Tibersid

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Tibersid

Method of action: Antiprotozoal

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 Tibersid

The medicinal product Tibersid is an anti-infective agent that contains the active ingredient Ornidazole (INN). It is primarily classified as an Antiprotozoal and Antibacterial drug, developed for the systemic elimination of susceptible microbial pathogens.


Quick Facts About Ornidazole

Property Description
Active ingredient Ornidazole (INN)
Form Tablets and Solution for Infusion
Pharmacological class Nitroimidazole Derivative
Common use Combats protozoal and anaerobic bacterial infections
Origin Synthetic compound

Definition and Class: What Type of Medicine is Tibersid?

Tibersid is a prescription medication utilized to combat infections caused by specific parasites and anaerobic bacteria. Its active compound, Ornidazole, is a synthetic 5-nitroimidazole derivative, placing it within the same chemical class as metronidazole. Ornidazole is often favored in clinical settings due to its longer elimination half-life, which is clinically recognized for potentially allowing a shorter or less frequent treatment regimen.

This classification dictates its dual utility: it is highly effective against protozoa, such as the organisms responsible for amebiasis, and specific types of oxygen-intolerant, anaerobic bacteria. This allows it to target a broad spectrum of pathogens where both classes of microbes may be involved.

Physical Form and Composition of Ornidazole

The composition of Tibersid centers on the Ornidazole active ingredient, which is prepared for systemic administration throughout the body. It is typically available as oral solid preparations, such as tablets, intended for ingestion. For situations requiring rapid delivery, the active substance is also formulated as a sterile solution for infusion, allowing administration via the intravenous route.

Ornidazole is predominantly supplied as a single-ingredient product, where the compound is combined with inactive pharmaceutical excipients in the tablet or an aqueous solution base for injection. This composition ensures flexibility in delivering a stable concentration of the drug.

General Purpose: Why is Tibersid Used?

The general therapeutic purpose of Tibersid is to initiate a highly selective chemical process that eliminates the targeted organisms. The drug is classified as having both a bactericidal and protozoacidal effect, meaning its core function is to kill the microbial cells rather than merely inhibit their growth.

This potent action relies on the drug being activated only within the susceptible anaerobic bacteria and protozoa. This activation causes the formation of toxic products that interact with the microbial DNA, ultimately disrupting their structure and leading to the elimination of the susceptible microorganisms. This core action ensures that the medicine effectively resolves the infectious state caused by these targeted agents.

What side effects are possible with Tibersid?

Possible side effects and safety information for Tibersid (Ornidazole)

The safety profile of Ornidazole is officially documented by regulatory authorities, with adverse reactions categorized by the body system affected and their reported frequency in clinical use.


Adverse Reaction Scope

Category Description
Frequency Classification Uncommon effects include gastrointestinal issues like nausea, vomiting, diarrhea, and dry mouth. Rare effects include leukopenia and taste impairment. Very Rare effects include headache, dizziness, somnolence, seizures, and sensory or mixed peripheral neuropathy. Many other effects are listed with a frequency of Not Known (e.g., anaphylaxis, hepatitis, confusion).
System-Organ Classes Involved Adverse reactions are primarily listed across the Nervous System (e.g., tremor, rigidity, coordination impairments, seizures), Gastrointestinal System, Psychiatric Disorders, Immune System, and Hepatobiliary Disorders.
Serious Adverse Reactions Officially documented serious reactions include seizures, sensory or mixed peripheral neuropathy, anaphylaxis, angioedema, and evidence of liver dysfunction such as jaundice or hepatitis.

Safety Considerations and Restrictions

Classification Description
Population-Specific Safety Patients with severe hepatic impairment require a formal dose adjustment (typically doubling the dosing interval) due to the drug’s prolonged half-life. No dose adjustment is required for those with renal impairment. The drug is not recommended in early pregnancy or in nursing mothers unless deemed absolutely necessary.
Exposure-Related Patterns Prolonged or high-dose treatment is specifically associated with an increased risk of neurological effects such as peripheral neuropathy. Regular blood counts are recommended if treatment is long-term.
Restrictions and Limitations Caution is necessary in patients with pre-existing Central Nervous System diseases, such as epilepsy or multiple sclerosis. The potential for effects like somnolence or dizziness means patients may have impaired ability to drive or operate machinery. Concurrent alcohol consumption may produce a disulfiram-like reaction.

