Valbazen

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Valbazen

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Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

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

Overview of Valbazen

Valbazen is a well-known, broad-spectrum antiparasitic medication used exclusively in veterinary practice for livestock. It is an oral suspension (a liquid drench) administered to non-lactating goats, sheep, and cattle.

Property Description
Active Ingredient Albendazole
Form Oral Suspension (11.36%)
Pharmacological Class Benzimidazole Anthelmintic
Common Use Broad-spectrum parasite control in livestock
US Status Over-the-counter (OTC) Animal Drug

Valbazen contains the active ingredient albendazole, which is chemically a benzimidazole compound. This class of drug is recognized for its action against parasitic worms by selectively disrupting their internal structures.

Approved for animal use, Valbazen is valued for its comprehensive coverage. A key feature is its efficacy in the removal and control of a wide range of internal parasites, including gastrointestinal roundworms, lungworms, tapeworms, and adult liver flukes.

This breadth of action distinguishes it as one of the most comprehensive dewormers in the oral suspension category for its target species. The liquid drench formulation is intended to provide a convenient, accurate method for producers to administer the necessary dose, helping to mitigate the serious health impacts that parasitic infestations can have on overall herd or flock productivity.

Regulatory References

  1. FDA DailyMed - Valbazen

What side effects are possible with Valbazen?

Possible Side Effects and Safety Information

The official safety documentation for Valbazen (albendazole oral suspension), which is approved exclusively for use in livestock (cattle, sheep, and non-lactating goats), does not list or categorize specific adverse reactions (side effects) that may occur in the treated animals. The regulatory profile emphasizes safety constraints related to the animals’ reproductive status and residue control in the food supply, rather than common systemic side effects.


Safety Constraints for Special Populations

Official regulatory warnings establish constraints for administration during specific reproductive periods due to the risk of teratogenic (fetal damage) effects. The product is strictly contraindicated during the first mathbf45 days of pregnancy in cattle and the first mathbf30 days of pregnancy in sheep and goats. Additionally, it is not approved for use in female dairy cattle of breeding age or lactating does (goats) because milk withdrawal times have not been established.


Time-Related Safety and Residue Control

Mandatory Residue Warnings require specific waiting periods before treated animals can enter the food chain. Cattle must not be slaughtered within mathbf27 days following the last treatment, and sheep and goats must not be slaughtered within mathbf7 days. These timeframes are established to ensure compliance with drug residue standards. Furthermore, regulatory labeling notes the potential for anthelmintic resistance development, which affects the long-term effectiveness of the product.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information for Valbazen (containing the active ingredient albendazole) defines the profile for high-dose exposure based on severe toxicological outcomes documented in veterinary and general albendazole monographs.


Documented Overdose Manifestations and Risks

Regulatory safety data indicates that acute toxicity, including death, has been observed in target livestock (cattle) exposed to doses significantly higher than the intended usage level. The medication carries a mandatory warning regarding teratogenicity (fetal death or birth defects) when administered to cattle during the first 45 days of pregnancy, which is a critical, population-specific toxicity risk.

In cases of systemic exposure to the active ingredient, documented serious effects can include hematological changes (e.g., bone marrow suppression) and hepatic injury (liver enzyme elevations), necessitating caution and monitoring.


Required Emergency Actions

Action Area Regulatory Status
Antidote Availability None documented in official prescribing information.
Immediate Help For suspected systemic exposure, immediate medical evaluation and institution of symptomatic and supportive treatment are required due to the potential for delayed, serious outcomes.
Monitoring Monitoring of blood cell counts and liver enzyme levels is typically required following high-dose exposure.

Management of high-dose exposure is strictly supportive, as no specific antidote is available. Immediate medical attention is required to manage potential systemic complications.

Therapeutic Uses of Valbazen

What Valbazen Treats: Main Uses and Benefits

Valbazen is commonly used for the management of broad-spectrum internal parasitic infections in livestock, targeting numerous gastrointestinal roundworms and lungworms. The treatment may assist in easing symptoms related to nutritional drain, such as stunted growth and poor feed conversion, and supports general well-being during periods of parasitic burden.


