Metronidazol STADA

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Overview of Metronidazol STADA

Quick Facts

Property Description
Active ingredient Metronidazole
Form Tablets, solution for infusion, suppositories, cream, gel, etc.
Pharmacological class Anti-infective agent, Antiprotozoal agent
General purpose Elimination of anaerobic bacteria and protozoal infections
Origin Synthetic chemical (Nitroimidazole derivative)

Classification, Active Substance, and Identity

Metronidazol STADA is a medication whose identity is defined by its sole active substance, Metronidazole, a synthetic chemical belonging to the nitroimidazole derivative family. This compound is fundamentally classified within the pharmacological class of anti-infective agents and, more specifically, as an antiprotozoal agent. Metronidazole is a selective anti-infective agent used for systemic and topical applications. The formulation is made available in multiple dosage forms, facilitating various administration methods, including film-coated tablets, solution for infusion, suppositories, vaginal ovules, cream, gel, and oral suspension. These different forms permit either systemic treatment throughout the body or targeted topical application, ensuring the single active substance product can be used as medically required.

What is the Role of Metronidazole in Therapeutics?

The primary role of Metronidazole within the anti-infective class is its function as a selective and potent bactericidal agent against specific categories of pathogens. Its general purpose is to eliminate infections caused by anaerobic bacterial infections and certain protozoal infections. This therapeutic action is achieved through the drug's unique nature as a prodrug that becomes activated only inside these susceptible microorganisms. The compound is clinically recognized for its essential use in treating infections where pathogens thrive in environments with low or absent oxygen, establishing Metronidazole as a key compound in these therapeutic niches.

Understanding the Active Substance: Metronidazole's Selectivity

The active substance, Metronidazole, achieves its therapeutic effect through selective antimicrobial action on organisms that thrive in low-oxygen environments. Unlike many traditional antibiotics, the drug's mechanism relies on the target organism's own internal processes to chemically transform the molecule, creating cytotoxic compounds that damage the pathogen's DNA. This distinction, rooted in its nitroimidazole derivative structure, ensures that the drug is preferentially active against the specific anaerobic bacteria and protozoa it is designed to eliminate, confirming its role as a targeted anti-infective agent for both systemic and topical applications.

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What side effects are possible with Metronidazol STADA?

Possible Side Effects and Safety Information

Metronidazol STADA's official safety profile is defined by adverse reactions categorized by frequency and the physiological systems affected, as documented by regulatory authorities (EMA, FDA). The most characteristic adverse reaction is a metallic or unpleasant taste, which is classified as Very Common. Common adverse effects often involve the Gastrointestinal Disorders system, including nausea, vomiting, diarrhea, abdominal pain, and events like headache and dizziness.


Regulatory Classification of Adverse Reactions

Classification Examples of Documented Effects
Common Nausea, headache, dizziness, abdominal discomfort
Uncommon / Rare Peripheral neuropathy, hypersensitivity reactions, psychotic disorders, convulsions

Adverse reactions are also classified by System-Organ Classes, covering effects on the Nervous System Disorders (e.g., peripheral neuropathy, seizures), Blood and Lymphatic System Disorders (e.g., neutropenia, agranulocytosis), and Hepatobiliary Disorders (liver function abnormalities).

Serious adverse reactions are rare but explicitly documented and include encephalopathy, severe cutaneous reactions (Stevens-Johnson syndrome), and acute pancreatitis. Neurological events like peripheral neuropathy and convulsions are officially noted to be associated with prolonged administration or high doses of the medicine. The label also contains a key safety restriction: the prohibition of alcohol consumption during treatment and for a period afterward due to the documented risk of a disulfiram-like adverse reaction. Specific safety considerations apply to patients with severe hepatic impairment due to reduced clearance.

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Overdose and Emergency Response

The official regulatory documentation on metronidazole overdose focuses on acute symptoms and mandatory emergency actions. Suspected overexposure may present with documented gastrointestinal effects such as nausea and vomiting. Of greater concern are dose-dependent neurotoxic manifestations, which include ataxia (loss of coordination), and in severe cases, the potential for convulsive seizures and signs of peripheral neuropathy. Regulatory records state that single oral doses of up to 15 grams have been documented in cases of overexposure.

Individuals who suspect they have taken too much of this medicine must seek immediate medical attention and contact a poison control center or emergency room at once. Emergency services must be called immediately if the affected person has collapsed, had a seizure, has trouble breathing, or cannot be awakened. The official prescribing information confirms that no specific antidote is available for metronidazole overdose. Therefore, management is strictly limited to symptomatic and supportive therapy, though regulatory bodies note that hemodialysis is an effective procedure for rapid drug removal. Population-specific considerations include the risk of accumulation and encephalopathy in patients with severe hepatic impairment, and the documented risk of severe hepatotoxicity in patients with Cockayne Syndrome.