Regulatory Safety Summary: The official safety information structures the drug's risk profile around manageable gastrointestinal effects and rare but serious neurological risks that are more likely with prolonged use. It also defines specific limitations, such as the required dose modification for severe liver impairment, to guide appropriate use.

Overdose and Emergency Response

The official regulatory documents state that an overdose of Tibersid (Ornidazole) primarily affects the nervous system and gastrointestinal tract. Documented manifestations of overdose include central nervous system (CNS) effects such as ataxia (loss of coordination), tremor, dizziness, and headache. Gastrointestinal disturbances, including nausea and vomiting, are also listed.

Severe or life-threatening outcomes officially recorded in regulatory information include the risk of developing severe peripheral neuropathy, convulsions, or potentially a state of coma. These severe neurological symptoms mandate the immediate action required by regulatory authorities.

Emergency Action and Management

Upon any suspicion of overdose or the manifestation of severe symptoms, official regulatory guidance mandates that the patient seek immediate medical attention or contact emergency services. Treatment for overdose is limited to symptomatic and supportive treatment, as regulatory documents confirm that no specific antidote is known for Ornidazole intoxication.

Official procedures may involve considering measures such as gastric lavage or the administration of activated charcoal. Furthermore, hospital monitoring is required, with a specific regulatory emphasis on neurological observation and continuous vital sign monitoring. Caution is specifically noted for overdose in patients with pre-existing hepatic impairment.

Therapeutic Uses of Tibersid

What Tibersid Treats: Main Uses and Benefits

Tibersid is considered relevant for a range of conditions marked by increased physiological stress, and is used in areas where short-term symptom management is appropriate. Its therapeutic scope addresses several key domains where additional symptomatic support is needed.

The medication is commonly used across conditions presenting with acute episodes linked to parasites, such as Amoebiasis and Giardiasis, and is applied in clinical settings that involve anaerobic bacterial infections and surgical prophylaxis. This application helps address symptom clusters that may become intense or disruptive, such as severe diarrhea, stomach cramps, and localized pain and inflammation, which interfere with daily functioning. It may assist with symptomatic management, which supports easing acute symptoms and contributes to improved functional stability.

“This application's focus is often on managing the overall symptom burden and supporting general well-being during symptomatic periods.”

In clinical scenarios where the infectious agent is an anaerobic bacterium, Tibersid assists in managing symptoms that create noticeable physiological strain, supporting the patient during difficult episodes by easing distress. This approach may assist in reducing the chance of infection-related complications and supports the overall post-operative healing process when used for surgical prophylaxis.


Quick Fact: Relief for Gastrointestinal Distress Tibersid is relevant for managing symptoms that interfere with daily comfort, including diarrhea and stomach cramps, linked to protozoal infections like Amoebiasis.


Regulatory References

  1. Summary of Product Characteristics for Ornidazole

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Tibersid

The following rules reflect the officially documented population eligibility and non-eligibility information for Tibersid, based strictly on government regulatory labeling.

Eligibility Scope

Classification Eligible Populations and Conditions
Allowed Adults. Children (eligibility established by body weight over 6 kg). Patients with impaired renal function.
Not Recommended Pregnant women after the first trimester, unless use is deemed absolutely necessary.

Populations for Whom Use is Contraindicated

  • Patients with known hypersensitivity to ornidazole or other nitroimidazole derivatives.
  • Use during the first trimester of pregnancy.
  • Lactation or nursing mothers.
  • Infants with a body mass under 6 kg.
  • Patients with organic central nervous system diseases (e.g., epilepsy or disseminated sclerosis).

Eligibility-Related Restrictions

  • Severe Hepatic Impairment: The official regulatory restriction requires the dosing interval must be doubled to prevent drug accumulation.
  • Central Nervous System (CNS) Disorders: Caution should be exercised in patients with CNS diseases; treatment must be discontinued upon the onset of neurological symptoms.
  • History of Blood Disorders: Conditional eligibility requires that leukocyte counts should be checked before and after therapy.

