Налкром

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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 Налкром

What is Налкром?

Налкром is a medication containing the active ingredient Sodium Cromoglycate (also known as Cromoglicic Acid). It belongs to the pharmacological class known as Mast Cell Stabilizers. This single-ingredient medication functions by stabilizing mast cells—immune cells that store and release inflammatory chemicals, such as histamine.

Sodium Cromoglycate works by inhibiting the degranulation (breakdown) of these mast cells when they encounter an allergen. This action prevents the release of inflammatory mediators that trigger allergic symptoms like itching or congestion. This approach is used for long-term symptom management and serves as a non-steroidal option for controlling persistent allergic conditions.


How is Sodium Cromoglycate Formulated and What is its General Purpose?

Налкром (Sodium Cromoglycate) is produced in several formulations, including oral capsules, nasal spray, ophthalmic solution (eye drops), and inhalant solution. These forms allow the medication to be delivered directly to the areas of allergen exposure via oral, nasal, ophthalmic, or inhalation routes.

The general therapeutic purpose of this medication is to provide prophylactic (preventative) protection against various allergic triggers. For instance, the oral capsule form is intended for local action within the gastrointestinal tract to stabilize the mast cells lining the gut. Oral sodium cromoglycate is indicated for the management of food allergies and systemic mast cell disease, focusing on preventing the allergic response at the site where contact with allergens occurs.

Regulatory References

  1. Mast Cell Stabilizers Overview
  2. Anti-Allergic Agents MeSH
  3. Prophylaxis Definition
  4. Mast Cell Degranulation Overview
  5. Nasal Sprays Definition
  6. Ophthalmic Solutions Definition
  7. Solutions for Inhalation Definition
  8. Oral Administration Route
  9. Nasal Administration Route
  10. Ophthalmic Administration Route
  11. Inhalation Administration Route

What side effects are possible with Налкром?

Possible Side Effects and Safety Information

Adverse reactions to Sodium Cromoglycate (Налкром) are formally classified by government regulatory authorities based on frequency and the body system affected. The safety profile is defined by officially documented reports and clinical data.


Adverse Reaction Scope

The most Common adverse effects documented in regulatory labeling often involve Gastrointestinal Disorders (including diarrhea, abdominal pain, and nausea) and Nervous System Disorders (such as headache and irritability). Other frequently reported reactions include pruritus (itching) and rash. Local effects, such as transient stinging or burning in the eye for ophthalmic preparations, are also common and typically short-lived.

Side effects are grouped by their System-Organ Class. For instance, Skin and Subcutaneous Tissue Disorders may include flushing, erythema, and photosensitivity. Rare effects involving the Blood and Lymphatic System, such as neutropenia or pancytopenia, have also been officially documented.


Documented Serious Adverse Reactions and Safety Constraints

The regulatory safety profile highlights Rare but serious adverse reactions, notably severe allergic reactions including anaphylaxis and angioedema (swelling of the face, lips, or throat). Rare cases of eosinophilic pneumonia have also been reported.

A primary safety restriction is the contraindication for individuals with known hypersensitivity to Sodium Cromoglycate or any of its excipients. The official labeling also includes specific Population-Specific Safety Considerations.

Special Population Safety Notes

  • Renal/Hepatic Impairment: Close monitoring and potential dose reduction may be required due to the drug’s elimination routes (biliary and renal).
  • Pregnancy/Lactation: Use during pregnancy (Category B) is only advised when clearly needed, particularly with caution during the first trimester. Caution is advised during lactation as excretion into breast milk is not confirmed.

This structure ensures all potential risks, from common to rare, are officially communicated and classified, providing a comprehensive regulatory summary of the drug's safety profile.

Overdose and Emergency Response

Overdose and when to seek help

The official prescribing information consistently reports that no specific clinical syndrome is associated with an overdosage of sodium cromoglycate, reflecting its documented extremely low order of acute toxicity. Regulatory records confirm that no toxic effect has been reported following overdose of various formulations.

