Cobactan LC

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Cobactan LC

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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 Cobactan LC

Quick Facts

Property Description
Active ingredient Cefquinome sulphate
Form Intramammary suspension / ointment (oily base)
Pharmacological class Fourth-Generation Cephalosporin (beta-Lactam Antibiotic)
Typical Use Treatment of bacterial mastitis in lactating dairy cows
Origin Semisynthetic

What Type of Medicine is Cobactan LC and its Primary Purpose?

Cobactan LC is a specialized, prescription-only veterinary medicine presented as an intramammary ointment, distinguishing it as a localized treatment delivered via an oily base, exclusively for use in lactating dairy cows. The primary purpose of this preparation is the targeted elimination of bacterial pathogens sensitive to its active component within the udder. This localized administration approach is clinically recognized for ensuring the compound is delivered directly to the infection site, which is essential for controlling the microbial population without requiring systemic absorption.

Cefquinome: Classification and Composition

The active ingredient in Cobactan LC is Cefquinome sulphate, which is classified as a semisynthetic beta-Lactam antibiotic. Specifically, Cefquinome is designated a fourth-generation cephalosporin, representing a significant chemical evolution within this family. Cobactan LC is a single-active ingredient formulation, where the Cefquinome is suspended within a specific oily vehicle base intended to facilitate effective, sustained distribution within the udder tissue. The importance of this specific category of cephalosporins relates to its role in addressing a broad range of challenging bacterial pathogens.

Core Action: Why the Fourth Generation is Significant

The primary function of Cefquinome involves the inhibition of bacterial cell wall synthesis. The advantage conferred by its fourth-generation classification is its broad antibacterial spectrum and, critically, its high stability against beta-lactamases, which are defense enzymes produced by resistant bacteria. This stability allows Cefquinome to maintain effectiveness against a wider range of bacteria, enhancing the probability of achieving a successful bacteriological cure in typical use scenarios, such as when treating clinical mastitis in cattle.

Regulatory References

  1. HPRA Product Details for Cobactan LC

What side effects are possible with Cobactan LC?

Possible Side Effects and Safety Information

The safety profile for Cobactan LC (Cefquinome sulphate), a fourth-generation cephalosporin, is structured by regulatory agencies around specific categories of risk and documented adverse events in the target species. The information presented here is strictly based on official regulatory documents, such as the Summary of Product Characteristics (SmPC).


Officially Documented Adverse Reactions

Adverse reactions associated with this intramammary suspension are classified according to frequency. The single, explicitly documented adverse reaction falls under the category of Immune System Disorders.

Adverse Reaction Frequency Classification
Anaphylaxis (Severe systemic hypersensitivity) Very Rare (less than 1 animal per 10,000 treated animals)

Anaphylaxis represents the serious adverse reaction documented in regulatory materials, consistent with the nature of beta-lactam antibiotics which can induce severe, sudden-onset hypersensitivity.


Regulatory Constraints and Safety Considerations

A critical safety restriction is the contraindication for use in any animal with a known hypersensitivity to cephalosporin antibiotics or other beta-lactam antibiotics. This is due to the potential for cross-sensitivity within this pharmacological class.

The product is officially intended for use during lactation. Safety evaluations have indicated no evidence of reproductive toxicity or teratogenic potential in studies.

A key administration-agnostic safety note is the risk of increasing antimicrobial resistance. Inappropriate use may heighten the prevalence of bacteria resistant to cefquinome, potentially decreasing the effectiveness of cephalosporin treatments due to cross-resistance.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory guidance for Cobactan LC (Cefquinome sulphate intramammary ointment) structures the overdose profile around the localized nature of the formulation and the mandatory emergency actions required for the administering person.

Target Species Overdose Profile (Lactating Cows)

Element Official Regulatory Statement
Documented Overdose Manifestations No clinical symptoms are expected in the target species following the overdosage of the intramammary suspension, which is attributed to minimal systemic absorption.
Emergency-Response Statement No emergency procedures are required for the animal.
Antidote Information No specific antidote is described in the regulatory documents for managing this type of overdosage.

Immediate Actions Required for Human Exposure

The most critical element of the required help-seeking guidance addresses the potential risk of hypersensitivity to the cephalosporin-class antibiotic in the person administering the product.

Action Required Medical Help (Label-Derived Phrasing)
Serious Symptoms Urgent medical attention is required immediately if exposure leads to serious allergic symptoms, including swelling of the face, lips or eyes, or difficulty with breathing.
Less Serious Symptoms Seeking medical advice is required for individuals who develop less severe symptoms following exposure, such as a skin rash.