Targeted Relief for Key Parasitic Conditions

This medication is applied in addressing specific parasitic types that create noticeable physiological strain, including tapeworms and the adult stages of liver flukes (Fasciola hepatica). This is considered relevant in clinical contexts where parasites cause organ damage and functional decline. The main therapeutic benefit may assist with managing symptoms that interfere with daily functioning and supports contexts that involve efficiency, particularly when used during routine deworming programs and when dealing with increased systemic burden.

“Valbazen is used across therapeutic domains involving both high-impact organ parasites and widespread gastrointestinal worm burdens, contributing to easing the overall symptom load.”

The medication is relevant for easing the clinical signs of weight loss, reduced appetite, and general debility in conditions characterized by internal parasitic infestation.


Quick Fact: Relief for Nutritional Impairment
Valbazen assists with maintaining functional stability when symptoms related to poor nutrient absorption and performance impairment syndrome create noticeable physiological strain in livestock.

Regulatory References

  1. FDA DailyMed label for Valbazen

Eligibility and Restrictions for Use

The eligibility for Valbazen (albendazole oral suspension) is strictly governed by the species and reproductive status of the animal, as defined by regulatory documents such as the FDA's approved labeling. The medicine is primarily intended for use in non-lactating livestock.

Eligibility Category Status as Stated in Official Regulatory Documents
Populations for whom use is allowed Cattle, Sheep, and Goats. Goats specifically for nonlactating use.
Populations for whom use is contraindicated Female dairy cattle of breeding age. Lactating does (female goats).
Pregnancy and lactation eligibility Prohibited in all animals producing milk for human consumption due to lack of an established milk withdrawal time.
Early Gestation Restriction Must not be administered to female cattle during the first 45 days of pregnancy or for 45 days after bull removal. Must not be administered to ewes or does during the first 30 days of pregnancy or for 30 days after ram/buck removal.

Eligibility is defined by regulatory bodies to protect the food supply from drug residues and to prevent potential harm during critical developmental periods. The restrictions on lactating animals and those in early pregnancy are firm prohibitions that define who must not use the medicine.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents structure the interaction profile for Valbazen (Albendazole veterinary suspension) around the status of formal drug-drug interactions and specific administration restrictions.

Regulatory assessments classify formal co-administration with other medicinal products as None Known in the Summary of Product Characteristics (SmPC).

However, the interaction profile includes mandatory restrictions related to certain nutritional substances and exposure-modifying agents.


Documented Interaction Restrictions

Interaction Type Interacting Substance/Class Official Constraint
Co-administration Products containing Cobalt and Selenium Must not be administered at the same time as these products (unless advised).
Exposure Modification Ionophores May lead to an increased risk of selenium toxicity due to enhanced bioavailability.
Procedural Other products (General) The Valbazen suspension should not be mixed with other products.

These constraints define how the product should be handled relative to other substances. The restriction on simultaneous use with Cobalt and Selenium reflects a necessary precaution against potential toxicity, a risk that is explicitly documented to increase when specific drug classes, such as Ionophores, are involved in co-administration.

Mechanism of Action

Disruption of Parasite Microtubule Structure

The active metabolite, albendazole sulfoxide, initiates its mechanism by binding selectively to the parasitic worm's beta-tubulin subunit. This binding acts as an inhibitor of tubulin polymerization, directly preventing the assembly of microtubules. This process results in the disintegration of the parasite's vital cellular structure, the cytoskeleton. The subsequent breakdown of the cytoskeletal framework initiates a molecular cascade leading to profound degenerative changes within the parasite's cells, resulting in irreversible loss of motility and function.


Interference with Helminth Energy Metabolism

Following microtubule breakdown, the mechanism cascades to severely impair the function of the parasite's intestinal cells. This effect specifically blocks the cellular uptake of glucose and depletes essential glycogen stores, halting the production of ATP. This energy deficit contributes directly to the irreversible systemic functional collapse within the helminth. This selective toxicity reflects the metabolite's differential binding affinity for parasitic tubulin over host tubulin, allowing the mechanism to target parasitic structural and energy systems while host analogous structures remain largely unaffected.

Dosage and Administration Information

How to Use Valbazen

The administration of Valbazen, which contains the active ingredient albendazole, follows a weight-based protocol. The product is provided as an oral suspension (liquid drench) and is administered using a standard dosing gun or syringe. The suspension must be shaken well immediately prior to use to ensure proper mixing of the formulation. Treatment is typically delivered as a single dose application.