Emergency Actions and Monitoring

Immediate medical help is required when accidental ingestion or suspected overdose occurs. Official labeling mandates that patients seek professional assistance or contact a Poison Control Center immediately. The regulatory basis for the drug does not include a specific antidote.

For management, regulatory documents advise that clinical action should institute symptomatic treatment. Following an overdose of the ophthalmic solution, one official instruction is that medical observation should suffice, and for excessive local application, washing copiously with sterile physiologic serum may be advised.

Official Overdose Statements

  • Regulatory information confirms there is no specific clinical syndrome associated with an overdosage of cromolyn sodium.
  • In case of accidental ingestion or suspected overdose, patients must seek professional assistance or contact a Poison Control Center immediately.
  • Management following overdosage should institute symptomatic treatment.

Connection to the Overall Overdose Profile

The regulatory profile for sodium cromoglycate is defined by its low systemic absorption and established minimal acute toxicity. Official labeling notes the absence of a defined clinical syndrome, which guides the required response toward symptomatic treatment rather than specific countermeasures. Despite this low-risk profile, regulators strictly mandate that individuals seek immediate professional assistance upon suspected overdose, ensuring proper emergency protocol is followed.

Therapeutic Uses of Налкром

What Налкром Treats: Main Uses and Benefits

Налкром (cromolyn sodium) is commonly used to help with the management of symptoms across certain distressing conditions. This medication is applied across domains where additional symptomatic support is needed. This medicine is relevant for easing symptoms that interfere with daily functioning, such as those associated with allergic rhinitis, mastocytosis, and chronic keratitis.

The medication helps address symptom clusters that may become intense or disruptive, particularly when they create noticeable physiological strain. In general clinical scenarios, it is often used when symptoms intensify and supportive relief is needed, assisting patients during phases of increased distress or discomfort. It provides support that helps ease the overall symptom burden.

“It supports patients during difficult episodes by easing distress and may help patients cope more steadily with symptom fluctuations.”

For conditions characterized by episodic or fluctuating manifestations, Налкром is commonly used to help manage symptoms. It contributes to improved day-to-day comfort during symptomatic periods and assists with maintaining functional stability.

Quick Fact: Relief for Symptoms that interfere with daily functioning.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Eligibility Scope

Property Status
Populations for whom use is allowed Adults and children 2 years of age and older (for oral and nasal solutions).
Populations for whom use is not recommended Pediatric patients under 2 years of age for oral and nasal solutions.
Populations for whom use is contraindicated Patients with a known hypersensitivity to Cromolyn Sodium or its components.
Age-related eligibility rules Generally approved for ages 2 years and older. Caution is advised for dose selection in older adults due to the potential for decreased organ function.
Condition-specific eligibility rules Use requires caution in patients with impaired renal function or impaired hepatic function.
Pregnancy and lactation eligibility Pregnancy Category B; use only if clearly needed. Caution is advised during lactation as excretion into human milk is unknown.

Eligibility Classifications

Property Classification
Eligibility severity classification Contraindicated (Hypersensitivity), Not Recommended (Under 2 years), Conditional Use (Organ Impairment).
Eligibility-context constraints Constraint based on age, organ function, and confirmed allergic status.

The official regulatory profile for Cromolyn Sodium establishes clear population eligibility and exclusion criteria. The only absolute contraindication is a confirmed hypersensitivity to the active ingredient or any excipients contained within the specific formulation. Eligibility is primarily restricted by age, with the oral and nasal solutions generally approved for adults and children aged 2 years and older, while use in children under 2 years is not recommended by regulators unless the potential benefits for severe disease clearly outweigh the risks. Furthermore, the profile mandates conditional use requiring caution and potential dose adjustments for individuals with impaired renal or hepatic function. Regarding reproductive status, use during pregnancy should occur only if clearly needed, and caution is advised during lactation.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The regulatory profile for Nałkrom (Sodium Cromoglycate) shows a general absence of conventional pharmacokinetic or pharmacodynamic drug-drug interactions. The official information focuses primarily on administration constraints and altered drug clearance in specific health conditions.