The official regulatory structure establishes that the risk of overdosage is negligible in the target species. Consequently, all official emergency response statements are directed toward the specific, label-mandated actions necessary for the human user in the event of accidental exposure.

Therapeutic Uses of Cobactan LC

What Cobactan LC Treats: Main Uses and Benefits

This medication is applied across therapeutic domains where additional symptomatic support is needed to address symptoms related to inflammatory or irritative states. It is relevant for managing symptom clusters that may become intense or disruptive, such as localized swelling, heat, redness, and discomfort. This medicine is used in situations involving certain distressing symptoms. This class of drugs is considered relevant for managing localized issues that involve inflammatory processes. It is often used during phases when symptoms become more noticeable.

It is commonly used across conditions presenting with acute episodes. The therapeutic focus is on helping to resolve the functional impact of the condition, a benefit that assists with maintaining functional stability. This medication supports patients during episodes of heightened discomfort and helps improve day-to-day comfort during symptomatic periods.

Quick Fact: Relief for Localized Discomfort

It is useful in scenarios where symptoms escalate temporarily, which include periods of noticeable discomfort and functional strain.

“It provides support that helps ease the overall symptom burden during periods of acute discomfort.”

Eligibility and Restrictions for Use

Who can and cannot use Cobactan LC? — Official Regulatory Information

The eligibility profile for Cobactan LC is strictly defined by regulatory documents, focusing on the target species and absolute contraindications related to allergic history.


Eligibility Scope

Category Official Regulatory Statement
Populations for whom use is allowed Lactating cows (dairy cattle)
Populations for whom use is contraindicated Animals with known hypersensitivity to cephalosporin antibiotics or other beta-lactam antibiotics (e.g., penicillins)
Age-related eligibility rules Adult animals only (Lactating cows). Use in non-target age groups is not specified.
Pregnancy and lactation eligibility status The product is intended for use during lactation.
Eligibility-related restrictions Do not use the accompanying cleaning towel if lesions are present on the teat.

Eligibility Classifications (High-Level)

Category Classification Details
Eligibility severity classification Absolute Contraindication (for hypersensitivity)
Regulatory basis EMA/HPRA/VMD (European and UK governmental bodies)
Eligibility-context constraints Species-specific limitation (cattle) and Physiological state-specific (lactating).

Resulting Eligibility Structure

Official eligibility statements:

  • Use of Cobactan LC is restricted to the target species, lactating dairy cows, for the treatment of clinical mastitis.
  • The medicine must not be administered to any animal with a known allergy to beta-lactam antibiotics, which includes cephalosporins and penicillins.
  • The product is officially documented as intended for use during lactation.

Connection to the overall eligibility profile Official regulatory documents define who can and cannot use the medicine by establishing the required target species (lactating cows) and imposing an absolute contraindication based on known beta-lactam hypersensitivity. This prevents use in animals with a history of allergy to the antibiotic class, reflecting a crucial eligibility barrier.

What should I know about interactions with other medicines?

The officially documented interaction profile for Cobactan LC (Cefquinome sulphate) is structured around strict administrative constraints and class-specific pharmacologic relationships. The regulatory label defines several mandatory requirements and prohibitions.


Contraindicated Combinations and Drug Classes

The use of this product is formally contraindicated in animals with documented hypersensitivity to either cephalosporin antibiotics or other beta-lactam antibiotics. This is a mandatory, class-level restriction rooted in the established risk profile of this antibiotic family.


Pharmaceutical Incompatibility and Mixing

A major interaction-related restriction concerns pharmaceutical incompatibility. Regulatory documentation explicitly mandates that Cobactan LC must not be physically mixed with any other veterinary medicinal products. This requirement is imposed due to the absence of official studies confirming compatibility.


Microbial Pharmacodynamic Considerations

Regarding pharmacodynamic effects at the microbial level, regulatory sources note a known cross sensitivity to cephalosporins exists for bacteria susceptible to that drug group. This describes a shared responsiveness pattern related to the antibiotic class.


Protocols for Concurrent Use

Finally, the official label includes a specific protocol for concurrent administration. When this intramammary product is utilized alongside the systemic product Cobactan (Cefquinome) 25 mg/ml Suspension for Injection, this combined therapy is subject to a formal constraint that modifies the regulatory withdrawal period.

Mechanism of Action

Cefquinome, the active ingredient, exerts its action through a strictly bactericidal mechanism, targeting the essential structural pathways of susceptible bacteria. The molecule functions as a mechanism-based inhibitor by binding irreversibly to bacterial Penicillin-Binding Proteins (PBPs), a family of enzymes located in the cell membrane. This covalent interaction halts the transpeptidation step, which is critical for the final cross-linking of the peptidoglycan polymer and the assembly of the cell wall.

