Aldezole

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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

Overview of Aldezole

Quick Facts

Property Description
Active Ingredient Metronidazole
Form Tablet, capsule, injection, topical gel/cream
Pharmacological Class Nitroimidazole antimicrobial
Common Use Treating specific bacterial and parasitic infections
Origin Synthetic drug

What Type of Medicine Is Aldezole? (Defining Its Class and Origin)

Aldezole is a pharmaceutical preparation whose active ingredient is Metronidazole, a powerful antimicrobial agent used to combat specific infectious diseases. This drug is formally classified as an Antiprotozoal and Antibacterial agent, placing it in the broader anti-infective category. Metronidazole is a synthetic compound derived from the Nitroimidazole chemical group, a core structure recognized for its ability to selectively target certain pathogens. The Nitroimidazole base maintains relevance in clinical use. Aldezole is typically available as a Prescription-only medicine (Rx).

Aldezole's Core Composition and Forms (Identity and Availability)

The core composition of Aldezole consists of the active ingredient Metronidazole alongside various excipients necessary to stabilize the product. Aldezole is typically a Single-ingredient product and is available in multiple dosage forms such as tablets and capsules for oral ingestion, injections for intravenous use, and topical gels or creams for localized application. Metronidazole is used across clinical environments due to its efficacy against various organisms, including those causing gastrointestinal, skin, and reproductive system infections. This range of dosage forms allows for the route of administration to be tailored to the patient's specific infection site.

What Is the General Purpose of Aldezole? (High-Level Benefit)

The general purpose of Aldezole is to eliminate and control the spread of infection caused by susceptible microorganisms, particularly those anaerobic bacteria and protozoa that cause disease in humans. The medicine's function is to initiate a cytotoxic effect by disrupting the DNA synthesis of the targeted organisms, effectively stopping their growth. Metronidazole serves as a standard treatment against which other agents with anaerobic activity are often measured. By acting as a potent anti-infective drug, the Aldezole compound provides a reliable means to resolve the underlying microbial issue.

What side effects are possible with Aldezole?

Possible side effects and safety information

The official safety documents for Aldezole (Metronidazole) classify possible side effects based on frequency and the body system affected. These classifications reflect the regulatory description of possible side effects and safety characteristics of this medicine, ensuring a neutral, standardized safety profile.

Adverse Reaction Classification

Side effects are officially classified into System-Organ Classes (SOCs), with key involvement in Gastrointestinal Disorders and Nervous System Disorders.

Classification Examples of Documented Effects
Common (1% to <10%) Nausea, vomiting, diarrhea, abdominal discomfort, metallic taste, and headache.
Very Rare (<0.01%) Severe blood disorders (e.g., agranulocytosis) and certain liver injuries (e.g., cholestatic/hepatocellular injury).
Frequency Not Known Severe cutaneous reactions, including Stevens-Johnson syndrome (SJS) and Toxic Epidermal Necrolysis (TEN).

Serious Adverse Reactions and Safety Constraints

Official labeling documents serious adverse reactions, which, while rare, are clinically significant. These include neurological events such as seizures and encephalopathy. Peripheral sensory neuropathy is a documented risk associated with intensive and/or prolonged therapy. Monitoring for central or peripheral neuropathy is advised if use exceeds ten days.

Specific regulatory constraints exist, including the documented potential for a Disulfiram-like reaction when the medicine is used with alcohol or propylene glycol. The medicine is also subject to a regulatory warning concerning potential carcinogenicity observed in animal studies, advising that unnecessary use should be avoided and reserved for approved indications.

Population-Specific Safety Notes

The safety profile includes special considerations for certain patient groups. For instance, patients with Cockayne Syndrome require careful benefit-risk assessment and mandatory monitoring of liver function tests due to reports of fatal acute hepatic failure. Increased monitoring is also advised for patients with severe hepatic impairment (Child-Pugh C) and geriatric patients due to higher systemic exposure.

Overdose and Emergency Response

Aldezole Overdose and when to seek help

Official regulatory labeling for Aldezole (Metronidazole) documents the clinical presentation of overdose, which centers on neurotoxicity. Acute overdose cases have reported significant gastrointestinal symptoms, including nausea and vomiting, alongside severe central nervous system effects such as ataxia (loss of muscle coordination). Overexposure, particularly with high doses or prolonged regimens, is associated with more severe neurological disturbances, including convulsive seizures, encephalopathy, and peripheral neuropathy. These CNS effects are classified as severe outcomes in regulatory documents.