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Therapeutic Uses of Metronidazol STADA

What Metronidazol STADA Treats: Main Uses and Benefits

Metronidazol STADA is an antimicrobial agent primarily used for its activity against anaerobic bacteria and specific protozoal infections. This therapeutic scope is commonly applied in conditions presenting with systemic or localized discomfort. The medicine is used across therapeutic domains, including for infections like septicemia, dental abscesses, bacterial vaginosis, amebiasis, and specific instances of Clostridioides difficile colitis.

Therapeutic Benefit and Symptom Management

Metronidazol STADA is relevant in contexts involving heightened systemic burden. It is commonly used when short-term symptomatic assistance is needed for acute episodes of deep-seated infection or distressing manifestations in the gastrointestinal and genitourinary tracts. The application is relevant for easing symptoms that create noticeable physiological strain, such as fever, abnormal discharge, and localized pain.

“The treatment helps address symptom clusters that may become intense or disruptive, and may offer supportive relief that assists patients with difficult episodes.”

This supportive management contributes to easing the overall symptom load and helps maintain a sense of stability when symptoms are more noticeable.


Quick Fact

Property Description
Quick Fact: Relief for Inflammatory Symptoms and Functional Strain
Common Use Context: Applied in clinical settings that involve acute or unstable symptom patterns, including those where additional management of discomfort is required.
Patient Benefit: Provides support that helps ease the overall symptom load, relevant for symptoms related to systemic imbalance and inflammatory states.

Regulatory References

  1. NIH MedlinePlus overview of Metronidazole
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Eligibility and Restrictions for Use

Who Can and Cannot Use Metronidazol STADA? (Eligibility Profile)

This section outlines the formal eligibility and non-eligibility information for metronidazole, strictly based on authoritative government regulatory documents.


Absolute Contraindications

Metronidazole must not be used by individuals with the following conditions or exposures, as specified in official labeling:

  • Hypersensitivity to metronidazole or any other nitroimidazole derivative.
  • Diagnosis of Cockayne syndrome, due to the risk of fatal hepatotoxicity.
  • Concurrent or recent ingestion of alcoholic beverages or products containing propylene glycol (prohibited during treatment and for at least three days afterward).
  • Recent use of disulfiram (within the last two weeks).

Restricted and Conditional Use

Use of this medicine requires specific caution or dose adjustment in certain populations:

Population/Condition Eligibility Status
Severe Hepatic Impairment Requires a 50% dose reduction and close monitoring.
First Trimester of Pregnancy Generally not recommended or contraindicated (especially for trichomoniasis).
CNS Disorders Use with caution due to the risk of neurological aggravation.
Pediatric Patients Established use for specific infections (e.g., amebiasis); dosage is weight-based.
Breastfeeding Requires a decision to discontinue nursing or discontinue the drug; temporary interruption may be necessary after high doses.
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What should I know about interactions with other medicines?

Interactions with other medicines and products

Metronidazol STADA's active substance, Metronidazole, has officially documented interaction patterns that influence the clearance and activity of co-administered substances, as established by regulatory labels.

Contraindicated and Restricted Combinations

Co-administration with Disulfiram is formally contraindicated due to the reported risk of acute psychotic reactions and confusion; a regulatory timing constraint states Metronidazole must not be taken within two weeks of Disulfiram. Consumption of alcohol and products containing Propylene Glycol is restricted during therapy and for at least three days (72 hours) afterward, as it may induce a disulfiram-like reaction.

Drug-Drug Interaction Classification

Interaction Type Interacting Substances and Official Effect
Exposure Modification Cimetidine (CYP inhibitor) may decrease plasma clearance, prolonging Metronidazole's half-life. Phenytoin or Phenobarbital (CYP inducers) may accelerate elimination, leading to reduced plasma levels of Metronidazole.
Anticoagulant Potentiation Warfarin and other coumarin anticoagulants may have their effects potentiated, resulting in a regulatory outcome of prolonged prothrombin time (INR).
Toxicity Risk Increase Metronidazole has been reported to increase the plasma concentrations and toxicity risk of Busulfan and Lithium. It also reduces the clearance of 5-Fluorouracil, which can result in increased 5-Fluorouracil toxicity.

Population-Specific Notes

The interaction profile includes the note that patients with severe hepatic impairment may metabolize Metronidazole slowly, leading to the risk of drug accumulation in the plasma, as documented in prescribing information.

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Mechanism of Action

Selective Activation and Targeted DNA Disruption ️

The drug functions as an inert prodrug that is activated only when chemically reduced by specific microbial enzymes, such as ferredoxin, within low-oxygen environments. This unique reductive activation generates highly reactive nitro-radical anions that cause irreversible DNA strand breaks and fragmentation. This core mechanism results in the irreversible inhibition of nucleic acid synthesis and structural destabilization of the pathogen's DNA, leading to cellular mortality (bactericidal and protozoacidal effects).