Administration-Based Restrictions

Administration of the oral formulation is subject to specific timing and mixing restrictions. The medicine must not be mixed with fruit juice, milk, or food, as officially documented data indicates this combination interferes with the medicine's proper local action and is associated with a reduction in efficacy.

For the ophthalmic solution, an administration separation rule applies to non-medicinal products. Soft contact lenses must be removed before the drops are instilled and may not be reinserted earlier than 15 minutes after use. This mandatory timing separation is required because the preservative, Benzalkonium chloride, is documented to deposit on the lens material.

Population-Specific Exposure Considerations

Official labeling notes that systemic exposure to Sodium Cromoglycate may be affected by the patient’s health status. In the presence of impaired renal function (kidney disease) or impaired hepatic function (liver disease), reduced drug clearance is a documented risk. This altered clearance may lead to officially noted increased systemic exposure and a higher chance of systemic effects.

Mechanism of Action

Налкром (cromolyn sodium) functions as a mast cell stabilizer. Upon oral administration, the minimally absorbed drug concentrates its pharmacologic action locally on mucosal mast cells within the gastrointestinal tract.

Its principal target is the mast cell membrane, where the drug acts as an inhibitor of the degranulation process. Mechanistically, cromolyn sodium modulates the signal transduction cascade that follows the binding of an allergen to IgE antibodies on the mast cell surface. This interaction prevents the subsequent calcium ion ( Ca^2+) influx across the cell membrane, a critical intracellular event necessary for degranulation.

By blocking this Ca^2+ entry, the drug maintains the structural integrity and stability of the mast cell membrane, preventing the fusion of mediator-containing granules with the cell surface. The downstream cascade is the inhibited exocytosis and release of preformed and newly synthesized pro-inflammatory mediators, including histamine, leukotrienes, and tryptase, from the sensitized mast cells. This selective cellular action modulates localized inflammatory and systemic immune signaling.

Dosage and Administration Information

How to use Налкром

The usage of Sodium Cromoglycate (Налкром) is based on high-level prophylactic principles and is governed by the specific route of administration chosen. The medicine is available and used in formulations for oral consumption (capsules or solution), inhalation (nebulized solution), and intranasal application (spray). Each form is intended for localized action, and the oral solution concentrate is strictly designated for consumption and is not to be used for inhalation or injection.

Dosing Schedule and Timing

Administration follows a rigorous, regularly scheduled frequency, typically four times daily (QID), to maintain the necessary preventative concentration. For the oral form, the standard adult starting dose is 200 mg (two units) QID. The maximum daily dose should generally not exceed 40 mg/kg. Once control is achieved after the initial 2 to 3 weeks, the regimen permits a gradual dose reduction to the minimum effective maintenance level.

Crucially, oral administration involves specific timing constraints: doses must be taken on an empty stomach, commonly 15 to 30 minutes before meals and at bedtime. Depending on the specific product, the capsule contents may be dissolved in water or the oral concentrate must be diluted with water before being consumed.

Population-Specific Rules

Specific administration rules apply to certain populations. Pediatric patients (e.g., 2 to 12 years) typically begin with a lower 100 mg dose QID. For patients with known renal or hepatic impairment, caution is indicated, and consideration is given to decreasing the oral dose.

Recent Clinical Evidence

Research evidence / Overview of studies for Nalcrom


Evidence for use in Food Allergy

This section will summarize the clinical trials and research studies that have investigated Nalcrom's use in relation to the gastrointestinal symptoms associated with food allergies in patients, which is the primary licensed indication. This will include how studies measured changes in symptoms like diarrhea, stomach pain, and vomiting.