The immediate intracellular consequence of a defective cell wall is the inability to withstand internal osmotic pressure, leading to osmotic lysis and microbial cell death. A contributing mechanistic property is Cefquinome’s zwitterionic structure, which facilitates enhanced penetration across the outer membrane of Gram-negative bacteria, thereby ensuring target access. The elimination of the microbial population subsequently removes the primary pathological stimulus, allowing the local inflammatory state to subside.

Dosage and Administration Information

The usage of Cobactan LC follows a protocol that defines both the route and the precise dosing regimen for lactating dairy cows. The medicine is for intramammary infusion and is not indicated for other routes of administration. The standard dose delivered to each affected quarter is the entire contents of one single-dose syringe, which contains 75 mg Cefquinome as the active component.

Administration Protocol and Timing

Field Description
Dosing Schedule One single-dose syringe per affected quarter.
Frequency Every 12 hours.
Course Duration Three successive infusions.
Use Context Labeled exclusively for lactating dairy cows.

The frequency of administration is set at every 12 hours and is timed to occur after each successive milking. The total treatment duration consists of a regimen of three infusions.

Procedural Conditions

There are specific procedural steps for the use of this medication. Before infusion, the affected quarter is to be completely milked out. Immediately following this, the teat and orifice are thoroughly cleaned and disinfected. Once the syringe contents are infused, the product is dispersed by gentle massage of the udder and teat. The single-dose syringes are not to be reused.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Cobactan LC


Evidence for Use in Clinical Mastitis in Lactating Dairy Cows

The primary type of research available includes randomized controlled field trials (RCTs). In these trials, the product was compared to either a standard antibiotic or an inactive treatment to understand the measurements and patterns observed under controlled farm conditions. These studies research examined outcomes related to physical signs and systemic or functional imbalance in the animals, such as those related to inflammatory or irritative states. Specifically, researchers monitored the clinical resolution rate, which looks at the changes in physical signs of mastitis. They also explored the bacteriological cure rate, which describes the patterns observed in the studies related to the elimination of the specific types of bacteria targeted by the drug. The findings describe patterns observed in the studies related to both clinical response and bacterial elimination.

Comparative Studies and Context

Research also explored how the product compared to other established treatments. These comparative studies examined outcomes related to clinical resolution and bacteriological cure when used against standard therapy. The research explored short-term changes in the outcomes measured when compared to a comparator drug or placebo. Studies focused on episodes where symptoms become more noticeable, measuring the rates at which different treatments were associated with a measured clinical response. Findings describe patterns observed in the studies relative to its comparators. However, the available comparative evidence is limited in some areas, meaning direct comparisons with every available alternative are not fully established.

What is Still Uncertain About Cobactan LC Evidence

While research contributes to the broader evidence landscape, there are still areas where more information is needed. Comparative evidence is lacking for some of the alternative treatments available. Additionally, sample sizes were modest in some instances, and evidence quality varies across studies, leading to some uncertainty in synthesizing the overall picture. Furthermore, long-term effects are not fully established, and information on the sustained impact of treatment over many months is limited. Research is ongoing to help clarify some of these areas, but currently, the available evidence highlights what is known — and what is still uncertain — about the product's observed outcome patterns under various conditions.

Frequently Asked Questions (FAQ)

Common questions about Cobactan LC (FAQ)

Q: Is Cobactan LC an antibiotic, an antiviral, or something else?

A: According to the official product information, Cobactan LC is classified as an antibacterial drug. This means it belongs to the cephalosporin group, which is a type of beta-lactam antibiotic that addresses certain kinds of bacteria.

Q: How does Cobactan LC differ from other similar medicines?

A: Regulatory documents describe the active ingredient, Cefquinome, as a fourth-generation cephalosporin. This specific classification is noted for its high stability against certain bacterial enzymes (beta-lactamases) and properties that allow for cellular penetration.

Q: Can Cobactan LC affect sleep patterns?

A: The drug is officially indicated for use in lactating dairy cows. The only adverse reaction officially documented in the product's safety profile is anaphylaxis, which is classified as very rare. Effects on sleep patterns are not listed in the regulatory documents for the target species.

Q: Is a mild headache a common reaction to Cobactan LC?

A: According to official safety information, the only adverse reaction documented for the target species is anaphylaxis, classified as very rare. Minor systemic reactions such as headaches are not listed in the regulatory documents.

