, typically requiring return to an approved drug take-back program or facility.

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

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