Normaflore

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Normaflore

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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 Normaflore

What is Normaflore?

Normaflore is a probiotic preparation designed to support the restoration and maintenance of the intestinal bacterial flora. It contains the spores of Bacillus clausii, a type of beneficial bacterium that is normally present in the healthy human gut.

Composition and Mechanism

The primary active component of Normaflore is Bacillus clausii. These bacteria are provided in the form of spores, which are a dormant, highly resistant stage of the microorganism. This spore form allows the bacteria to survive the acidic environment of the stomach and reach the intestinal tract intact.

Once the spores reach the intestine, they transform into active (vegetative) cells. In this state, they contribute to the biological balance of the digestive system by:

  • Restoring Flora: Helping to repopulate the gut with beneficial bacteria after disruptions caused by various factors.
  • Producing Nutrients: Synthesizing various vitamins, particularly B-complex vitamins, which are essential for metabolic health.
  • Supporting Equilibrium: Occupying niches in the intestinal lining to help maintain a stable microbial environment.

Physical Characteristics

Normaflore is typically presented as an oral suspension. In this form, it is a colorless, slightly opalescent liquid with a neutral taste, contained in small plastic vials. It is also available in capsule form for adult use. Because the active ingredient is biological, the preparation is designed to be odorless and tasteless to facilitate ease of use.

Regulatory References

  1. NIH Review of Bacillus clausii

What side effects are possible with Normaflore?

Possible Side Effects and Safety Information

The official safety information for this medicine, primarily based on regulatory reviews, focuses on the potential for serious, disabling, and potentially irreversible adverse reactions that can affect multiple body systems.

Key Adverse Reaction Categories

Classification System-Organ-Classes Involved
Serious and Potentially Irreversible Musculoskeletal System (tendons, muscles, joints), Nervous System (peripheral and central), Psychiatric System, and Senses.
Frequency Very rare (for the most serious effects)

The most clinically significant adverse reactions documented in regulatory sources include: inflamed or torn tendons (tendonitis/tendon rupture), muscle pain or weakness, joint pain or swelling, difficulty walking, symptoms of neuropathy (pain, burning, tingling, numbness, or weakness), severe tiredness, depression, memory impairment, and changes in vision, hearing, taste, or smell.

Safety Restrictions and Considerations

Safety Domain Regulatory Statement
Contraindication This medicine is contraindicated (should not be used) in patients who have a history of serious adverse reactions to any medicine in this same antibiotic class.
Vulnerable Populations Patients in certain groups have an increased risk of tendon injury. This includes individuals over 60 years of age, those with kidney impairment, recipients of a solid organ transplant, and patients concurrently taking systemic corticosteroids.
Exposure Pattern Tendon injury can occur rapidly, within the first 48 hours of starting treatment, but it has also been reported to occur several months after stopping the medication.

This regulatory profile establishes that the medicine's use is restricted due to the potential for severe adverse events, highlighting the importance of understanding these rare but serious risks.

Overdose and Emergency Response

Overdose Map: Overdose and when to seek help — Official Regulatory Information for Normaflore

Overdose Scope

Classification Official Regulatory Statement
Documented Overdose Presentations Official regulatory documentation indicates a lack of specific symptoms; no cases of overdose have been reported in the labeling, and excessive doses do not produce side effects.
Physiological Systems Affected The label describes a severe risk of systemic infection, including bacteremia or sepsis, primarily for patients who are immunocompromised or hospitalized due to a serious illness.
Emergency-Response Statements Regulators explicitly require that medical help must be sought immediately upon the accidental ingestion or administration of an overdose. This involves immediate notification of a doctor or referral to the nearest hospital for observation.

Overdose Classifications (High-Level)

Classification Official Regulatory Statement
Severity Classification Low acute toxicity; overdose is described as not producing side effects.
Antidote/Management No specific antidote is known or documented. Management is defined as symptomatic and supportive treatment that may require hospital monitoring.

Resulting Overdose Structure

The regulatory profile defines overdose primarily through the absence of documented specific symptoms or acute toxicity upon ingestion of excess amounts. This low toxicity is countered by a mandate for immediate professional medical attention, officially requiring notification of a doctor or transport to a hospital. This required action serves to manage any potential unforeseen complications, particularly in susceptible populations who face a documented risk of severe systemic infection. This approach ensures that hospital monitoring and supportive measures can be readily implemented.

