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Альдазол

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Альдазол

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Method of action: Anthelmintic

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.

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Overview of Альдазол

Property Description
Active ingredient Albendazole
Form Oral tablet or suspension
Pharmacological class Benzimidazole anthelmintic
Common use Treatment of parasitic worm infections
OTC/Rx Status Prescription only (in most regions)

Альдазол is a brand-name medication containing the active ingredient albendazole, which is classified as a benzimidazole anthelmintic. This class of drugs is specifically designed to kill or expel various parasitic worms that infect humans, including certain roundworms, tapeworms, and flukes, making it a globally recognized broad-spectrum agent.

Medical Recognition and Use

Albendazole's efficacy is supported by extensive pharmacological studies. The medication is categorized as an essential medicine due to its role as a safe and effective treatment for helminth infections worldwide. This classification establishes the drug as a core component of a basic healthcare system.

Albendazole is utilized in treating specific, severe systemic parasitic conditions, such as neurocysticercosis and hydatid disease. Its clinical application includes the management of complex, life-threatening infections as well as common intestinal parasites.

Differentiating Features

Альдазол, as a brand, typically offers both oral tablets and an oral suspension form. The availability of the suspension is a key feature, making the medication suitable for treating children or patients who have difficulty swallowing tablets. The drug is generally available by prescription only in many countries due to the necessity of clinical diagnosis and monitoring during therapy.

Regulatory References

  1. World Health Organization
  2. Model List of Essential Medicines
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What side effects are possible with Альдазол?

Possible side effects and safety information

The safety profile of Albendazole, the active ingredient in Альдазол, is structured by regulatory documents based on the potential for systemic effects and the frequency of adverse reactions. The profile emphasizes the need for active monitoring throughout therapy.


Frequency-Classified Adverse Reactions

Side effects are categorized by frequency as documented in official prescribing information:

  • Common (ge 1/100 to < 1/10): Commonly documented reactions include headache, gastrointestinal symptoms such as abdominal pain, nausea, and vomiting, and reversible elevations of liver enzymes (transaminases).
  • Uncommon (ge 1/1,000 to < 1/100): Reported effects include dizziness/vertigo and reversible alopecia (hair thinning or loss).

Serious Adverse Reactions and Safety Constraints

The regulatory safety profile requires caution due to the documented risk of serious events, particularly with higher doses and longer durations of use. Serious adverse reactions officially listed include severe Bone Marrow Suppression (e.g., pancytopenia, agranulocytosis) and significant Hepatotoxicity (e.g., hepatitis, acute liver failure). Severe cutaneous reactions, such as Stevens-Johnson syndrome, are also documented as very rare events.

To mitigate these risks, regulatory labels mandate mandatory monitoring of Liver Function Tests (LFTs) and Complete Blood Counts (CBCs) before starting and periodically during treatment. Furthermore, the medicine is contraindicated in pregnancy due to official findings of teratogenicity in animal studies, requiring pregnancy testing and effective contraception for women of childbearing potential, which defines a critical population-specific constraint.

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Overdose and Emergency Response

Overdose with Альдазол (albendazole) is officially associated with the potential for severe, system-specific toxicities. Documented manifestations of excessive exposure include the onset of pancytopenia, a severe reduction in all blood cell types, and signs of hepatic toxicity, such as elevated liver enzymes (transaminases). Other recorded clinical findings associated with severe exposure include fever, rash, and alopecia.

The most serious outcomes described in regulatory documents involve life-threatening conditions. These include acute liver failure and severe bone marrow suppression, such as aplastic anemia and agranulocytosis. Immediate medical attention is required for the onset of neurological manifestations, including seizures or signs of increased intracranial pressure.

The official regulatory profile mandates specific emergency actions. Patients must seek emergency medical attention immediately if any severe manifestations occur. Management is guided by the official statement that no specific antidote is known for overdose. Therefore, the required clinical strategy centers on symptomatic and supportive treatment. This includes the mandated monitoring of blood cell counts and liver enzyme levels due to the inherent risk of severe hematological and hepatic injury. Patients with pre-existing liver disease are officially noted as being at a higher risk for these severe outcomes.

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Therapeutic Uses of Альдазол

What Альдазол Treats: Main Uses and Benefits

This medication is commonly used in conditions presenting with systemic or localized discomfort related to parasitic presence, especially when they involve areas beyond the intestines. Its uses are considered relevant for conditions such as neurocysticercosis and hydatid disease. These are established indications for treatment.