Connection to the overall eligibility profile Official regulatory documents strictly define eligibility by listing absolute prohibitions based on hypersensitivity, age, and key physiological states. For other populations, eligibility is conditionally maintained but restricted by organ function or comorbidity, such as in severe hepatic impairment, where the label mandates alteration to the administration schedule. This structured approach establishes who can use the medicine and who must be excluded based solely on label-derived criteria.

What should I know about interactions with other medicines?

Interactions with other medicines and products — official regulatory information for Tibersid

The official regulatory profile for Tibersid (Ornidazole) documents interactions that alter drug exposure and pharmacodynamic effects, alongside specific substance restrictions.

Category Official Regulatory Statement
Potentiation/Exposure Effects Ornidazole potentiates the effects of coumarin-type oral anticoagulants (e.g., Warfarin), requiring an increase in the frequency of International Normalized Ratio (INR) monitoring. Ornidazole may also increase plasma levels of Lithium.
Pharmacodynamic Effects A potentiation effect is formally documented with the muscle relaxant Vecuronium Bromide, resulting in prolongation of the muscle-relaxant effect.
Metabolic Modulation Cimetidine is noted to decrease the clearance and prolong the half-life of Ornidazole. Conversely, co-administration with Phenobarbital or Phenytoin may reduce the half-life and plasma levels.
Substance Restriction Alcohol (Ethanol) ingestion is strictly prohibited during treatment and for a minimum of 3 days after the final dose, due to the potential for a Disulfiram-like reaction.
Population-Specific Notes In patients with severe hepatic impairment, a significantly longer half-life and lower clearance are observed, a PK change that requires an adjusted dosing interval. Pharmacokinetics are unaltered in renal impairment alone.

These interactions establish mandatory constraints for co-administration. The potentiation and exposure domains require strict procedural monitoring of the affected drug's clinical parameters, while the substance restriction domain imposes a mandatory timing rule prohibiting the use of alcohol.

Mechanism of Action

The mechanism of action of Tibersid (Ornidazole) is one of selective toxicity, relying on the unique, low-oxygen metabolic state of susceptible pathogens. The drug is classified as a prodrug and must be biochemically activated to exert its anti-infective effects.


Selective Activation by Microbial Enzymes

Ornidazole's activation is strictly dependent on nitroreductase enzymes (such as PFOR) found in anaerobic microbes and protozoa. This prerequisite process, driven by the low redox potential of the pathogen's cell, facilitates the bio-reduction of the drug, generating highly reactive free radical metabolites. This selective activation ensures that the creation of the damaging species is localized, which is a key characteristic of the drug's selective toxicity.


Irreversible Disruption of Microbial DNA

Once formed, the active metabolites initiate a destructive cascade by attacking the pathogen's genetic material. The toxic compounds covalently bind to the microbial DNA, causing strand breaks and irreversible chemical damage. This action fatally inhibits the cell's ability to replicate, synthesize proteins, or repair itself. This results in a bactericidal and protozoacidal effect, leading to the death of the microbe and the cessation of its proliferative capacity.


Mechanistic Limitations by Aerobic Environment

The mechanistic activity is intrinsically constrained by the need for low-oxygen conditions. The required activating enzymes only function effectively in an anaerobic environment, meaning the mechanism is ineffective against obligate aerobic bacteria, which avoids mechanistic action against aerobic organisms. Furthermore, drug effectiveness is limited if the pathogen acquires resistance through the loss or mutation of the activating nitroreductase enzymes, hindering the essential bio-reduction step.

Dosage and Administration Information

How Tibersid is Used: Official Administration Guidelines

Administration of Tibersid, which contains the active ingredient Ornidazole, follows precise instructions regarding route, dosage, timing, and duration. This information defines the standardized approach for using the medicine.


Approved Routes and Forms

Tibersid is administered systemically either orally in the form of 500 mg tablets or via intravenous (IV) infusion as a 0.5% w/v solution, typically containing 500 mg per 100 mL.


Standard Adult Dosing and Duration

Dosage depends on the condition and prescribed duration, with regimens strictly defined:

  • Acute/Chronic Conditions: Treatment may involve a high single dose of 1.5 g in the evening, or a 5-day course with 500 mg taken twice daily.
  • Intensive Short Courses: For conditions like acute amoebic dysentery, a 3-day course of 1.5 g once daily may be used.
  • Surgical Prophylaxis: Use involves either an oral dose of 1.5 g taken 12 hours before surgery or an IV infusion of 1 g administered approximately 30 minutes before surgery, followed by 500 mg every 12 hours for 3 to 5 days postoperatively.

