Исмиген

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Исмиген

Quick Facts

Property Description
Active Ingredient Polyvalent Mechanical Bacterial Lysate (PMBL)
Form Sublingual Tablets
Pharmacological Class Immunostimulant, Immunomodulator
Common Purpose Prophylaxis (Prevention) of recurrent respiratory infections
Origin Biological/Derived (from bacterial cultures)

What is Исмиген and its Pharmacological Class?

Исмиген is a specific biological preparation classified pharmacologically as an immunostimulant and immunomodulator. This classification indicates that the medicine is designed to interact with and regulate the body's immune system, rather than fighting an active infection directly like an antibiotic. Исмиген is administered as a specialized sublingual tablet, a distinctive feature intended to facilitate direct absorption of the active material through the oral mucosa, bypassing the environment of the digestive tract.


Composition: The Polyvalent Bacterial Lysates

The core active component in Исмиген is the Polyvalent Mechanical Bacterial Lysate (PMBL), which consists of inactivated fragments derived from eight distinct, clinically relevant bacterial strains. This composition, including fragments from Staphylococcus Aureus, Streptococcus Pneumoniae, and Haemophilus Influenzae B, makes it a combination product. The polyvalent nature ensures exposure to a broad spectrum of microbial structures, supporting a wider immune response. The PMBL is prepared using mechanical lysis, a technique designed to ensure consistent and controlled antigen presentation.


The General Purpose of Immunostimulation

The general purpose of Исмиген is to provide prophylaxis by initiating a controlled form of antigenic stimulation, which helps to educate the immune system. This action is intended for supporting individuals prone to recurrent episodes of respiratory tract challenges. By presenting these non-infectious fragments, the product aims to strengthen the body's non-specific defense mechanisms and enhance mucosal immunity. This physiological action supports the overall goal of achieving a more prepared immune response against future bacterial exposure.

What side effects are possible with Исмиген?

Possible side effects and safety information

The safety profile for this Polyvalent Mechanical Bacterial Lysate (PMBL) preparation is structured using official regulatory classifications that detail potential adverse reactions. The classification reflects the general principles of how side effects are categorized across different physiological systems during clinical use of this class of immunostimulant, based on government regulatory documentation.

The adverse reactions officially listed are categorized by standard frequency tiers (e.g., Common, Uncommon, Rare) and grouped into specific System-Organ Classes (SOCs).

Reactions reported typically fall into categories such as:

  • Gastrointestinal disorders: Including documented effects like nausea and vomiting.
  • Skin and subcutaneous tissue disorders: Such as rash and urticaria (hives).
  • General disorders and administration site conditions: This class includes systemic responses like fever and flu-like symptoms.

A key exposure-related safety pattern noted in regulatory summaries is that flu-like symptoms tend to be most prominent at the initiation of therapy and generally decrease in occurrence with continued use.

Serious Adverse Reactions and Safety Restrictions

Official safety documentation identifies Hypersensitivity reactions as a critical safety domain. As a biological preparation, the most fundamental safety restriction is the contraindication in individuals with known hypersensitivity to the active substance or any of the excipients. Systemic allergic reactions, including anaphylaxis, are classified among the serious adverse events associated with this medicine class.

Regulatory risk assessments for this product class have also noted rare Pulmonary undesirable effects, such as interstitial pneumonia. Patients with a recent history of pulmonary infiltrates or pneumonia are sometimes identified in official risk assessments as a population that may be at higher risk for such events.

Overdose and Emergency Response

Official Regulatory Status on Overdose

Official product information for Исмиген (Polyvalent Mechanical Bacterial Lysate), as reviewed by regulatory authorities, states that no specific cases of overdose have been formally observed or reported in clinical studies or post-marketing experience. This finding is consistent with the product's classification as a low-toxicity biological immunostimulant.

Since no toxic overdose profile has been established, the regulatory documents do not describe specific overdose symptoms, toxic clinical signs, or severe, life-threatening outcomes. The label confirms that no specific antidote is known or required for this product.

Regulator-Mandated Action

Overdose Action Official Guidance
Documented Manifestations None formally observed or reported.
Required Management Symptomatic and supportive treatment, if required.
Antidote Availability No specific antidote is known.
When to Seek Help Seek medical attention or contact a Poison Control Center for advice if an acute, excessive dose is ingested and any unusual or unexpected systemic reaction is noted.

The condition for seeking emergency help is triggered by the need to manage any generalized, non-specific adverse event, rather than a documented overdose syndrome. No specific hospital monitoring protocols are outlined in the regulatory prescribing information for this scenario.