Official Dosing Regimens

Dosing is calculated based on the precise body weight of the animal, a critical procedural step to prevent underdosing and ensure treatment accuracy. Dosing is distinguished by the species and the targeted parasite burden:

Species and Target Dose per Kilogram (Albendazole) Notes
Cattle (for flukes and tapeworms) 10 mg/ kg Higher dose regimen.
Cattle and Goats (for roundworms) 7.5 mg/ kg Standard roundworm regimen.
Sheep (for most parasites) 5 mg/ kg General regimen.

Administration Context and Restrictions

Established instructions limit the use of Valbazen to non-lactating cattle, sheep, and goats. The product is not for use in female dairy cattle of breeding age. Furthermore, its use around the reproductive cycle is restricted: it must not be administered to female cattle during the first 45 days of pregnancy or for 45 days following the removal of bulls. For ewes and does, this restriction applies during the first 30 days of pregnancy. This procedural structure defines the standardized and constrained approach to using the medication.

Recent Clinical Evidence

Research evidence / Overview of Studies for Valbazen

Evidence for use in Gastrointestinal and Lung Worm Infections

The research base for Valbazen primarily consists of controlled trials applied in research contexts involving outcomes related to physiological strain associated with parasitic infection. These studies often compared treated animals to untreated controls to assess measured outcomes related to parasite burden. Specifically, research examined how post-treatment worm counts changed in key target species like cattle and sheep. Further field studies monitored outcomes related to faecal egg shedding over defined time intervals.

Studies described specific patterns observed in the measured post-treatment worm counts, as required for regulatory review. However, evidence derived from observational settings evaluating daily-life functioning has shown that faecal egg counts post-treatment may vary, suggesting that measured outcomes in highly controlled settings were not always identically reproduced in all field environments.

Evidence for use in Adult Liver Fluke and Tapeworm Infections

Research has explored the drug's activity in conditions involving periods of heightened symptoms associated with Adult Liver Fluke (Fasciola hepatica) and Tapeworm infections. The regulatory evidence predominantly comes from controlled trials that were studied for activity against the adult parasitic stages. The study outcomes examined included direct quantification of the adult fluke and tapeworm counts in the observed populations.

Findings across studies described patterns where measured outcomes related to activity against the immature (developing) stages of liver flukes were described as limited. Scientific literature described reported instances where specific liver fluke isolates were associated with changes in measured drug response in certain regions.

Research Gaps and Areas of Uncertainty

The research provides context but not individual predictions, highlighting what is known and what is still uncertain about Valbazen. Follow-up durations were limited in many of the initial controlled trials, meaning long-term effects related to maintaining a low parasite burden are not fully established.

A significant gap in the evidence landscape relates to the emergence of anthelmintic resistance (AR). Subsequent scientific literature describes reported AR findings, leading to uncertainty regarding the predictability of results in some current field settings. Finally, comparative evidence for the evaluation of immature liver flukes is lacking, as results apply only to the adult parasitic stages studied in the regulatory trials.

Key Studies & References Valbazen (albendazole) Oral Suspension, 11.36% - FDA DailyMed Label (NADA #110-048)

Frequently Asked Questions (FAQ)

Common questions about Valbazen (FAQ)

Q: What are the most common visible side effects of giving Valbazen?

Official product information for Valbazen does not list or categorize common, specific adverse reactions (side effects) that may occur in the treated animals. The regulatory documents focus primarily on strict constraints related to reproductive safety and residue warnings for the food supply.

Q: What are the signs of an allergic reaction to Valbazen?

Official documents do not typically list the common signs of an allergic reaction. However, due to the nature of the ingredients, sensitization (an allergic skin reaction) may potentially occur. The primary safety focus is on the risk of developmental harm during early pregnancy and avoiding drug residues in the food supply.

Q: Are there different forms of Valbazen (e.g., liquid, paste, tablets)?

According to the official product information, Valbazen is supplied as an Oral Suspension, which is a liquid drench. The label does not indicate that other dosage forms, such as paste or tablets, are currently approved or available for this product.

Q: Is Valbazen effective against giardia or coccidia?

The official veterinary label specifies that Valbazen is indicated for the removal and control of liver flukes, tapeworms, stomach worms, intestinal worms, and lungworms. Efficacy against Giardia or Coccidia is not listed as part of the approved indications for this product.

Q: Can Valbazen be used in young animals, like puppies or kittens?