Альдазол is also applied to help manage various intestinal parasitic worm infections that create noticeable physiological strain in the digestive tract. For these conditions, the treatment may assist with easing symptoms related to digestive distress, cramping, and general systemic imbalance, which supports maintaining functional stability during symptomatic periods.

“This therapy is commonly used to help manage symptoms associated with acute or disruptive episodes and support the easing of physical discomfort.”


Quick Fact: Relief for Digestive and Systemic Symptoms

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Eligibility and Restrictions for Use

Official Eligibility Profile: Who Can and Cannot Use Альдазол

Official regulatory documents establish strict criteria for the use of Альдазол (Albendazole), focusing on patient status and specific pre-existing conditions.

Contraindicated Populations (Must Not Use) Restricted/Conditional Use Populations
Known hypersensitivity to albendazole or benzimidazole compounds. Patients with pre-existing hepatic disease or bone marrow suppression (require strict lab monitoring).
Pregnant women (especially during the first trimester, due to fetal risk). Women of childbearing potential (must obtain a negative pregnancy test and use effective contraception during and for one month after treatment).

Age and Other Restrictions:

  • Children under 2 years of age are generally not recommended for treatment, as safety and efficacy data are limited or not established for this demographic.
  • Use in patients with specific conditions like retinal cysticercosis or pre-existing severe bone marrow suppression requires careful consideration and heightened clinical monitoring, as discontinuation may be necessary if blood cell counts or liver enzymes are significantly affected.

The drug must be immediately discontinued if pregnancy occurs during treatment.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

Impact on Albendazole Exposure

Co-administration with certain medicinal products significantly alters the plasma concentrations of albendazole sulfoxide, the active metabolite. Dexamethasone and the anthelmintic Praziquantel are documented to increase the exposure of this metabolite by approximately 56% and 50%, respectively. Cimetidine may similarly increase concentrations. Conversely, anti-convulsant medicines such as Phenytoin and Phenobarbital are known to act as metabolic inducers, which can decrease the concentration of the active metabolite in the plasma.

Pharmacodynamic and Other Drug Interactions

Due to the drug’s potential for bone marrow suppression, co-administration with other myelosuppressive agents carries a risk of additive toxicity. Additionally, albendazole has been shown to induce cytochrome P450 1A (CYP1A); therefore, co-administration with Theophylline is noted as requiring monitoring of theophylline plasma concentrations.

Food and Population Constraints

For systemic parasitic infections, administration with food, particularly a fatty meal, is an officially documented constraint necessary for adequate drug absorption and systemic bioavailability. Separately, the label notes that patients with hepatic impairment (including liver disease or hepatic echinococcosis) are at increased risk for interaction-related bone marrow suppression.

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Mechanism of Action

The action of the drug involves a multi-step pharmacodynamic mechanism that specifically targets critical structures and energy pathways within the parasitic worm, leading to profound functional incapacitation of the parasitic organism.

Molecular Targeting of Parasitic beta-Tubulin

The mechanism begins with the selective binding of the molecule to the boldsymbolbeta-tubulin subunit within the helminth. This molecular interaction inhibits the polymerization of beta-tubulin, which prevents the assembly of cytoplasmic microtubules. These microtubules serve as key structural components of the parasite's cells. The drug exhibits a profound preferential binding to the parasite's tubulin over the host's, allowing for targeted disruption. This action initiates the destructive cascade by compromising the structural integrity of the parasite's absorptive cells.

Metabolic Collapse and Energy Pathway Blockade

The resulting loss of cellular structure severely impairs the parasite's ability to absorb vital nutrients, particularly glucose. This blockade of the nutrient uptake pathway, coupled with secondary inhibition of helminth-specific enzymes, leads to the rapid depletion of glycogen stores and total failure of ATP production. The systemic energy deficit and functional failure rapidly lead to cessation of critical functions within the parasitic organism.

Mechanism Limitations

The drug’s mechanism is subject to limitations in certain contexts; for instance, against some species, mutations in the beta-tubulin gene can emerge, leading to drug resistance by reducing the binding affinity. Furthermore, in certain chronic systemic infections, the action is often primarily parasitostatic (inhibiting growth) rather than universally parasitocidal (killing), which is characterized by a slower-acting mechanism in those specific infections.

