Combiotic

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Combiotic

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Medically reviewed

Laura Arias

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 Combiotic

Property Description
Active Ingredients Benzylpenicillin, Dihydrostreptomycin, Procaine
Form Injectable Suspension (Aqueous Vehicle)
Pharmacological Class Antibiotic (Beta-Lactam and Aminoglycoside combination)
Common Type Fixed-Dose Combination (FDC) Antimicrobial
Primary Use Context Veterinary Medicine

Identity and Classification

Combiotic is a Fixed-Dose Combination (FDC) Antimicrobial Preparation, specifically an injectable suspension containing two distinct antibiotics and a local anesthetic, primarily utilized in veterinary medicine. The drug is categorized as an Antibiotic agent and is unique because it incorporates components from two major pharmacological classes: the Beta-Lactam class and the Aminoglycoside class. This dual-class structure is clinically recognized for providing a broader spectrum of antimicrobial activity than therapies reliant on a single class. Both primary antibiotic components are categorized as essential antimicrobial agents.


Composition and General Purpose

The active core of the medicine consists of the antibiotics Benzylpenicillin and Dihydrostreptomycin, and the local anesthetic Procaine. This formulation is prepared in an aqueous vehicle for deep intramuscular injection. The combination's general purpose is to combat serious bacterial infections caused by diverse microbial populations, particularly mixed infections in the veterinary context. The inclusion of Procaine forms a poorly soluble salt, Procaine Benzylpenicillin, which acts as a depot to prolong the antibiotic's action. This differentiating feature ensures the medication remains active in the system for an extended duration. Furthermore, the Procaine component acts as a local anesthetic, mitigating the pain and discomfort associated with the required intramuscular injection.

Regulatory References

  1. World Health Organization

What side effects are possible with Combiotic?

Possible Side Effects and Safety Information

The official safety profile of this Fixed-Dose Combination (FDC) antimicrobial is structured around the documented risks of its components: Penicillin, Dihydrostreptomycin, and Procaine.

Adverse reactions are classified into several System-Organ Classes (SOCs), most notably Immune System Disorders, Nervous System Disorders, and Renal and Urinary Disorders. The risk of allergic reactions, including anaphylactic shock, is documented, which is rare but potentially fatal. Other reactions such as injection site pain are also reported.


Key Safety Patterns and Serious Reactions

Safety Category Officially Documented Reactions
Serious Adverse Reactions Anaphylactic Shock, Neuromuscular Blockade, Permanent Ototoxicity (Hearing Loss)
Duration-Related Risk Nephrotoxic and Vestibulotoxic signs associated with prolonged administration of high doses
Procaine-Related Effects Acute, transient events such as shivering, vomiting, and nervous stimulation

Regulatory Safety Constraints

The product is contraindicated in individuals with known hypersensitivity to penicillins or dihydrostreptomycin. Furthermore, regulatory labels specify that the product must not be administered to patients with pre-existing renal impairment due to the increased risk of Dihydrostreptomycin-related nephrotoxicity and ototoxicity. The risk of neuromuscular block may also be potentiated when this product is used concomitantly with certain anesthetic or muscle-relaxing agents. Administration is strictly restricted to the intramuscular route as other routes carry a serious risk of complications.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documents describe the potential overdose profile for the Combiotic fixed-dose combination based on the distinct toxicities of its three components.

Documented Manifestations and Severe Outcomes

Overexposure may lead to symptoms associated with neuromuscular hyperirritability, acute nervous stimulation, and signs of nephrotoxic injury. Manifestations linked to the Dihydrostreptomycin component include vestibuletoxic signs, such as ataxia and incoordination, with deafness listed as a potential long-term complication of high-dose exposure. Systemic allergic reactions, including urticaria and edema, are also documented risks of overexposure. Population-specific notes detail nervous system effects in horses and acute toxicity in pigs (including abortion).

Life-threatening outcomes include convulsive seizures, acute neuromuscular block, severe anaphylactic shock, and embolic shock (associated with inadvertent intravenous administration).

Regulatory-Mandated Emergency Actions

When overexposure is suspected or these severe symptoms manifest, the official guidance is to seek medical advice immediately or call a physician or poison control centre immediately. Management involves symptomatic and supportive treatment, with specific interventions documented for complications: calcium infusion and neostigmine for neuromuscular block, and glucocorticoids and antihistaminics for allergic reactions.

Therapeutic Uses of Combiotic

What Combiotic Treats: Main Uses and Benefits

Combiotic is commonly used in situations involving certain distressing symptoms and is applied across domains where additional symptomatic support is needed. This therapeutic approach is considered relevant for contexts marked by increased discomfort or tension. The primary goal is to provide support that helps ease the overall symptom burden.

The medication is generally applied in clinical settings that involve acute or unstable symptom patterns, such as during phases of heightened discomfort, managing disruptive symptom patterns, and supporting acute or recurrent episodes.

Key Therapeutic Focus

Combiotic assists in addressing symptom clusters that may become intense or disruptive, helping to support patients during episodes of heightened discomfort. It is relevant for easing symptoms associated with systemic imbalance, heightened physiological activity, and functional stress linked to specific conditions. Combiotic is commonly used when short-term symptomatic assistance is needed.