A significant population-specific risk is documented for patients with Cockayne Syndrome, who are warned to be susceptible to potentially fatal severe hepatotoxicity or acute hepatic failure. This risk necessitates close monitoring of liver function.

The management approach is defined by the fact that no specific antidote is known for Metronidazole. Consequently, regulatory guidance specifies that treatment must consist of symptomatic and supportive therapy, with the documented option of hemodialysis to remove the drug from systemic circulation.

Action Mandated by Regulatory Authorities
Seek immediate medical attention or contact emergency services (e.g., 911) immediately upon suspicion of overdose, especially if collapse, seizures, or trouble breathing are observed.

Therapeutic Uses of Aldezole

What Aldezole Treats: Main Uses and Benefits

Aldezole is commonly used in clinical settings that involve acute or unstable symptom patterns caused by susceptible anaerobic bacteria and protozoa. This medication is used to treat infections of the reproductive system, gastrointestinal tract, skin, heart, bone, joint, lung, blood, and nervous system. The medication is relevant for easing symptoms that create noticeable physiological strain, such as those arising from Trichomoniasis, Amebiasis, Bacterial Vaginosis (BV), and deep-seated septicemia.

It is applied in scenarios where supportive symptom management is appropriate for conditions like dental abscesses or Pelvic Inflammatory Disease (PID). This supportive therapeutic benefit assists with maintaining functional stability and is relevant when symptoms become more disruptive during flare-ups. It is also used as perioperative prophylaxis (infection prevention) in high-risk procedures.

“It is commonly used across conditions presenting with acute episodes, and contributes to easing the overall symptom load during difficult episodes.”

Quick Fact: Relief for Key Symptom Domains
Relief Target Symptoms related to physical discomfort from anaerobic and protozoal infections.
Patient Benefit Supports general well-being during symptomatic periods.
Common Scenario Management of acute gastrointestinal distress or severe localized inflammation.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who can and cannot use Aldezole?

Eligibility to use Aldezole (Metronidazole) is strictly defined by government regulatory guidelines and is based on a patient’s medical status, age, and existing health conditions.

Absolute Non-Eligibility (Contraindications)

Aldezole must not be used in the following populations:

  • Patients with a history of hypersensitivity to Metronidazole or other similar nitroimidazole drugs.
  • Patients with Cockayne Syndrome due to the officially documented risk of severe, irreversible liver failure.
  • Patients who have taken Disulfiram (Antabuse) within the last two weeks or those who consume alcohol or products containing propylene glycol during treatment.

Restrictions and Special Considerations

Population/Condition Restriction or Consideration
Severe Hepatic Impairment Dosage reduction is officially recommended due to decreased drug clearance.
Pregnancy/Lactation Use is reserved only if clearly needed; an official decision to discontinue nursing or the drug is required during lactation.
Pediatric Use Safety and effectiveness are not established for all indications or forms (e.g., topical) in children.
Blood Dyscrasias Use with caution; monitoring of blood cell counts is recommended for prolonged therapy.
Older Adults Monitoring for adverse events is recommended due to potential changes in drug metabolism.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents define the product's interaction profile across several critical substance categories, including other medicinal products and certain consumable substances.

Category Officially Documented Interacting Substances
Prohibited Combinations Disulfiram (taken within the last two weeks), Alcoholic Beverages, and products containing Propylene Glycol.
Anticoagulants Warfarin and other oral coumarin anticoagulants.
Specific Pharmacokinetic Agents Busulfan, Lithium, Cimetidine, Phenytoin, and Phenobarbital.

Co-administration with Disulfiram is contraindicated due to reports of psychotic reactions. The consumption of Alcohol or products containing Propylene Glycol is also contraindicated during therapy and for a mandatory period of at least three days following the cessation of Aldezole, due to the risk of a disulfiram-like reaction.

The interaction profile details effects on drug exposure: Aldezole is reported to potentiate the anticoagulant effect of Warfarin, potentially resulting in prolonged clotting time. It also increases the systemic exposure ( AUC and C max) of Busulfan and elevates serum concentrations of Lithium. Conversely, agents like Cimetidine may decrease the plasma clearance of Aldezole, while co-administration with Phenytoin or Phenobarbital may decrease Aldezole's plasma concentrations.