Valbazen is approved exclusively for use in livestock: Cattle, Sheep, and Goats. It is not approved for use in companion animals such as dogs or cats, including puppies or kittens. Using the product in unapproved species is not consistent with the regulatory label.

Q: Are there any species of animals that should absolutely never receive Valbazen?

The regulatory label specifies the approved use is only for non-lactating Cattle, Sheep, and Goats. Therefore, use in any unapproved species is not permitted. Furthermore, there are strict contraindications prohibiting use in female dairy cattle of breeding age and in animals during early pregnancy.

Q: What are the serious, but less common, side effects associated with Valbazen?

Official safety documents emphasize the risk of teratogenic effects (fetal damage) if given during early pregnancy, which is the most critical warning for the product. Additional safety data may be associated with effects on the blood, liver, and testes.

Q: Are there specific parasites Valbazen is known not to treat?

The evidence presented in the regulatory materials focuses on the adult stages of parasites. It indicates that Valbazen has limited activity against the immature (developing) stages of liver flukes when compared to the adult stages of the parasite.

Q: Does using Valbazen affect the results of a routine blood test?

While the veterinary label does not detail interference with blood tests, studies on the active ingredient (albendazole) have shown it may affect certain parameters. This includes potential changes to hematological (blood cell) counts and liver enzyme levels, which are monitored in routine blood work.

Q: What are people usually referring to when they mention 'Valbazen toxicity'?

Toxicity concerns often documented in official information relate to two main areas: teratogenic effects (the risk of birth defects) if administered during early pregnancy, and the potential for enhanced selenium toxicity when Valbazen is used alongside certain other drugs (ionophores).

Q: How soon after deworming with Valbazen can I repeat the treatment?

The official dosage instructions for Valbazen are a single dose. While the label indicates that animals with constant parasite exposure may require retreatment, it does not provide a fixed interval for repeating the treatment.

Q: Does Valbazen interfere with vaccines or other regular treatments?

Formal regulatory assessment classifies drug-drug interactions with other medicinal products as None Known. However, official restrictions prohibit the simultaneous administration of Valbazen with products containing Cobalt and Selenium due to toxicity risks.

Q: Are there any age limits for using Valbazen in livestock?

The eligibility for using Valbazen is defined by the animal's reproductive status (e.g., non-pregnant and non-lactating) and not by its age. The medicine is primarily designed for use in adult livestock that fall outside of these critical reproductive periods.

Q: What happens if Valbazen is given at a lower than intended amount?

The official label includes a clear warning: 'Do not underdose.' Giving less than the prescribed, weight-based amount may lead to ineffective treatment against the parasites. Furthermore, underdosing is a known factor that contributes to the development of anthelmintic (worm) resistance.

Q: Can Valbazen be mixed with food or water for easier administration?

The regulatory guidelines specify that the Valbazen suspension should not be mixed with other products as a general constraint. Administration is intended to be via a standard dosing gun or syringe to ensure the correct volume is delivered.

Q: What are the typical packaging sizes that Valbazen comes in?

Valbazen is intended for large-volume animal use and is commonly supplied in large commercial containers. These typically include sizes such as 1-liter and 5-liter HDPE bottles, as indicated in the product's distribution information.

Q: Are there long-term effects associated with repeated Valbazen treatment?

The initial controlled trials used for regulatory approval had limited follow-up durations, meaning that long-term effects related to maintaining a low parasite burden were not fully established during those studies. Scientific research continues to monitor the emergence of parasite resistance over time.

How should Valbazen be stored and disposed of?

How to Store and Dispose of Valbazen (Albendazole Suspension)

The storage and disposal of Valbazen must adhere strictly to official regulatory guidelines to maintain product integrity and environmental safety.


Storage Requirements

Valbazen must be stored at Controlled Room Temperature, defined as 20^circC to 25^circC (68^circF to 77^circF). It is mandatory to Protect From Freezing.

The medication must be kept in the original tightly closed container and stored Out of Reach of Children.

  • Stability: The official regulatory guidance specifies that the product must be used within 6 months after the initial opening.

Disposal Instructions

Unused or expired Valbazen and related waste materials must be disposed of in accordance with local requirements.

Official labeling includes explicit environmental warnings: Do not contaminate ponds, waterways or ditches with the product or empty containers, as the medication is a hazard to aquatic life.

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

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