Therapeutic Uses of Исмиген

What Исмиген Treats: Main Uses and Benefits

The medicine is commonly used to support the management of symptoms related to the frequent, repeated infections in the respiratory tract, including conditions like recurrent pharyngitis, sinusitis, and bronchitis. The bacterial lysate class is considered relevant for the prophylaxis of recurrent respiratory tract infections. This prophylactic support is applied in contexts where additional management of discomfort is required due to the cyclical return of these conditions.

“This medicine is primarily relevant for managing the symptomatic patterns of recurrent respiratory illnesses, rather than treating an acute infection.”

The therapeutic benefit is that this may assist with lessening the frequency of symptomatic episodes, which generally contributes to improved day-to-day comfort. For patients with Chronic Obstructive Pulmonary Disease (COPD), it plays a role in managing the risk of infection-triggered exacerbations, assisting with maintaining functional stability and supporting general well-being.

Quick Fact: Relief for Recurrence
Primary Goal Assisting with a lessening of the frequency of respiratory infective episodes.
Symptom Focus Supporting the management of the intensity and duration of illness when it occurs.
Patient Context Commonly used in children, adults, and the elderly prone to repeated infections.

Eligibility and Restrictions for Use

Who can and cannot use Исмиген?

The official eligibility for using Исмиген is strictly defined by regulatory documents, focusing on patient age and pre-existing conditions. The medicine is approved for Adults and the Elderly, as well as Children 3 years and above. Use is formally contraindicated in any patient with a known hypersensitivity to the active substance, Polyvalent Mechanical Bacterial Lysate, or any of the product's excipients.

The label also documents specific population restrictions:

Population Group Eligibility Status Regulatory Constraint
Children under 3 years Not Recommended Contraindicated due to insufficient safety data.
Pregnancy/Lactation Not Recommended Use is advised to be avoided during the first trimester of pregnancy due to lack of controlled human studies.
Acute Infection Avoid Use Restricted to prophylactic use; should not be used for active infection treatment.
Autoimmune Disorders Conditional Use Use with caution is advised for these individuals.

The regulatory label does not document any specific restrictions or requirements for dose adjustment in patients with renal impairment or hepatic impairment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official interaction profile for the polyvalent mechanical bacterial lysate in Исмиген is structured around the drug's mechanism as an immunostimulant.

Interaction Domain Practical Implication based on Official Documents
Immunosuppressive Drugs Concomitant use with agents that suppress the immune system, such as corticosteroids or chemotherapy, may diminish or negate the therapeutic effect of the bacterial lysate.
Vaccines Official documents advise that the administration of a live oral vaccine should be separated by a time interval from the administration of this bacterial lysate product.
Other Immunostimulants Co-administration with other medications designed to stimulate the immune system may require caution or monitoring, as there is a potential for additive or exaggerated effects on the immune response.

Official regulatory sources generally state that no other clinically significant or major pharmacokinetic interactions are known for this product. The key constraints specified in official labeling focus on the potential for reduced efficacy when the immune system is pharmacologically suppressed, and the requirement to time the use of the bacterial lysate separately from live oral vaccines. The overall interaction profile is primarily defined by the drug’s immunomodulatory class.

Mechanism of Action

The polyvalent mechanical bacterial lysate in Исмиген acts as an immunostimulant specifically targeting the mucosa-associated lymphoid tissue (MALT), primarily within the oropharyngeal area. The lysate antigens are internalized and processed by antigen-presenting cells (APCs), notably dendritic cells, initiating an innate immune signaling cascade.

This initial processing drives the activation and proliferation of both B and T lymphocytes within the MALT. B lymphocyte activation subsequently leads to the differentiation into plasma cells, resulting in the localized and systemic production of various immunoglobulins, chief among them being secretory IgA (sIgA) in the mucosal secretions of the respiratory tract.

Concurrently, the interaction modulates the T cell response, favoring a Th1-type immune response. This cellular cascade enhances the phagocytic activity of macrophages and increases natural killer (NK) cell cytotoxicity. The overall consequence is a system-level state of enhanced, non-specific physiological preparedness against relevant pathogenic structures.

Dosage and Administration Information

How to Use Исмиген: Official Administration Guidelines

Исмиген is a biological preparation administered according to a specific, cyclic protocol that establishes its use for prophylaxis, or prevention, rather than the treatment of an acute infection. This protocol is consistent across the drug's documentation and defines the essential details of its route, dosage, and duration.


Administration Scope

Instruction Official Rule
Route of administration Sublingual (under the tongue).
Dosing schedule One 7 mg sublingual tablet per day.
Timing in relation to meals Should be taken before meals (on an empty stomach).
Preparation requirements The tablet requires no dilution or reconstitution. It must be allowed to dissolve completely under the tongue, without chewing or swallowing.
Age-group administration rules The same single daily dose of 7 mg is specified for both adults and children aged 3 years and above.
Missed-dose rules If a dose is missed, it should be taken as soon as remembered; however, a double dose must not be taken to compensate. The planned treatment cycle should still be completed.