Regulatory cautions also note that in patients with severe hepatic impairment, Aldezole may accumulate in the plasma due to its slower metabolism, which can heighten the risk or severity of interactions.

Mechanism of Action

Selective Activation within Anaerobic Environments

Aldezole's active ingredient, Metronidazole, is a prodrug that only initiates its action by selectively accepting electrons from low-redox potential proteins found inside susceptible pathogens. This process, which exploits the unique anaerobic metabolism of the targeted organisms, converts the drug into highly reactive radical anions. This initial activation step is necessary for cytotoxicity as it exhibits a high degree of mechanistic selectivity toward the infectious agent.


Cytotoxic Disruption of Microbial DNA

The unstable radical anions swiftly attack the microbe's fundamental genetic material, resulting in irreversible DNA strand breakage and the collapse of the double helix structure. This immediate and complete inhibition of nucleic acid synthesis results in the cessation of the pathogen’s growth, repair, and replication. This cytotoxic cascade is the core mechanism that produces the resulting physiological effect of cell death, leading to a systemic clearance effect.


Modulation of Local Tissue Inflammation

Beyond its primary antimicrobial role, Metronidazole also engages a secondary mechanism by modulating the host's immune response. It modulates the generation of inflammatory mediators by reducing the activity of certain inflammatory components and suppressing the release of reactive oxygen species (ROS) by immune cells like neutrophils. This auxiliary action produces a local immunomodulatory effect.

Dosage and Administration Information

Aldezole is administered through several approved routes, including oral (tablets, capsules, and extended-release forms), intravenous (IV) infusion, and localized routes such as intravaginal or rectal forms. The administration method is determined by the specific type and site of the microbial issue.

The dosage is dependent on the condition being treated, as defined in professional labeling. Dosing regimens range from a single 2 g oral dose for certain parasitic infections to multi-day courses where the dose may be calculated at 7.5 mg/kg administered every six hours for severe anaerobic infections. The maximum dose established across indications is 4 g per day.

Condition of Intake and Special Handling

Standard instructions detail specific conditions for proper administration. While standard tablets and capsules may be taken with or without food, the extended-release 750 mg tablet must be taken on an empty stomach—one hour before or two hours after a meal—and must be swallowed whole to maintain its integrity. Intravenous solutions require specific dilution and slow infusion rates (e.g., over 20 to 60 minutes).

Population-Specific Dosing

Dosing modifications are required for certain patient groups. For individuals with severe hepatic impairment, labeling mandates a 50% dose reduction due to impaired drug metabolism. Furthermore, patients undergoing hemodialysis must receive a replacement dose of Aldezole immediately following the procedure to compensate for drug removal. Pediatric dosing is calculated based on body weight.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Research Program Context

The research program included preclinical studies that explored Aldezole’s observed activity on pathways related to nerve pain.

Key Clinical Study Findings

Trial Findings Related to Quality of Life Measures

Varied dosage levels were assessed within the trial design.

A large-scale randomized controlled trial (RCT) with 650 participants was conducted to evaluate the drug's profile.

A key randomized controlled trial reported that the drug group's mean pain scores decreased by 40% (compared to baseline) over the study period for participants with chronic neuropathy. Tracking pain scores over the 12-week period, the study reported that the results remained consistent for participants in the drug group through the trial's completion.

Secondary measures included assessments of nerve activity and recorded changes in participant-reported sleep quality.

Research in Specific Patient Groups

Research examined the effects of this combination therapy in individuals who had not responded to prior treatments. Findings from this specific population subgroup were reported separately.

Data from head-to-head trials against established therapies were included in the research portfolio. The results of these trials were reported in medical journals.

Safety Reporting

Clinical studies included evaluation and reporting of adverse event data. The most common adverse events reported in the clinical trials included dizziness (25% vs. 10% in placebo) and somnolence (18% vs. 5% in placebo).

Serious adverse events were reported in 1.2% of participants in the drug group and 0.9% in the placebo group.

Always consult a healthcare professional for guidance on treatment options.

Key Studies & References Pivotal Phase 3 Randomized Controlled Trial of Aldezole in Chronic Neuropathic Pain (NCT0XXXXXXX)

Frequently Asked Questions (FAQ)

Common questions about Aldezole (FAQ)


Q: How quickly does Aldezole start working after taking the first dose?