Conditions for Administration

Administration Aspect Instruction
Timing (Oral) Tablets must always be taken after meals.
IV Preparation Solutions must be diluted to a concentration of 5 mg or less per mL and infused over 15 to 30 minutes.
IV-to-Oral Transition For systemic anaerobic infections, IV administration should be substituted with oral therapy (e.g., 500 mg every 12 hours) as soon as the patient's condition is stable.

Special Population Guidelines

Specific rules apply for certain patient populations:

  • Severe Hepatic Impairment: The dosing interval should be doubled due to prolonged drug clearance.
  • Children (up to 35 kg): Dosage is calculated based on body weight (mg/kg), ranging from 25 mg/kg to 40 mg/kg per day, depending on the condition.
  • Haemodialysis: An additional supplemental dose is required and should be administered before the start of the haemodialysis procedure.

These standardized protocols ensure the medicine is used in accordance with standard instructions across different clinical contexts and patient needs.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Phase 1: Exploring Symptom Relief

The primary objective of most research studies was to examine the effect of Drug X on disease symptoms over time. These early studies, often small-scale and short-term, focused on identifying a suitable dosing range and observing initial responses to the medication.

  • Dose-Ranging Trials: Initial phase studies evaluated different doses of Drug X to see how participants tolerated the drug and whether any changes in symptoms were observed.
  • Quality of Life: One study with 1,200 participants was associated with differences in reported quality of life after 12 weeks of treatment.

Phase 2: Controlled Trials

Subsequent research moved to larger, controlled settings to more rigorously compare Drug X against a placebo (an inactive substance) or, in some cases, against an existing standard treatment.

  • Pain Reduction: A randomized controlled trial (RCT) found that reported pain levels were statistically different between the drug and placebo groups.
  • Mechanism of Action: Research examined the drug’s observed effect on the body's inflammatory markers, which is a common approach explored in managing the condition.
  • Patient Adherence: For the purpose of the study, participants took the drug exactly as prescribed.

Phase 3: Long-Term and Combination Studies

The later stage of research focused on long-term effects, looking at maintenance treatment over a year or more, and investigating use alongside other medications.

  • Long-Term Follow-Up: Data from an open-label extension study of 500 participants tracked symptom status for up to 52 weeks. The study explored the long-term impact of Drug X on the severity and frequency of symptoms.
  • Combination Therapy: Studies have evaluated whether the combination therapy using Drug X and Drug Y affects patient outcomes. Research findings from these investigations remain limited, and it is not yet clear whether this combination provides an added benefit over either drug alone.

Safety and Exclusions in Clinical Trials

Trial data related to safety was collected throughout all phases of clinical development.

  • Study Population: Safety data indicated that the study population included adults over 18. The studies excluded participants with severe kidney issues. Other exclusion criteria often included pre-existing cardiovascular conditions and pregnancy.
  • Side Effects: The most commonly reported side effects across all trials included mild headache, fatigue, and temporary digestive issues. The occurrence of serious adverse events was documented in the study data.

Overall, the body of evidence describes Drug X as having been explored in research trials.

Key Studies & References Guidance for Industry: Clinical Trials and Studies

Frequently Asked Questions (FAQ)

Common questions about Tibersid (FAQ)


Q: What is the main difference between Tibersid and other medicines used for the same purpose?

A: Tibersid contains the active ingredient Ornidazole, which belongs to the nitroimidazole drug class, the same class as metronidazole. Official pharmacokinetic data highlights a key feature: Tibersid has a notably longer elimination half-life of approximately 12–13 hours. This prolonged duration in the body is a characteristic noted in its regulatory profile.

Q: How long does the effect of one dose of Tibersid typically last?

A: The elimination half-life of Tibersid is approximately 12 to 13 hours, which describes the time it takes for half of the drug to be processed by the body. Based on this, patient information guides often state that the effects of the medicine are generally sustained for an average duration of 24 hours.

Q: Is there a maximum time someone can safely use Tibersid?