Nalcrom was studied for its use in relation to symptoms of food allergy that affect the stomach and intestines. Research in this area examined outcomes related to physical discomfort and patient-reported outcomes describing perceived discomfort. The findings indicate patterns where a decrease in the intensity or frequency of these specific gastrointestinal symptoms was observed in some studied populations. However, the degree of change was observed in some studies to vary, and research does not determine whether an individual will respond similarly.

Evidence for use in Mastocytosis

Research has been studied for Nalcrom's use in addressing certain gastrointestinal issues linked to mastocytosis, a condition characterized by fluctuating or episodic manifestations. Studies in this context examined outcomes related to systemic or functional imbalance and severe outcomes describing episodic or acute changes in symptoms like diarrhea and abdominal pain.

Studies suggest that for some individuals with mastocytosis, patterns related to a change in the frequency and severity of certain gastrointestinal problems were observed when using Nalcrom. However, the evidence for Nalcrom's use in mastocytosis is limited, and sample sizes were modest. Therefore, certainty remains low regarding a comprehensive picture of its use in this patient group.

Long-term studies and follow-up

Most clinical trials were designed to evaluate the short-term impact of Nalcrom over weeks or a few months. Therefore, long-term outcomes are not fully established, and follow-up durations were limited in the initial research. Research exploring short-term symptom changes provides context but not individual predictions about how patients will fare after many years of use. There is limited information for long-term outcomes regarding the durability of the observed changes.

What is still uncertain about Nalcrom

Evidence quality varies across studies, and findings were mixed in some research. This variability contributes to understanding symptom patterns but makes a unified conclusion difficult. Comparative evidence is lacking to directly compare the use of Nalcrom against other interventions. Furthermore, long-term effects are not fully established, and research is still exploring where Nalcrom fits within the broader evidence landscape.

Frequently Asked Questions (FAQ)

Common questions about Налкром (FAQ)


Q: How quickly does a person typically feel the effects of Налкром after starting treatment?

According to official product information, the medicine has a slow onset of action. Therapeutic effects may be delayed for several days, and the full benefit may take several weeks of consistent, regular use to be observed. Because the medicine is preventative, it must be taken regularly.


Q: If I accidentally take an extra capsule, what are the expected effects?

Regulatory data on acute oral overdosage in humans is not specifically detailed in public labeling. However, the medicine is generally known to be poorly absorbed from the digestive tract, with less than one percent entering the bloodstream.


Q: How is the typical length of time a patient stays on this medicine described?

The medicine is classified as prophylactic, meaning it is intended to prevent symptoms rather than treat acute events. Due to this preventative nature, the medicine is generally described as being suitable for long-term, consistent management to maintain its effect.


Q: What is the main difference between Налкром and other similar allergy medications?

The medicine is classified as a mast cell stabilizer. Official labeling notes that it is distinct from antihistamines or corticosteroids because it has no intrinsic antihistamine or glucocorticoid activity.


Q: Why is Налкром prescribed for digestive issues instead of just allergies?

The oral solution is officially approved for use in conditions like Systemic Mastocytosis. Studies indicate that it manages the associated gastrointestinal symptoms, such as abdominal pain and diarrhea, which are common in this condition.


Q: Is it true that Налкром can help with food sensitivities, and how does that work?

Official literature mentions the use of the medicine in the management of gastrointestinal disorders, including the prevention of food allergy symptoms. Evidence indicates the medicine works by stabilizing mast cells in the gut and inhibiting their release of inflammatory mediators.


Q: Does taking Налкром mean I can stop avoiding certain trigger foods?

The medicine is described in official documents as being prophylactic, or preventative, in nature. It is generally used as an adjunct to an overall management plan, which may still include the avoidance of known trigger factors.


Q: Are there any long-term safety considerations for using Налкром for many months or years?

The medicine has a long-standing safety profile. For consistent daily use over extended periods, some official labeling notes the importance of clinical oversight.