Q: Does Cobactan LC interact with common over-the-counter pain relievers?

A: Cobactan LC is strictly approved for use in lactating dairy cows via intramammary infusion. For this reason, the official regulatory label does not discuss interactions with human medications like over-the-counter pain relievers.

Q: Can taking Cobactan LC with certain vitamins or supplements be a problem?

A: The official prescribing information requires that Cobactan LC must not be physically mixed with any other veterinary medicinal products. Beyond this, no specific interactions with vitamins or supplements are listed in the regulatory documentation.

Q: Are there any known issues with Cobactan LC and alcohol consumption?

A: The official product is exclusively intended for use in lactating dairy cows and is given by intramammary infusion. Therefore, the regulatory documents do not contain information or warnings regarding alcohol consumption, which is a human constraint.

Q: What foods or drinks should be avoided while using Cobactan LC?

A: Cobactan LC is officially intended for use in lactating dairy cows and is administered via intramammary infusion. The regulatory label does not list any specific constraints or prohibitions related to foods or drinks for the target species.

Q: Can Cobactan LC be used by children?

A: Cobactan LC is officially and exclusively intended for use in lactating dairy cows for veterinary purposes. Its use in humans, including children, is not authorized or described in the regulatory documents.

Q: Is Cobactan LC safe to use during pregnancy?

A: The product is officially intended for use during lactation. Safety evaluations performed in the course of regulatory approval noted no evidence of reproductive toxicity or teratogenic potential in studies involving cattle or laboratory animals.

Q: Is Cobactan LC appropriate for breastfeeding mothers?

A: Cobactan LC is officially and exclusively intended for use in lactating dairy cows. Its use in human mothers, including those who are breastfeeding, is not authorized or described in the regulatory documents.

Q: Can older adults use Cobactan LC safely?

A: Cobactan LC is officially and exclusively intended for use in lactating dairy cows for the treatment of mastitis. Its use in humans, including older adults, is not authorized or described in the regulatory documents.

Q: Is Cobactan LC a treatment or a cure for the conditions it addresses?

A: Regulatory documents describe the product as indicated for the treatment of clinical mastitis. The mechanism of action is bactericidal, meaning it works by causing microbial cell death to remove the pathological stimulus.

Q: Why is Cobactan LC prescribed by doctors?

A: The product is officially indicated for the treatment of clinical mastitis in lactating cows. This use is specifically targeted toward infections caused by certain cefquinome-sensitive bacteria, such as Staphylococcus aureus and Escherichia coli.

Q: Is Cobactan LC a common type of drug?

A: Cefquinome is described in regulatory contexts as a fourth-generation cephalosporin. This is a specific class of beta-lactam antibiotic that is approved and used only in veterinary medicine for its authorized purposes.

Q: What makes Cobactan LC special compared to older treatments?

A: Regulatory texts describe the active ingredient, Cefquinome, as a fourth-generation cephalosporin. This particular classification is noted for combining high cellular penetration and high stability against certain types of bacterial enzymes (beta-lactamases).

Q: How quickly does Cobactan LC usually start working?

A: Regulatory materials indicate the product has a rapid onset of activity after administration. This rapid action is described as facilitating distribution and penetration deep into the udder tissue.

Q: How long does it typically take for Cobactan LC to show an effect?

A: Official regulatory materials state the product is associated with patterns of decreased inflammation and cell counts in the target species. The administration schedule is set at every 12 hours for three successive infusions, with clinical effects monitored over this short course.

Q: What happens if I stop using Cobactan LC too early?

A: The administration protocol is rigidly set for three successive infusions. Official documentation states that inappropriate use, which includes not completing the full fixed regimen, may increase the prevalence of antimicrobial resistance.

Q: Is it normal to feel no immediate change after starting Cobactan LC?

A: The drug's mechanism is strictly bactericidal (killing bacteria), which leads to a rapid reduction in the pathological stimulus. The onset of visible clinical resolution is monitored by researchers over the short-term course of therapy, indicating that changes may not be immediate.

Q: Does Cobactan LC cause nausea or stomach issues often?

A: The product is strictly intended for use in lactating dairy cows. The only adverse reaction officially documented for the target species is Anaphylaxis (Very Rare). Nausea or stomach issues are not listed in the regulatory documents.

Q: Does Cobactan LC interact with blood pressure or heart medications?

A: Cobactan LC is strictly intended for use in lactating dairy cows and is administered via intramammary infusion. Because it is an animal-use product, the regulatory label does not discuss interactions with human blood pressure or heart medications.

Q: Is Cobactan LC appropriate for people with kidney problems?