Therapeutic Uses of Normaflore

Main Uses and Benefits of Normaflore

Normaflore is a probiotic preparation containing Bacillus clausii spores, which are beneficial microorganisms designed to support the restoration and maintenance of the intestinal bacterial flora. This flora is a complex ecosystem of microorganisms that plays a vital role in digestion and immune health.

Restoration of Intestinal Flora

The primary use of Normaflore is to address imbalances in the intestinal microbiota, often referred to as dysbiosis. The intestinal flora can be disrupted by various factors, leading to a decrease in beneficial bacteria. Normaflore helps to repopulate the gut with healthy bacteria, supporting the recovery of the natural microbial balance.

Supportive Treatment During Antibiotic Therapy

Antibiotics are designed to eliminate pathogenic bacteria; however, they often unintentionally affect the beneficial bacteria living in the digestive tract. This disruption can lead to gastrointestinal side effects. Normaflore is frequently used as a supportive treatment during and after antibiotic therapy to help protect and rebuild the intestinal flora.

Management of Intestinal Disturbances

By contributing to a healthy microbial environment, Normaflore helps manage various non-specific intestinal disturbances. A balanced flora is essential for:

  • Regular Digestion: Assisting in the breakdown and absorption of nutrients.
  • Metabolic Support: Producing certain vitamins, such as B-complex vitamins, which are synthesized by healthy gut bacteria.
  • Immune Function: Supporting the gut-associated lymphoid tissue, which acts as a primary defense mechanism for the body.

Benefits of Bacillus clausii Spores

The specific use of Bacillus clausii spores offers distinct benefits for intestinal health:

  • Resilience: The spore form allows the bacteria to survive the acidic environment of the stomach, ensuring they reach the intestines where they can become active.
  • Multi-strain Action: These microorganisms contribute to a diverse and stable intestinal environment, which is more resistant to colonization by harmful bacteria.

Regulatory References

  1. NIH MedlinePlus guidance on Probiotics

Eligibility and Restrictions for Use

Who can and cannot use Normaflore?

Regulatory documentation defines population eligibility for Normaflore (Bacillus clausii) through absolute prohibitions and conditions for use in vulnerable patient groups.


Eligibility Scope

Classification Population Regulatory Status
Contraindicated Patients with hypersensitivity to the active substance or excipients. Absolute prohibition
Non-oral administration (e.g., injection). Absolute prohibition
Conditional Use Immunocompromised patients or patients hospitalized due to serious illness. Requires benefit-risk assessment
Pregnant and lactating women. Requires benefit-risk assessment
Established Use Adults, Children, and Infants. Generally permitted

Eligibility Classifications

Official labeling establishes absolute prohibition for individuals with known allergies to any component, and strictly mandates that the medicine is for oral use only. Use in populations with weakened natural defenses, such as immunocompromised individuals or those seriously ill and hospitalized, is officially restricted; in these cases, the product must only be used if the potential benefits outweigh the potential risks. The medicine is labeled as established for use across the entire age spectrum, including adults, children, and infants.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory information for Normaflore (Bacillus clausii) is characterized by a high-level focus on a specific pharmacodynamic interaction and the general absence of systemic pharmacokinetic interactions.


Official Interaction Structure

Interaction Entity Regulatory Finding
Metabolic Interactions (CYP Enzymes) None documented. The non-systemic nature of the product means it does not participate in CYP-mediated interactions.
Contraindicated Combinations None documented. Official prescribing information does not list any medicinal products strictly prohibited for co-administration.
Exposure-Altering Effects None documented. No substances are listed as increasing or decreasing the concentration (AUC/Cmax) of co-administered medicines.
Food, Alcohol, or Supplements None documented. Regulatory sources provide no specific warnings or administration restrictions regarding food, alcohol, or supplements.

Pharmacodynamic Conflict with Antibiotics

Antimicrobial Agents (Antibiotics) represent the only class of medicine with a documented interaction pattern. Co-administration may lead to a diminished therapeutic effect by reducing the viability of Bacillus clausii in the gut.

To address this potential conflict, regulatory labeling requires a mandatory time separation between doses. The product must be administered in the time interval between one dose of antibiotic and the next, a constraint that forms the primary interaction-related restriction in the product's official profile.