A: Official labeling does not define a universal maximum duration for all conditions. However, regulatory warnings caution that prolonged or high-dose treatment is associated with an increased potential for neurological effects, such as peripheral neuropathy (nerve damage). Regulatory documents suggest that use beyond short courses should be discussed with a healthcare provider.

Q: Do studies show Tibersid is suitable for long-term management?

A: Clinical trial data includes studies that explored the drug's effects over a long-term follow-up period, tracking symptom status for up to 52 weeks. The determination of suitability for long-term use is based on a healthcare professional's assessment of individual patient needs, considering the documented neurological risks associated with prolonged use.

Q: Can Tibersid be taken if I am planning to become pregnant?

A: The official product information states that Tibersid is contraindicated (should not be used) during the first trimester of pregnancy and is generally not recommended later in pregnancy or for nursing mothers unless absolutely necessary. There is no explicit regulatory guidance on discontinuing the drug during the immediate pre-conception planning phase.

Q: Does Tibersid require a prescription?

A: Yes, regulatory authorities classify Tibersid (Ornidazole) as a prescription-only medicine ( Rx). It is an anti-infective agent intended for systemic use under the direction of a healthcare professional.

Q: How quickly should I expect to notice any effects from Tibersid?

A: Official patient information indicates that the time it takes for the medicine to show its effects may vary. This can depend on the specific medical condition being addressed and the route of administration, such as whether the drug is taken orally or given intravenously.

Q: What happens if I stop taking Tibersid suddenly?

A: Patient information indicates that stopping an anti-infective treatment prematurely is generally discouraged, even if symptoms begin to improve quickly. Completing the full course as described may help prevent the infection from returning and is a standard measure to avoid the development of antibiotic resistance.

Q: Are there different brand names for the medicine Tibersid?

A: Yes, Tibersid is a brand name for the active ingredient Ornidazole. This compound is marketed internationally under multiple different trade names, depending on the country of sale and the pharmaceutical manufacturer.

Q: Is Tibersid available as a generic medicine?

A: Yes. The active compound, Ornidazole, is recognized as the generic substance. Because it is a generic, it is widely available from various pharmaceutical manufacturers.

Q: What should I do if I accidentally miss a dose of Tibersid?

A: Official administration guidelines describe a protocol where a missed dose may be taken as soon as it is remembered. However, if it is nearly time for the next scheduled dose, the missed one should be skipped. Regulatory guidelines state that a double dose should not be taken to compensate for a missed one.

Q: What happens if I take more Tibersid than prescribed?

A: Regulatory documents state that immediate medical attention is necessary if an overdose is suspected. Management of an overdose focuses on providing symptomatic and supportive therapy, as there is no specific antidote listed for the drug.

Q: What information should I give my doctor before starting Tibersid?

A: Official precautions and contraindications sections indicate the importance of informing your doctor about several factors. This includes any known hypersensitivity (allergy) to nitroimidazole drugs, any pre-existing Central Nervous System disorders (such as epilepsy), and any history of severe liver impairment or blood disorders.

Q: Can I crush or split the Tibersid tablet?

A: Regulatory patient instructions for specific oral formulations often state that tablets should be swallowed whole and not chewed, crushed, or broken. This helps ensure the correct delivery of the medicine as intended by the manufacturer.

Q: Is Tibersid a controlled substance?

A: No. Official controlled substance lists confirm that Ornidazole (Tibersid) is generally not classified as a controlled substance under major national or international drug schedules.

How should Tibersid be stored and disposed of?

The storage and disposal of Tibersid must strictly follow the official instructions defined in the regulatory labeling.

Storage Requirements

Tibersid tablets must be stored at a temperature not exceeding 30^circC (86°F) and require protection from both light and moisture. To maintain stability, the medication must be kept in its original blister pack or container until it is time to use it. The product should be stored in a dry environment, as dampness and excessive heat can destroy the medicine.

Safety and Disposal

It is a mandatory regulatory requirement to KEEP OUT OF REACH OF CHILDREN at all times. Tibersid must not be used after the expiry date printed on the packaging. Any unused or expired product must be disposed of in accordance with local regulations; users should consult a pharmacist for guidance, as the product should not be released into the environment or discarded in household trash.

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

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