Q: What are the most commonly reported side effects when first starting Налкром?

According to official data, the most commonly reported side effects from oral use include headache, nausea, abdominal pain, and diarrhea.


Q: Is it possible for a side effect to appear after I have been taking the medicine for a while?

Official reports indicate that allergic-type reactions (known as hypersensitivity reactions) have been reported to develop in some cases after weeks or even years of using the medicine.


Q: Does Налкром affect my body weight or metabolism?

According to official prescribing information, change in body weight is not listed as a commonly reported or rare adverse reaction.


Q: What is the connection between mast cells and how Налкром is described to work?

The medicine is classified as a mast cell stabilizer. It works by inhibiting the release of certain chemical mediators, such as histamine and leukotrienes, from mast cells in the body.


Q: Is Налкром considered an immunosuppressant drug?

The medicine is described as an anti-allergic or anti-inflammatory agent that stabilizes mast cells. Official labeling does not classify it as a systemic immunosuppressant drug.


Q: Are there any restrictions on driving or operating machinery while taking Налкром?

Although specific warnings about driving are not always present, regulatory documents report potential nervous system-related effects like headache and dizziness, which may affect attention.


Q: Is there any research that looks at Налкром's use during pregnancy or breastfeeding?

The medicine is assigned Pregnancy Category B, indicating animal studies have not shown risk, but there are no adequate studies in pregnant women. It is also not known if the drug is excreted in human milk. Use is permitted only if clearly needed.


Q: Why are there different brand names or versions of this medicine, and are they the same?

The active ingredient in all versions is Cromolyn Sodium (or Sodium Cromoglycate). Different brand names typically denote the specific drug formulation, such as an oral capsule, a nasal spray, or an inhalation solution.


Q: What happens in the body if I stop taking Налкром suddenly?

Because the medicine is prophylactic, official studies suggest that clinical improvement may only persist for a few weeks after the drug is discontinued.


Q: Does alcohol interact with Налкром, and what is the official guidance?

Official regulatory text does not detail a specific drug-alcohol interaction. However, general guidance on the use of alcohol is often addressed with a healthcare professional when taking any medicine.


Q: Is it normal to feel a change in my symptoms when I first start taking the medicine?

It is possible to notice common side effects like headache or nausea when first starting the medicine. Due to the slow onset of its therapeutic effect, symptom changes related to the condition itself may take several days or weeks to appear.


Q: How does the medicine know where to work in the body?

The oral form is poorly absorbed by the body, with most of the drug remaining in the digestive tract. This property allows it to work primarily locally within the gut, where it is intended to stabilize mast cells.


Q: What is the regulatory status of Налкром in major countries like the US or EU?

The medicine is regulated and approved for specific indications by major international regulatory bodies, including the U.S. Food and Drug Administration (FDA) and European health authorities.


Q: Is the medication designed to be used temporarily or for long-term symptom management?

The medicine is prophylactic and is designed to be used consistently and for long-term symptom management, rather than for the temporary relief of acute symptoms.


Q: What is the current scientific consensus or evidence theme for using Налкром?

Official regulatory documents rely on controlled clinical trials that have demonstrated the medicine's ability to provide symptomatic relief in approved conditions, such as gastrointestinal and cutaneous manifestations of mastocytosis.


Q: What are the conditions that would prevent a person from being eligible to use Налкром?

Official labeling states that the medicine is contraindicated and should not be used by patients with a known hypersensitivity or allergy to Sodium Cromoglycate or any of its inactive ingredients.


Q: What is the difference between this medicine and a regular antihistamine?

The medicine is classified as a mast cell stabilizer, which works by preventing the release of histamine. Regulatory text notes that it has no intrinsic antihistamine activity, distinguishing it from regular antihistamines.


Q: Does taking Налкром require any special dietary changes besides avoiding known allergens?

Official prescribing information details the timing of administration relative to meals (on an empty stomach) but does not mandate other specific dietary changes beyond that.