Resulting Procedural Structure

Official step sequence for the prophylactic course:

  • The standard regimen involves the administration of one tablet once daily for 10 consecutive days.
  • Following the completion of the 10-day active dosing period, a mandatory 7-day treatment-free interval must be observed.
  • This 10-day dosing and 7-day interval sequence is repeated for a total of three consecutive cycles.

Connection to the overall use protocol:

The official instructions establish a structured, time-bound protocol defined by the sublingual route and the requirement for pre-meal administration. This protocol centers on an intermittent cyclic pattern—10 days of daily dosing followed by a 7-day pause, repeated three times—to fulfill the administration guidelines. This regimen and dosage, which applies to adults and children aged 3 years and above, is strictly defined for prophylactic use.

Recent Clinical Evidence

Исмиген: Recent Clinical Evidence

Ismigen is a Polyvalent Mechanical Bacterial Lysate (PMBL), an immunostimulant composed of fragments from common respiratory pathogens. Research focuses on its role in the prophylaxis (prevention) of recurrent respiratory tract infections (RRTIs) in adults and children, excluding pneumonia.


Efficacy in Respiratory Infections

Clinical data, primarily from randomized, placebo-controlled trials, have investigated the use of PMBLs in reducing the frequency and severity of respiratory infections. A meta-analysis of studies in both children and adults with RRTIs suggested that the lysates were associated with a reduction in the number of infective episodes compared to placebo.

However, a subsequent large-scale, placebo-controlled, double-blind study in young children (aged 4-5) at risk of recurrent Upper Respiratory Tract Infections (URTIs) did not demonstrate a significant benefit over placebo in preventing recurrence or severity of URTIs.


Chronic Obstructive Pulmonary Disease (COPD)

Studies in adults with moderate-to-very severe COPD have explored the use of PMBLs. One double-blind, randomized trial in this population reported that the bacterial lysate was associated with a reduction in the frequency and duration of acute exacerbation episodes when compared to the placebo group. It also reported a decrease in the use of antibiotics for these exacerbations.


Allergic Conditions

Some research has explored PMBLs in allergic conditions, particularly allergic rhinitis (AR). In children sensitive to grass pollen, PMBL administration was associated with a reported decrease in total nasal symptom scores and improved peak nasal inspiratory flow (PNIF) compared to placebo. However, evidence remains limited, and some studies involving PMBLs have not found an effect on reducing nasal carriage of Staphylococcus aureus.

Key Studies & References

  1. Immunomodulation with bacterial lysates in allergic rhinitis: A review of clinical evidence.

Frequently Asked Questions (FAQ)

Common questions about Исмиген (FAQ)


Q: How does a 'bacterial lysate' work to stimulate the immune system?

According to official product information, the bacterial lysate contains inactivated fragments that stimulate the body's natural defenses. The process involves interacting with immune cells in the oral lining, leading to the production of protective antibodies, such as secretory IgA. This physiological action is described as supporting the body's overall immune preparedness.


Q: What happens if I accidentally swallow the tablet before it fully dissolves?

Official regulatory instructions specify that the tablet must dissolve entirely under the tongue for proper absorption. If the tablet is swallowed too early, it may pass through the digestive system, potentially reducing the ability of the active ingredients to achieve the intended effect, as the drug is designed for sublingual absorption.


Q: Is there any evidence that Ismigen helps prevent pneumonia?

Official product documentation states that the medicine is indicated for the prevention of recurrent respiratory tract infections (RRTIs). The clinical trials used to support the drug's approved indication generally focused on RRTIs and did not include the prevention of pneumonia as a primary research outcome.


Q: Is it normal to feel a temporary slight fever or malaise after taking Ismigen?

Regulatory summaries of adverse reactions report that systemic responses, such as a slight fever or flu-like symptoms, are known to occur. This type of reaction is noted as being most prominent when therapy is first initiated, and its occurrence is generally reported to decrease with continued use.


Q: Can I take Ismigen if I have a pre-existing liver condition?

According to the official regulatory documents, no specific restrictions or requirements for dose adjustments are documented for patients who have pre-existing liver (hepatic) impairment. The safety profile does not list liver conditions as a contraindication.


Q: Can the tablet be swallowed whole instead of dissolved sublingually?

The sublingual route (under the tongue) is specified because it allows the active component to be absorbed directly through the oral lining. Swallowing the tablet exposes the bacterial fragments to the digestive tract, which may reduce the drug's ability to achieve the intended immune-modulating effect, as the digestive tract environment may interfere with absorption.


Q: Does Ismigen affect the efficacy of oral contraceptive pills?