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Dosage and Administration Information

Administration Instructions for Albendazole

Albendazole (known in some regions as Альдазол) is an oral-route medication provided as a 200 mg tablet. There are specific protocols regarding dosing, timing, and treatment duration for proper use, particularly for indications such as neurocysticercosis and cystic hydatid disease.

Administration Detail Description
Route of Administration Oral (PO)
Administration Timing Taken with food (specifically, a meal).
Tablet Preparation Tablets may be crushed or chewed and swallowed with water if the patient has difficulty swallowing the tablet whole.
Frequency Dosing is typically twice daily (BID).

Standard Dosage and Duration (Based on ≥ 60 kg body weight):

Indication Dose Duration
Neurocysticercosis 400 mg twice daily 8 to 30 days
Hydatid Disease 400 mg twice daily 28-day cycle, followed by 14 drug-free days, repeated for 3 total cycles

Patients weighing less than 60 kg are dosed at 15 mg/kg/day divided into two daily doses, not to exceed a maximum total daily dose of 800 mg. For females of reproductive potential, a negative pregnancy test is typically obtained prior to starting, and effective contraception is used throughout the treatment period.

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Recent Clinical Evidence

Research evidence / Overview of studies for Альдазол

Evidence for Use in Systemic Parasitic Conditions (Neurocysticercosis and Hydatid Disease)

Research has been conducted to examine the use of albendazole in conditions where parasitic cysts develop in organs beyond the digestive system. For conditions involving the central nervous system (Neurocysticercosis), the evidence base includes Randomized Controlled Trials (RCTs) and systematic reviews. Studies were designed to examine variables related to cyst status using medical imaging, and also tracked episodic changes such as seizure patterns in the observed populations. Studies reported measurements showing patterns where cyst structures evolved or disappeared across several trials, however, findings for subsequent seizure frequency were mixed across different study designs.

For the complex condition known as Hydatid Disease, research was explored in both RCTs and longer observational cohort studies. These studies examined the measured data related to the viability and morphological changes of cysts in sites like the liver and lungs, often measuring recurrence rates over time. Findings describe patterns of change measured in cyst structures when studied in comparison to other groups, including those with no intervention.

Research Focus: Assessing Parasite Status in Studies

Researchers primarily used tools like ultrasound, CT, or MRI scans to record the size, appearance, and viability of the cysts. This approach was used to document the changes measured during the study period and contribute to the understanding of the short-term evolution of the cyst structures within the research context.


Evidence for Use in Intestinal Parasitic Worm Infections

The evidence base for the use of albendazole in common intestinal parasitic worm infections is substantial, primarily consisting of numerous community-based trials and large-scale RCTs conducted in endemic regions. Research examined specific outcomes: the Parasitological Cure Rate (defined as the absence of eggs from stool in the sample population) and the Egg Reduction Rate (ERR) for species such as Ascaris and hookworm. Studies report measurements that indicated a large proportion of clearance for certain species in the observed populations. However, findings indicate that clearance rates for Trichuris trichiura were generally reported as lower and less consistent when compared to the patterns observed for the other studied species.


What is Still Uncertain About Альдазол

Several research limitations are noted across the entire body of evidence. Evidence quality varies across studies, and findings were mixed regarding the long-term patterns of seizure recurrence. Follow-up durations were often limited, meaning there is limited information for long-term outcomes such as the sustained impact on functional limitations. Research to date has largely focused on immediate parasitological or imaging outcomes, with limited information available for long-term patient-reported outcomes describing perceived discomfort or overall systemic balance.

Key Studies & References

  1. Albendazole versus Praziquantel in the Treatment of Neurocysticercosis: A Meta-analysis of Comparative Trials - PLOS Neglected Tropical Diseases
  2. WHO Model List of Essential Medicines - Application review Albendazole – mebendazole - praziquantel (2021)
  3. Albendazole - StatPearls - NCBI Bookshelf - NIH (General Overview of Efficacy/Limitations for STH)
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Frequently Asked Questions (FAQ)

Common questions about Альдазол (FAQ)


Q: Does Альдазол treat all different kinds of parasites?

According to official indications, Альдазол is a broad-spectrum drug designed to treat various parasitic infections. However, its effectiveness is specifically limited to certain parasitic worms, such as certain roundworms, tapeworms, and flukes, and is not indicated for every kind of parasite. The treatment is focused only on the specific species listed in the regulatory documents.