Q: Are there any reported interactions with common nutritional supplements or vitamins?

Official regulatory documents address the importance of all supplements, in addition to other medications, being reviewed with a healthcare professional.


Q: Why do official documents state that this medicine is poorly absorbed by the body?

Official documents state that no more than 1% of an administered oral dose is absorbed systemically into the bloodstream. This property is key to its use, as it primarily works locally within the gut.


Q: Is Налкром considered a high-risk medication by regulatory bodies?

Regulatory information and classifications, such as its long-standing safety profile and the Pregnancy Category B status, generally indicate a favorable risk profile.


Q: Can the medicine be used alongside over-the-counter pain relievers?

Official regulatory documents address the importance of all non-prescription (over-the-counter) medicines being reviewed with a healthcare professional to check for any potential interactions.


Q: How is the safety profile of this medicine described in comparison to similar classes of drugs?

The safety profile is generally considered favorable, with minimal serious adverse events reported in official summaries compared to other drug classes used for similar conditions.


Q: Are there any known cases of addiction or dependence associated with Налкром?

The medicine is not classified as a controlled substance in regulatory documents, and addiction or dependence is not listed among the reported adverse events.


Q: Why is the drug primarily used for certain gastrointestinal conditions?

The drug is primarily used for the symptomatic treatment of disorders like systemic mastocytosis. Its ability to stabilize mast cells in the gut helps manage associated symptoms such as abdominal pain and diarrhea.


Q: What should I tell my other doctors or specialists about taking Налкром?

Official regulatory documents underscore the importance of all healthcare professionals being aware of the medicine being taken, along with any other medications, supplements, or non-prescription products.


Q: What official research has been done on the pediatric use of Налкром?

Official documents detail specific dosing for pediatric patients as young as two years old. This indicates the existence of clinical data to support its approved use in this younger population.


Q: Can I store the medicine in my bathroom cabinet?

Official instructions advise storing the medicine at room temperature and in a dry place, away from moisture and direct sunlight.


Q: What are the key facts about the research evidence behind the drug's approved uses?

The evidence behind its approved uses comes from controlled clinical trials that demonstrated its ability to reduce symptoms in specific patient populations, such as those with mastocytosis.


Q: Is the use of Налкром mentioned in any major medical guidelines?

While the medicine is an approved drug, some official summaries note that the inhalation form is not currently recommended as a first-line treatment in certain major asthma guidelines.


Q: Does the medicine contain any ingredients that could trigger an allergic reaction?

The official contraindication states that the product should not be used if a patient is allergic to the active ingredient, Sodium Cromoglycate, or any of its inactive components.


Q: What does the term 'mast cell stabilizer' actually mean in simple terms?

The term describes the medicine's action of preventing mast cells, which are immune cells involved in allergy and inflammation, from releasing chemicals that can trigger symptoms.


Q: What if I take another medicine that is not listed in the official interactions guide?

Official regulatory documents address the importance of all prescription, non-prescription (OTC), and supplement use being reviewed with a healthcare professional.

How should Налкром be stored and disposed of?

How to Store and Dispose of Nalcrom (Cromolyn Sodium)

Nalcrom must be stored according to specific regulatory conditions to maintain its effectiveness. The oral concentrate and inhalation solution should be stored at controlled room temperature (20 C to 25 C or 68 F to 77 F).

Storage Requirements

Condition Requirement
Temperature Do not refrigerate or freeze, as this may cause crystallization.
Protection Protect all forms from light; the oral concentrate must also be protected from moisture.
Handling Inhalation solution ampules must be used immediately or discarded once removed from the original foil pouch.
Safety Keep the medicine out of the sight and reach of children.

Disposal

Unused or expired Nalcrom must be disposed of according to local requirements for pharmaceutical waste. Do not dispose of the medication by flushing it down a toilet or pouring it into a drain.

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

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