Constraint by Oxygen Tension

The drug's mechanism is fundamentally constrained by the local concentration of oxygen, which acts as a competing electron acceptor to the drug's 5-nitro group. High oxygen tension suppresses the necessary reductive activation process. This confines the drug's destructive effect to organisms possessing the required low-potential electron carriers in anaerobic settings, contributing to selective toxicity over human aerobic cells due to the host's lack of the necessary oxygen-sensitive reductase enzymes.


Modulation of Local Inflammation (Topical)

A secondary mechanism, primarily observed with topical use, involves the modulation of local inflammatory pathways. This action is achieved by interfering with the generation of Reactive Oxygen Species (ROS) and potentially inhibiting the accumulation and motility of neutrophils in the affected tissue. This physiological modulation influences the local release of inflammatory mediators and limits cellular accumulation, resulting in a modulation of the local inflammatory response.

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Dosage and Administration Information

How to use Metronidazol STADA: Official Administration Guidelines

Metronidazol STADA is used according to specific, standardized instructions based on the official routes of administration and dosage forms, which include oral tablets/suspensions, intravenous (IV) infusion, and topical/vaginal applications.

Dosing and Frequency

Instruction Detail
Route of Administration Oral, Intravenous (IV) infusion, Topical, and Vaginal/Rectal routes are officially approved.
Standard Dosing Systemic treatment typically uses fixed doses (e.g., 250 mg to 750 mg) administered multiple times daily, or a weight-based regimen of 7.5 mg/kg for maintenance. The maximum daily dose is 4 g.
Treatment Duration Course length commonly ranges from 5 to 10 days for most systemic infections; therapy must be completed regardless of early symptom improvement.

Administration Conditions

Oral administration is subject to specific timing rules based on the formulation: immediate-release tablets may be taken with food, but extended-release tablets must be taken on an empty stomach, either 1 hour before or 2 hours after a meal. Extended-release tablets must be swallowed whole and must not be crushed, split, or chewed.

Population-Specific Use

Official labeling specifies dosage adjustments for certain populations. A 50% dose reduction is recommended for patients with severe hepatic impairment (Child-Pugh C). Pediatric dosing is based on body weight (mg/kg). For patients undergoing hemodialysis, dose supplementation may be considered following the dialysis session to account for drug removal.

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Recent Clinical Evidence

Metronidazol STADA: Recent Clinical Evidence

This overview summarizes the research base for Metronidazol, focusing on the types of studies conducted, the patient groups examined, and documented areas of uncertainty, based on regulatory and scientific literature.


Evidence for Use in Systemic Anaerobic Bacterial Infections

Research exploring the use of Metronidazol for serious, deep-seated infections—such as intra-abdominal abscesses and certain types of septicemia—primarily consists of Randomized Controlled Trials (RCTs) and Systematic Reviews. Researchers examined outcomes related to physical discomfort and systemic imbalance, including tracking changes in infection-related signs and the microbiological clearance measurements of specific pathogens. Findings describe patterns related to clearance measurements observed when the medicine was studied, though research highlights that when observed as a single agent for some infection sites, the findings were mixed.


Evidence for Use in Bacterial Vaginosis and Clostridioides difficile Colitis

The evidence base for Bacterial Vaginosis (BV) is built on RCTs that compared the medicine against alternative treatments, focusing on the measurement of microbiological clearance and tracking decreased symptom scores. Studies consistently reported a high frequency of recurrence, which remains a focus of research. For C. difficile colitis, the research includes RCTs and is supported by inclusion on essential medicines lists. Studies focus on patterns related to measurements of clinical change, and research is ongoing to evaluate its performance relative to alternative therapeutic options for severe cases.


Evidence for Use in Protozoal Infections (Amebiasis)

The research base for conditions like amebiasis includes Comparative Studies that examined parasite clearance measures from the body in both adult and pediatric patients. This research contributes to the broader evidence landscape, leading to authoritative bodies including the medicine on essential medicines lists for this condition. Uncertainty stems from older comparative evidence where methodological details may be uncertain, and limited data comparing the agent to other compounds studied in recent decades.


Long-Term Studies and Research Gaps

The majority of evidence focuses on short-term changes and outcomes of the acute treatment phase, meaning long-term effects are not fully established across all indications. Data for certain special populations, such as those with complex underlying diseases or instances of impaired organ function, remain insufficient. Furthermore, evidence quality varies across studies, and comparative evidence against newer agents is still emerging, meaning its full relative positioning remains an area of ongoing research.