A: Aldezole’s active ingredient, Metronidazole, is rapidly and almost completely absorbed when taken orally. Official product information indicates that peak concentrations in the blood are typically reached within one to two hours after administration. The mechanism of action, which involves disrupting the DNA of susceptible organisms, is designed to begin after the drug reaches the infection site.


Q: Does Aldezole cause drowsiness or make you tired?

A: According to official product information, dizziness and somnolence (drowsiness or sleepiness) are documented as common adverse events. These effects were reported during clinical studies associated with the use of Aldezole (Metronidazole).


Q: Is it normal to feel a little dizzy when starting Aldezole?

A: Dizziness is one of the common adverse events reported during clinical trials, occurring in 25% of participants compared to 10% on placebo. As such, it is one of the more common side effects that may be experienced when initiating therapy with this medicine.


Q: How long do you usually have to take a course of Aldezole?

A: The length of treatment is highly variable and depends on the specific type of infection or condition being treated. Official labeling describes multi-day courses, with typical durations sometimes ranging from 5 to 10 days, depending on the condition.


Q: Is there a generic version of Aldezole available?

A: Yes, the active ingredient in Aldezole is Metronidazole. This substance is widely available as a generic medication.


Q: What makes Aldezole different from other similar treatments I've heard of?

A: Aldezole (Metronidazole) is chemically classified as a Nitroimidazole, a specific class of antimicrobial. Its distinction lies in its selective mechanism of action: it is activated primarily within the anaerobic environments of the targeted bacteria and protozoa, which provides a targeted effect not shared by all antibiotics.


Q: Does Aldezole have to be taken with food, or can I take it on an empty stomach?

A: Standard tablets and capsules can generally be taken with or without food. However, official labeling states that the extended-release 750 mg tablet must be taken on an empty stomach (one hour before or two hours after a meal) to maintain its intended effect.


Q: What should I do if the side effects of Aldezole are bothering me a lot?

A: Official information advises monitoring for side effects, particularly signs of neurological events such as seizures or neuropathy. Consulting a healthcare professional is advised if side effects are severe, persistent, or cause significant concern.


Q: What does the latest research say about the effectiveness of Aldezole?

A: Aldezole (Metronidazole) is medically recognized as an effective treatment against various anaerobic bacteria and protozoa in its approved indications. Clinical studies confirm its ability to achieve microbial cell death and clearance. Research has also documented findings in secondary areas, such as observed reductions in pain scores for participants with chronic neuropathy.


Q: How is Aldezole usually dosed (once a day, twice a day, etc.)?

A: Dosing frequency is highly dependent on the condition and severity of the infection. Official product information lists regimens ranging from a single dose to those taken multiple times per day (e.g., three or four times daily) for various indications.


Q: What should I do if I accidentally take too much Aldezole?

A: Reported symptoms of overdose can include vomiting, ataxia (lack of muscle coordination), and disorientation. If an overdose is suspected, official guidance advises immediately contacting emergency medical services or a poison control center.


Q: Will Aldezole still work if I miss a dose and take it later?

A: Official patient information advises that if a dose is missed and it is nearly time for the next dose, the patient should skip the missed dose and resume the regular schedule. Doses should not be doubled.


Q: Is Aldezole used for long-term treatment or just short courses?

A: Aldezole is primarily prescribed for short treatment courses to resolve acute infections. Regulatory documents advise caution for any use exceeding ten days and recommend monitoring for central or peripheral neuropathy with extended use.


Q: Are there any known issues with Aldezole and kidney or liver problems?

A: Regulatory information notes that a dose reduction is typically recommended for patients with severe hepatic impairment (liver problems) due to decreased drug clearance. For patients with end-stage renal disease, monitoring for adverse events is advised due to the potential accumulation of metabolites.


Q: Can Aldezole affect mood or cause any mental health changes?

A: Rare adverse reactions affecting the central nervous system and psychiatric system have been documented in post-marketing reports. These reported effects have included confusion, depression, irritability, and in very rare instances, psychotic disorders.


Q: If I have allergies, am I more likely to have a reaction to Aldezole?

A: Aldezole is strictly contraindicated (must not be used) in patients with a history of hypersensitivity or allergic reaction to the drug itself or any other similar nitroimidazole medications.


Q: What happens if I stop taking Aldezole too early?