Mechanism of Action

How Normaflore Works

Normaflore, depending on the formulation, employs distinct biological and physiological mechanisms through its active components. The oral suspension, containing Bacillus clausii spores, and the vaginal tablet, which may contain ascorbic acid (Vitamin C) or a blend of probiotic strains, operate within specific mechanistic domains.


Modulation of the Gut Microbiota

This domain covers the action of the B. clausii spores in the oral formulation. It involves the germination and colonization of the probiotic bacteria in the intestinal lumen, which alters the composition of the intestinal microbiota by increasing the ratio of B. clausii species and influences the local intestinal environment. These bacteria produce specific metabolic byproducts that impact local intestinal function.


Pathogen Competitive Exclusion

This mechanism involves the B. clausii spores and other viable probiotic strains. The probiotic organisms exhibit competitive inhibition for colonization sites and nutritional resources against other microbial species on the mucosal surface. This competition modulates local microbial growth dynamics and influences the homeostatic state of the host-microbe interface.


Production of Antimicrobial and Metabolic Factors

The probiotic strains engage mechanisms that influence feedback regulation within the local pathway. They synthesize antimicrobial substances, such as bacteriocins and specific metabolic acids, which inhibit the replication of sensitive microbial species. This directly modifies the molecular steps that shape systemic physiological outcomes by supporting a microbial environment characterized by altered pH and molecular factor concentration, and altering the local concentration of immune and metabolic mediators.

Dosage and Administration Information

How to Use Normaflore

Normaflore is administered according to standardized procedures outlining the route, dosage, and timing. The active ingredient, Bacillus clausii spores, is for consumption and is not to be used by any other method.


Administration Scope

Feature Instruction
Route of administration Oral route only. Administration by injection or any other route is prohibited.
Dosing schedule Standard Adult Dose: 2 to 3 vials per day, typically containing 4 to 6 billion spores daily.
Child/Infant Dose: 1 to 2 vials per day, typically containing 2 to 4 billion spores daily.
Timing in relation to meals (if applicable) May be taken with or without food. When concurrent antibiotic use occurs, the preparation must be administered between two subsequent doses of the antibiotic medication.
Preparation requirements (if applicable) The vial must be shaken well before use to ensure the proper suspension of the spores. The liquid may be consumed as is or diluted in water or various beverages.
Age-group administration rules Specific daily dose ranges are provided for adults, children/adolescents, and infants.
Missed-dose rules Instructions for handling missed doses are generally not detailed in the core high-level administrative sections for this product.
Special procedural conditions The treatment course is typically continued for 7 to 10 days following the completion of an antibiotic course to support the overall use pattern.

Instruction Classifications (High-Level)

Classification Detail
Administration method type Oral
Frequency pattern Multiple times per day (e.g., two to three times daily), taken at regular intervals.
Use-context constraints The product must never be injected and has specific timing constraints when co-administered with antibiotics.

Resulting Procedural Structure

Official step sequence:

  • Verify the correct daily dose (1–3 vials) based on the age-group regimen.
  • Shake the vial well to ensure the suspension is homogenous.
  • Consume the liquid orally, either neat or diluted in a beverage.
  • Administer doses at regular intervals throughout the day.
  • Space administration between antibiotic doses when co-therapy is required.
  • Continue the use for the prescribed duration, often extending past antibiotic cessation.

Connection to the overall use protocol (2–4 sentences): The established administration guidelines define a procedure focused on the proper delivery of the preparation. This procedure mandates the exclusive oral route, defines precise age-specific dosing, and includes a necessary timing constraint relative to other medications. By standardizing preparation and use duration, these guidelines ensure a consistent method of administration.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Normaflore (Bacillus clausii)

The research base for Normaflore's active ingredient, Bacillus clausii, has been developed primarily through controlled clinical trials and subsequent scientific reviews. This body of evidence describes what has been observed so far in specific patient groups under defined study conditions, providing context but not individual predictions.


Evidence for Use in Acute Diarrhea and Gastroenteritis

Research has explored the administration of Bacillus clausii in patients with acute diarrheal illnesses and acute gastroenteritis. Studies include Randomized Controlled Trials (RCTs) and comprehensive meta-analyses. The studies monitored measurement axes related to physical discomfort, such as the duration of diarrhea and changes in stool consistency. Research also explored whether administration was observed in some studies to have associations with measurements of shorter hospital stays in some settings. However, scientific reviews highlight substantial heterogeneity (inconsistency) across study results, and evidence quality varies.