A: Cobactan LC is officially and exclusively intended for use in lactating dairy cows. Its use in humans with kidney problems, or any other human use, is not authorized or described in the regulatory documents.

Q: Can people with a history of liver issues use Cobactan LC?

A: Cobactan LC is officially and exclusively intended for use in lactating dairy cows. Its use in humans with liver issues, or any other human use, is not authorized or described in the regulatory documents.

Q: Is the research for Cobactan LC considered high quality?

A: Regulatory texts summarize the evidence landscape by noting that evidence quality varies across studies. It is stated that sample sizes were modest in some instances, and comparative evidence is still lacking for some alternative treatments.

Q: Why do official documents describe the drug in a certain way?

A: Official regulatory documents use standardized, precise, and highly constrained language. This is required to meet the legal framework for reporting the drug's approved indications, established safety profile, and strict usage constraints.

Q: What is meant by the 'safety classification' of Cobactan LC?

A: Safety is determined by classifying the frequency of documented adverse events in the target species. For this product, the serious adverse reaction, Anaphylaxis, is classified as Very Rare, meaning it is expected in less than 1 animal per 10,000 treated animals.

Q: Is Cobactan LC a fast-acting medicine?

A: Regulatory materials state that the product has a rapid onset of activity and is noted for achieving rapid penetration deep into the udder tissue.

Q: Is it possible to develop a tolerance to Cobactan LC over time?

A: Regulatory documents state that inappropriate use may increase the prevalence of bacteria that are resistant to cefquinome. This resistance can potentially decrease the effectiveness of cephalosporin treatments due to cross-resistance within the drug class.

Q: Is Cobactan LC known to cause dizziness or confusion?

A: The product is strictly for lactating dairy cows. The only adverse reaction officially documented for the target species is Anaphylaxis (Very Rare). Dizziness or confusion are not listed in the regulatory documents.

Q: Does Cobactan LC affect the immune system directly?

A: The drug's primary mechanism of action is strictly bactericidal, meaning it works by killing bacteria. The only documented adverse effect related to the immune system is the potential for a severe hypersensitivity reaction (Anaphylaxis), which is classified as very rare.

Q: Can Cobactan LC be used for minor, non-listed conditions?

A: Regulatory approval specifies the product's indication for clinical mastitis caused only by a list of sensitive organisms. Its use for any minor or non-listed conditions is not authorized or described in official documents.

Q: What are the high-level themes of research on Cobactan LC effectiveness?

A: Official research examined two high-level outcome themes related to effectiveness: the clinical resolution rate (changes in physical signs) and the bacteriological cure rate (elimination of specific bacteria targeted by the drug).

Q: Can Cobactan LC be taken on an empty stomach?

A: Cobactan LC is administered by intramammary infusion, directly into the udder. Since it is not swallowed or absorbed systemically via the gut, its use is not dependent on or affected by the presence of stomach contents.

Q: Is it normal for a doctor to prescribe Cobactan LC for a short time?

A: The standard administration protocol requires a regimen of three successive infusions spaced 12 hours apart. The total treatment duration is therefore defined as a short course lasting 36 hours.

Q: Is there a common reason for someone to be allergic to Cobactan LC?

A: The product is contraindicated in animals with a known hypersensitivity to cephalosporin antibiotics or other beta-lactam antibiotics. This restriction is rooted in the established potential for cross-sensitivity within this pharmacological class.

How should Cobactan LC be stored and disposed of?

Storage & Disposal Scope

Item Labeled Regulatory Requirement
Labeled storage temperature requirements Store at or below 25 C (or 30 C in some regions). Alternate instructions require storage between 2 C and 8 C.
Stability after opening/reconstitution (if applicable) The product is for single use only; it must be used immediately after opening and preparation.
Handling requirements The product must not be frozen. Any partially used syringes must be discarded.
Disposal instructions (as documented in government sources) Unused product or waste material must be disposed of in accordance with national requirements.
Environmental or controlled-waste disposal requirements Medicines should not be disposed of via wastewater or household waste to help protect the environment.
Child-protection storage requirements (if stated) Must be kept out of the sight and reach of children.

Resulting Storage & Disposal Structure

Official regulatory documents define strict storage controls for Cobactan LC, mandating storage within defined temperature ranges and prohibiting freezing to maintain stability. Due to the single-use nature of the intramammary syringe, the entire contents must be administered immediately after opening, and partially used syringes must be discarded. Furthermore, the medicine is explicitly restricted from disposal via wastewater or household waste, requiring that all unused product and waste be handled according to official national pharmaceutical waste protocols.

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

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