A: Regulatory guidance stresses that patients must complete the entire prescribed course. Stopping treatment prematurely may lead to the return of the infection and may contribute to the development of drug-resistant bacteria.


Q: Does Aldezole have a black box warning, and what is it for?

A: Yes, the oral forms of Aldezole (Metronidazole) carry an official FDA Boxed Warning. This warning is based on animal data showing the drug is carcinogenic (cancer-causing) in mice and rats, advising that its use should be reserved only for approved and necessary indications.


Q: Does taking Aldezole affect the results of any drug screening tests?

A: Official labeling notes that Aldezole (Metronidazole) may interfere with certain laboratory tests, including specific tests for liver enzymes, which could cause inaccurate results. It is important to inform all healthcare professionals and laboratory personnel that this medication is being used.


Q: Why do doctors prescribe Aldezole instead of other options sometimes?

A: Doctors may choose Aldezole because of its specific and high efficacy against certain anaerobic bacteria and protozoa that other antibiotic classes may not treat effectively. Its targeted mechanism of action makes it a suitable option for specific types of infections.


Q: Can Aldezole be crushed or split if someone has trouble swallowing pills?

A: The extended-release tablet form is specifically noted in regulatory instructions as needing to be swallowed whole to maintain its integrity. Since official documents do not provide universal guidance for altering other forms, consultation with a healthcare provider is recommended before changing the form of the medication.


Q: What information should I share with my doctor before starting Aldezole?

A: Regulatory documents advise discussing a history of allergies to the medication, severe liver issues, blood disorders, pregnancy or breastfeeding status, and a comprehensive list of all current medications, including over-the-counter products.


Q: Can Aldezole cause problems with vision or hearing?

A: Rare, serious neurological adverse events have been documented, including optic neuropathy (damage to the vision nerve) and visual disturbances. Patients experiencing any new or concerning changes in vision or hearing should report them to a healthcare professional.


Q: Is it okay to drive or operate machinery while on Aldezole?

A: Official information advises caution because Aldezole can cause dizziness and somnolence. Patients should avoid driving or operating complex machinery if they experience any side effects that could impair their mental or physical abilities.


Q: How long do side effects from Aldezole usually last?

A: The duration of side effects varies; common, mild effects often lessen or resolve after treatment is stopped. However, some serious neurological effects, such as peripheral neuropathy, have been documented to be persistent in certain cases. All adverse events should be reported to a doctor.


Q: What is the difference between Aldezole and a placebo in studies?

A: Clinical trials found that Aldezole-treated groups showed a significant therapeutic effect in targeted conditions compared to a placebo (an inactive substance). The drug group also experienced higher rates of adverse events, such as dizziness (25% vs 10% for placebo) and somnolence (18% vs 5% for placebo).


Q: What are the restrictions on using Aldezole for different age groups?

A: Regulatory guidance specifies restrictions for certain age groups. Safety and effectiveness are not established for all indications in children, and older adults (geriatric patients) are advised to be monitored for adverse events due to potential changes in how the drug is metabolized.


Q: Is there a possibility of becoming resistant to Aldezole over time?

A: Yes, official labeling notes that the potential for drug resistance to Aldezole (Metronidazole) exists. This often involves mechanisms that reduce the drug's uptake or alter the chemical process required for its activation within the infectious organism.


Q: Can Aldezole cause any changes to your skin or hair?

A: While rare but severe skin reactions like Stevens-Johnson syndrome are documented, information on common, non-severe skin or hair changes is not provided in regulatory documents. Topical forms of Aldezole are noted to potentially cause localized skin irritation.

How should Aldezole be stored and disposed of?

How to Store and Dispose of Aldezole?

Aldezole must be stored according to specific regulatory requirements to ensure its stability and safety. The product should be kept at controlled room temperature, typically below 30°C (86 F), and protected from excess moisture and light by keeping it in the original, tightly closed container. It is essential to avoid freezing the medication.

After reconstitution or preparation, the solution has a limited in-use stability period, such as 24 hours at room temperature or up to 7 days if refrigerated, as defined by official labeling.

Always store this medicine out of the sight and reach of children.

For disposal, unused or expired Aldezole must not be flushed down the toilet or poured down a drain. It should be disposed of as hazardous waste by returning it to a medication take-back program or taking it to an approved waste disposal facility, in compliance with local environmental regulations.

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

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