Evidence for Preventing Antibiotic-Associated Diarrhea

The active ingredient was also studied for its potential role in patients taking antibiotics. Studies monitored the occurrence rate of Antibiotic-Associated Diarrhea (AAD) and monitored patient-reported outcomes describing perceived discomfort. Research so far indicates patterns where patients receiving B. clausii were recorded with different AAD incidence rates compared to control groups. A key research limitation is that sample sizes were modest in some individual trials, and data for certain groups remain insufficient due to variations in the specific antibiotics used.


What is Still Uncertain About Normaflore Research

The research exploring Bacillus clausii includes data for distinct age groups, such as pediatric patients and the general adult population. Follow-up durations were limited for most groups, mainly focused on the acute treatment phase. Based on authoritative scientific reviews, long-term effects are not fully established, as existing studies focus predominantly on short-term symptom changes. Scientific bodies often note that the specific effects of probiotic strains are highly dependent on the strain itself, requiring ongoing research to fully contextualize the findings.

Frequently Asked Questions (FAQ)

Common questions about Normaflore (FAQ)


Q: If I miss a dose of Normaflore, should I take two the next time?

A: If a dose of Normaflore is missed, regulatory patient information advises against taking an extra amount to make up for it. Instead, if it is almost time for your next scheduled dose, the regulatory procedure describes skipping the missed dose and continuing with the regular schedule.


Q: How quickly does Normaflore start working for stomach issues?

A: The specific time required for the medicine to show its overall intended effect is not definitively established in regulatory summaries. However, studies examining the use of the active ingredient for acute diarrheal illnesses have reported that symptom measurements, such as diarrhea duration, are typically monitored for improvement within the first 1 to 3 days of beginning treatment.


Q: Are there any common side effects people report when starting Normaflore?

A: According to official product information, common side effects are generally mild and may include digestive symptoms such as gas, bloating, and flatulence. Additionally, rare cases of hypersensitivity reactions, like a skin rash, hives (urticaria), or swelling around the lips and eyes (angioedema), have been reported during post-marketing surveillance.


Q: What should I do if a potential side effect feels severe?

A: Regulatory guidance suggests that if any side effects are experienced that are severe, or if symptoms worsen, the regulatory guidance includes consulting with a healthcare professional.


Q: What research themes are commonly explored regarding Normaflore?

A: The research base primarily focuses on the active ingredient’s role in two main areas: the prevention of antibiotic-associated diarrhea (AAD) and the management of acute diarrheal illnesses. Additionally, studies and scientific reviews have explored its potential use for symptoms related to irritable bowel syndrome (IBS) and recurrent respiratory infections.


Q: What distinguishes Normaflore's active ingredient from other common 'good bacteria'?

A: Normaflore contains Bacillus clausii in a spore form, which is a key differentiator mentioned in regulatory descriptions. This spore structure is described as conferring specific tolerance to stomach acid and bile, supporting the delivery of viable organisms to the intestine for colonization.


Q: Is it okay to mix Normaflore with hot beverages?

A: Official administration instructions state that the liquid suspension may be consumed as is or diluted in water or various beverages, which includes milk, tea, or orange juice. While the active spores are described as exhibiting heat tolerance, the regulatory product information does not specify the maximum allowable temperature for mixing.


Q: What is the general expectation for the time it takes to feel better after starting Normaflore?

A: The timeframe for feeling overall improvement can vary depending on the underlying cause of the gut imbalance. For people taking it to address acute diarrheal symptoms, research has generally monitored a reduction in the duration of symptoms within the first few days of starting the treatment.


Q: Does the benefit of Normaflore stop as soon as I stop taking it?

A: Studies cited in regulatory summaries suggest that the active spores of Bacillus clausii can persist in the gut for a period after the last dose is taken. Research has detected the presence of spores in faeces for up to approximately 12 days following cessation of treatment.


Q: Can Normaflore be taken for general digestive comfort?

A: The medicine is indicated for treating alterations in the intestinal bacterial flora, such as those that occur with diarrhea or antibiotic use. Official patient information summaries also describe the preparation’s use for supporting people who experience general gastrointestinal issues, including flatulence and irregular bowel movements.