Q: Can Альдазол cause temporary changes in vision or dizziness?

Dizziness is listed in the official documents as a reported side effect of the medicine. In specific cases where the drug is used to treat infections in the brain (neurocysticercosis), temporary neurological symptoms like changes in vision, seizures, or headache may occur. These symptoms are related to the inflammation caused by the parasite dying inside the brain.


Q: What is the established safety classification of Альдазол for pregnant or breastfeeding individuals?

The use of Альдазол is contraindicated during pregnancy because animal studies have shown a potential risk to the fetus. Official documents advise that the drug should generally not be used while breastfeeding, as it is not definitively known if the medication is passed through breast milk. Use during this period is only considered if the potential benefits clearly outweigh any potential risks to the infant.


Q: Are there any specific dietary limitations or foods to avoid while undergoing treatment with Альдазол?

Regulatory instructions state that the medication should be taken with food, specifically a fatty meal, to ensure proper absorption into the body for systemic infections. Additionally, some drug information suggests avoiding grapefruit and grapefruit juice, as these items may potentially alter how the medicine works in your system.


Q: How often do allergic reactions to Альдазол occur?

Hypersensitivity reactions, which include common allergic symptoms like a skin rash, itching (pruritus), or hives (urticaria), are reported in the official prescribing information. These reactions are generally categorized as uncommon, meaning they are less frequent adverse effects.


Q: Does Альдазол have known interactions with alcohol consumption?

Official regulatory drug labels typically do not specifically list an interaction between the medicine and alcohol. However, due to the potential for generalized systemic effects, individuals should clarify any questions regarding alcohol consumption with a healthcare provider.


Q: What is the safety profile of Альдазол for individuals with pre-existing kidney conditions?

Official studies on how the drug behaves in patients with pre-existing kidney impairment are limited. However, because the drug is processed and eliminated by the kidneys only minimally, a dosage adjustment for patients with kidney conditions is generally not considered necessary.


Q: How quickly does Альдазол usually begin to work after the first dose?

The drug begins to work shortly after it is taken. The active metabolite, which is the form that fights the parasite, reaches its highest concentration in the bloodstream approximately two to five hours after administration when taken with a fatty meal. The mechanism of action is then initiated through disruption of the parasite’s functions.


Q: Can elderly people use Альдазол?

Regulatory experience regarding the use of Альдазол in patients 65 years of age or older is noted as being limited. While a specific dosage change is not typically required, caution is advised for elderly patients, particularly if there is any evidence of pre-existing liver dysfunction.


Q: What color are Альдазол tablets usually?

According to the official product information, the tablets are generally described as being white or off-white. The medication is often supplied in a chewable tablet form that may be scored on one side.


Q: Does Альдазол have a reported interaction that could affect the effectiveness of hormonal birth control?

Official drug information notes a theoretical risk that Альдазол may interact with hormonal oral contraceptives. Official documentation states that women of childbearing potential are required to use an effective non-hormonal contraceptive method during treatment and for one month following the last dose.


Q: Can Альдазол cause a temporary worsening of symptoms before improvement is noted?

Regulatory warnings indicate that, in certain cases, a temporary worsening of symptoms has been reported. Patients being treated for brain cysts (neurocysticercosis) may temporarily experience neurological symptoms, such as seizures or severe headaches. This is an expected inflammatory reaction caused by the parasites dying inside the central nervous system.


Q: Does the official information for Альдазол mention anything about driving or operating machinery?

The official information states that the drug is not expected to affect a patient's ability to drive or use machines. Official information advises that if side effects such as dizziness or vertigo are experienced, caution should be exercised before driving or using machinery.

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How should Альдазол be stored and disposed of?

How to Store and Dispose of Альдазол?

The official storage and disposal requirements for Альдазол (albendazole) are set by regulatory agencies to maintain product stability and ensure public safety.

Storage Requirements

Condition Requirement
Temperature Store at controlled room temperature, generally 20 C to 25 C (68 F to 77 F).
Environment Keep the medication in its tightly closed, original container and protect it from moisture and excess heat.
Prohibited Do not freeze this medication.
Safety It must be stored out of the sight and reach of children.

Disposal Instructions

Unused or expired Альдазол must be disposed of according to local requirements. Official guidance recommends using a drug take-back program at a pharmacy or authorized location. The medication must not be thrown into wastewater or drains.

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

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