Key Studies & References

  1. Metronidazole (MedlinePlus Drug Information)
  2. Systematic Review of Metronidazole for Anaerobic Infections (Representation of underlying RCT/Meta-analysis base)
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Frequently Asked Questions (FAQ)

Common questions about Metronidazol STADA (FAQ)


Q: Is it true that Metronidazol STADA is sometimes used for dental infections?

A: Official documents indicate that Metronidazol is used to address serious infections caused by susceptible anaerobic bacteria. This spectrum of activity covers a range of infections, including those involving the bone and joints, where these types of bacteria thrive. Due to this general classification, the active substance is employed in the treatment of various infections, which can include those involving the oral cavity.


Q: What is the difference between Metronidazol tablets and the vaginal gel?

A: The active substance Metronidazole is available in various forms to suit different medical needs. According to the official product information, tablets are typically intended for systemic treatment, which means the medicine is intended to act throughout the body to address bacterial and protozoal infections. In contrast, vaginal preparations like gels or ovules are typically indicated for targeted local treatment of conditions like Bacterial Vaginosis.


Q: Can Metronidazol STADA change the color of urine?

A: The official safety profile reports that Metronidazol may cause the urine to become darker or have a reddish-brown color. This change is attributed to a drug metabolite and is listed as a rare effect. The discoloration is generally considered a temporary effect that typically resolves after the treatment course is completed.


Q: Are there any specific foods or drinks to avoid other than alcohol when on this medication?

A: Regulatory warnings state that the consumption of alcohol and products containing Propylene Glycol is formally restricted during therapy and for a specified time afterward. Avoiding these substances is necessary because consuming them with Metronidazol can potentially trigger a severe disulfiram-like reaction. The official information does not list restrictions for other specific foods or drinks.


Q: If I miss a dose of Metronidazol STADA, what is the general guidance?

A: General patient information outlines a procedure for a missed dose, which typically involves taking the dose when remembered unless it is nearly time for the next dose. This general principle serves to maintain a consistent concentration of the medicine in the body. Following the specific instructions provided on the patient leaflet or by a prescriber is necessary.


Q: Does Metronidazol STADA cause tiredness or fatigue?

A: Official safety information indicates that while common side effects include nervous system effects such as headache and dizziness, less frequently reported effects associated with the active substance include unusual tiredness, weakness, or somnolence (drowsiness). These effects are documented in official sources as rare or uncommon occurrences in some patients.


Q: Can Metronidazol STADA affect sleep?

A: The official safety profile for the active substance reports several types of nervous system disorders. Although specific insomnia is not consistently listed as a common effect, related adverse reactions like somnolence (drowsiness) are documented. The documented nervous system effects may be associated with indirect effects on sleep patterns.


Q: Can Metronidazol STADA be prescribed to the elderly?

A: Official guidelines indicate that Metronidazol can be prescribed to geriatric patients. However, the regulatory documents recommend close monitoring for adverse events in older adults. This recommendation is related to observations that clearance of the drug’s active metabolites may be slower in older patients.


Q: Is it common to feel anxious or irritable when taking this medicine?

A: Official safety information reports rare psychiatric disorders associated with the active substance, including confusion, hallucinations, and psychotic disorders. While general feelings of anxiety or irritability are not explicitly listed as common events, the documented nervous system and psychiatric effects may potentially cover related symptoms like anxiety or irritability.


Q: Is there a maximum recommended time frame for a course of Metronidazol STADA?

A: The official label warns that neurological events, such as peripheral neuropathy, have been associated with both high doses and prolonged courses of the medicine. While there is no single, explicitly stated maximum duration for all patients, this warning suggests the risk of these effects may increase the longer the medicine is administered. The duration of treatment is based on the specific infection and is determined by a healthcare provider.


Q: Does Metronidazol STADA interact with birth control pills?

A: Official drug interaction lists note that metronidazole may reduce the effectiveness of some oral contraceptives (birth control pills). This interaction applies specifically to pills containing ethinyl estradiol. Official guidance indicates the need to consult a healthcare provider regarding alternative or additional birth control methods during treatment.

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How should Metronidazol STADA be stored and disposed of?

How to Store and Dispose of Metronidazol STADA

To ensure the stability of Metronidazol STADA tablets, regulatory requirements state that the product must be stored correctly. Store the medicine in its original container or package and keep the container tightly closed where applicable.

Storage Conditions

Requirement Specification
Temperature Do not store above 25 C.
Protection Store in the original container/package.
Shelf Life Defined by the specific packaging (e.g., up to 3 years for some blisters).

Disposal Instructions

Metronidazol STADA tablets do not have special requirements for disposal beyond general procedures. Unused medication or waste material must be disposed of in accordance with local requirements to protect the environment.

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

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