Q: What is the difference between Normaflore and a standard yogurt containing live cultures?

A: The main distinction is that Normaflore contains a spore-forming bacterium. The spore form provides specific tolerance to stomach acid and bile, which is described as supporting the organism's survival through the digestive process. Cultures in standard yogurt often use non-spore forms that may be more susceptible to the body’s digestive acids.


Q: Is Normaflore considered a prescription drug or an over-the-counter supplement?

A: In many international regulatory regions, Normaflore (Bacillus clausii) is classified as an Over-The-Counter (OTC) medicine. This means it typically does not require a doctor's prescription. However, its specific accessibility status can vary based on the local regulations in each country where it is sold.


Q: Is it okay to take Normaflore while taking other vitamin supplements?

A: According to the official drug interactions section of the regulatory documents, there are no specific warnings or documented conflicts established between this medicine and the concurrent use of food, alcohol, or other vitamin supplements.


Q: Can children of all ages use Normaflore?

A: Official regulatory documents provide specific daily dose ranges for use in adults, children/adolescents, and infants. The provision of specific dose ranges indicates that the medicine has regulated use definitions for these age groups.


Q: Has Normaflore been studied in people with irritable bowel syndrome (IBS)?

A: Although the primary regulated indications are for acute gastrointestinal issues, some research and scientific reviews have explored the use of the active ingredient for managing symptoms that relate to Irritable Bowel Syndrome (IBS), such as diarrhea and bloating.


Q: How does Normaflore compare to generic probiotic products sold in stores?

A: The key attributes distinguishing Normaflore are its spore-forming active ingredient and its specific documented resistance to multiple classes of antibiotics. These properties are outlined in regulatory summaries as specific characteristics, such as resistance to acid and antibiotics, that define the product's survival and viability profile.


Q: Is Normaflore known to cause any skin reactions or allergies?

A: Yes, official safety information indicates that hypersensitivity reactions have been reported during post-marketing surveillance. These reactions can involve the skin, presenting as rash, urticaria (hives), or swelling (angioedema).


Q: Can Normaflore be used by people with lactose intolerance?

A: Lactose is not typically an active ingredient or a common excipient in the liquid oral suspension formulation. The complete list of excipients, which outlines all ingredients, is provided in the medicine’s official regulatory patient information for review.


Q: Is Normaflore gluten-free?

A: Gluten is not typically listed as an excipient in the liquid oral suspension formulation. The full list of inactive ingredients is found in the medicine’s official regulatory patient information and may be reviewed for specific sensitivities.


Q: Can people with diabetes use Normaflore?

A: Regulatory documents do not list diabetes as a contraindication. As with any medication, reviewing the full list of excipients for potential carbohydrate content is a standard practice addressed by regulatory patient information.


Q: Is Normaflore sold under different names in other countries?

A: Yes, the product containing the active ingredient Bacillus clausii is marketed under several different trade names globally. It is notably known as 'Enterogermina' in many regions outside of where the 'Normaflore' trade name is used.


Q: Does Normaflore have an expiration date, and is it still effective after that date?

A: The product has a documented shelf life for the intact container, which serves as its expiration date. To maintain spore viability and stability, the official information mandates that the contents of the opened oral suspension vial be used within a short period of time.

How should Normaflore be stored and disposed of?

Storage and Disposal of Normaflore

The storage and disposal instructions for Normaflore (Bacillus clausii oral suspension) are strictly defined by regulatory documents to maintain the stability of the spores.

Storage Category Official Requirement
Temperature Store at a temperature not exceeding 30 C or below 25 C [Source 2.5, 3.2]. Refrigeration is not required [Source 3.4].
Container/Stability Keep the medicine in its original, intact packaging [Source 3.3]. The product should be consumed within a short time immediately after the vial is opened [Source 3.5].
Handling The suspension should be shaken before use [Source 3.5]. Store in a dry place [Source 3.2].
Child Safety Keep this product out of the sight and reach of children [Source 3.1].

For disposal, unused or expired Normaflore must not be discarded in wastewater (flushed down the toilet or poured into a drain) [Source 3.1]. Patients should consult a pharmacist or local waste disposal service for instructions on proper discarding according to local environmental regulations [Source 3.1].

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

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