Official interaction summaries focus on constraints related to the medicine's immunomodulatory class. Regulatory documents do not specifically list any known pharmacokinetic or clinical interaction between this drug and the efficacy of oral contraceptive pills.


Q: Can Ismigen be used to treat an existing, active respiratory infection?

Official regulatory information specifies that the drug is restricted to prophylactic use and is not indicated for the treatment of an existing, active acute infection.


Q: Are patients with autoimmune diseases permitted to use Ismigen, and what is the caution?

Regulatory documentation specifies that the use of this immunostimulant is advised to be done with caution for individuals who have pre-existing autoimmune disorders. The conditional use statement is based on the drug's classification as an immunostimulant, which modulates the immune system.


Q: Does Ismigen protect against both bacterial and viral respiratory infections?

The active component is a polyvalent bacterial lysate, meaning it consists of fragments derived from eight distinct bacterial strains. The drug’s regulatory purpose is defined as enhancing non-specific defense mechanisms against relevant pathogenic structures.


Q: What are the most commonly reported side effects of Ismigen?

Official regulatory documents classify potential adverse reactions into frequency tiers. The reactions that fall into the more frequently reported categories typically include temporary gastrointestinal disorders (such as nausea or vomiting), skin disorders (like rash or hives), and general systemic responses (such as fever or flu-like symptoms).


Q: Can Ismigen be taken at the same time as prescription antibiotics?

Official interaction summaries provided in regulatory documents do not specify any known clinical interaction between this drug and typical prescription antibiotics. The key constraints focus instead on the use of immunosuppressive drugs and live oral vaccines.


Q: What is the relationship between Ismigen and the potential reduction of subsequent antibiotic use?

Evidence from clinical trials, including those conducted in adults with Chronic Obstructive Pulmonary Disease (COPD), has explored this relationship. Some studies have reported an association between the use of the bacterial lysate and a reduction in the reported use of antibiotics for acute exacerbation episodes.


Q: Does taking Ismigen affect a patient's ability to drive or operate machinery?

According to official product information, the medicine is typically stated to have either no influence or a negligible influence on the ability of a patient to drive or operate machinery.


Q: Is Ismigen safe to use for patients who also have asthma?

Regulatory documents do not list asthma as a specific contraindication for using the medicine. Furthermore, the drug class has been explored in clinical research related to similar allergic conditions, such as allergic rhinitis.


Q: How is Ismigen fundamentally different from a traditional flu vaccination?

Ismigen is officially classified as a polyvalent bacterial lysate and an immunostimulant, which works to non-specifically modulate the immune system. In contrast, traditional flu vaccinations are designed to elicit a very specific, active immune response against certain viral strains identified for that season.


Q: Is there any known interaction between Ismigen and moderate alcohol consumption?

Official interaction summaries detailed in regulatory documents do not document any known clinical interaction between the medicine and the moderate consumption of alcohol.


Q: What are the reported signs of a hypersensitivity or allergic reaction to Ismigen?

Safety warnings in regulatory documents emphasize that patients should monitor for signs of a serious allergic or hypersensitivity reaction. These serious signs may include the sudden swelling of the face, lips, tongue, or throat, or the onset of difficulty breathing.


Q: Is Ismigen safe to use for patients with chronic obstructive pulmonary disease (COPD)?

Clinical studies have investigated the use of this bacterial lysate in adults diagnosed with moderate-to-very severe Chronic Obstructive Pulmonary Disease (COPD). The official use of the drug in this population is for the prophylaxis (prevention) of recurrent respiratory challenges.


Q: Does Ismigen contain ingredients that might cause an allergic reaction in people with specific sensitivities (e.g., lactose or sulfites)?

The official regulatory composition document lists all excipients, which are the inactive ingredients contained in the tablet. Patients with known sensitivities can review this complete list with their healthcare provider to check for potential allergens, such as lactose or sulfites.


Q: Is there a risk of becoming physically dependent on Ismigen?

Official regulatory summaries, including sections dedicated to drug abuse and dependence, do not list or report any potential for the development of physical dependence or abuse associated with the use of this medicine.

How should Исмиген be stored and disposed of?

How to Store and Dispose of Исмиген?

Storing the sublingual tablets requires adherence to specific conditions defined in the official regulatory documentation to maintain product stability and quality.

Storage Requirement Official Classification
Temperature Limit Store at a temperature not exceeding 25 C or 30 C (depending on region).
Packaging Rule Keep the medicine in its original packaging.
Stability Rule Do not use after the expiry date stated on the carton.
Child Safety Keep out of the sight and reach of children.

Official Disposal Instructions

To protect the environment, official regulatory instructions state that expired or unused Ismigen tablets must not be disposed of via wastewater or household waste. Patients should consult their pharmacist or a designated local collection point for instructions on the correct and safe disposal of the medicine.

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

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