  • Quick Fact: Relief for Noticeable Physiological Strain

Regulatory References

  1. NIH National Center for Complementary and Integrative Health

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Combiotic — official regulatory information


Eligibility Scope

  • Populations for whom use is allowed (as stated in label): Use is officially documented and allowed in cattle, horses, swine, and sheep under standard conditions.
  • Populations for whom use is not recommended (if applicable): Use is not recommended in severely dehydrated animals or in animals with reduced renal function.
  • Populations for whom use is contraindicated: Use is absolutely contraindicated in small herbivores, including rabbits, guinea pigs, hamsters, and gerbils. It is also contraindicated in animals with known hypersensitivity to penicillins, procaine, or aminoglycosides.
  • Age-related eligibility rules: Use is restricted or requires caution in neonates and animals less than one month old.
  • Condition-specific eligibility rules: The product is contraindicated in animals with seriously impaired renal, cardiac, or hepatic function.
  • Pregnancy and lactation eligibility status (if explicitly documented): Use is prohibited in lactating ewes producing milk for human consumption.
  • Eligibility-related restrictions: Human handlers with known sensitivity to penicillins or cephalosporins are officially advised against handling the product.

Eligibility Classifications (High-Level)

  • Eligibility severity classification (as defined in official documents): Contraindicated (e.g., small herbivores, severe organ failure); Prohibited (e.g., lactating ewes); Restricted/Caution (e.g., young animals).
  • Regulatory basis (EMA / FDA / etc.): Veterinary labeling documents, including the Summary of Product Characteristics and the US Code of Federal Regulations.
  • Eligibility-context constraints (as defined in official documents): Eligibility is constrained by target species identification, elimination organ function, and hypersensitivity history.

Resulting Eligibility Structure

Official eligibility statements:

  • The medicine is contraindicated for use in rabbits, guinea pigs, hamsters, and gerbils.
  • The product must not be used in animals with a known hypersensitivity to penicillins, procaine, or aminoglycosides.
  • Use is contraindicated in animals with seriously impaired renal function.

Connection to the overall eligibility profile: Regulatory documents establish that eligibility for Combiotic is defined by the target animal species and is restricted by pre-existing comorbidities, particularly those affecting the kidneys. The regulatory profile places absolute prohibitions on use in small herbivores and in all populations (animal and human) with documented hypersensitivity.

What should I know about interactions with other medicines?

The interaction profile for Combiotic (Benzylpenicillin, Dihydrostreptomycin, Procaine) is officially defined by the combined pharmacological characteristics of its Beta-Lactam and Aminoglycoside components, with regulations detailing specific restrictions and interaction patterns.

Formal Contraindications and Prohibitions

Co-administration is formally prohibited with certain other medicinal products. The combination is contraindicated with Tetracyclines due to the official risk of antagonism, which may reduce the bactericidal efficacy of the penicillin component. Furthermore, co-administration with other Aminoglycosides (such as Gentamicin or Neomycin) is prohibited due to the officially documented risk of additive toxicity, specifically heightened nephrotoxicity and ototoxicity, stemming from the Dihydrostreptomycin component.

Pharmacokinetic and Pharmacodynamic Interactions

The Benzylpenicillin component is subject to a pharmacokinetic interaction involving renal clearance. Co-administration with Probenecid increases and prolongs the plasma concentration of Benzylpenicillin by inhibiting its renal tubular secretion, an effect consistently documented in official labeling. Regarding pharmacodynamic interactions, the Dihydrostreptomycin component is documented to potentiate the effects of Neuromuscular Blocking Agents. Additionally, co-administration with other nephrotoxic agents is officially associated with an increased risk of severe nephrotoxicity. No specific interactions with food, alcohol, or supplements are documented in the regulatory labeling, nor are mandatory timing separation rules specified.

Mechanism of Action

Combiotic modulates the Receptor Activator of Nuclear Factor kappaB (RANK) / RANK Ligand (RANKL) / Osteoprotegerin (OPG) signaling pathway. The compound acts as a monoclonal antibody that exhibits high affinity for the RANK receptor expressed on the surface of pre-osteoclasts and mature osteoclasts. This binding event sterically inhibits the interaction between RANK and its primary ligand, RANKL, which is expressed by osteoblasts and stromal cells.

The inhibition of the RANK-RANKL axis blocks the key intracellular signaling cascade necessary for the differentiation, maturation, and survival of osteoclasts. This action subsequently decreases the rate of osteoclastogenesis and the molecular rate of bone resorption. Furthermore, the compound influences osteoblasts, contributing to the augmented expression of OPG, a soluble decoy receptor for RANKL. This observed dual influence results in a composite modulation of skeletal turnover, shifting the balance of bone remodeling processes.

Dosage and Administration Information

The administration of Combiotic is based on its formulation as a fixed-dose injectable suspension. The designated route of administration is primarily via deep intramuscular (IM) injection, although the subcutaneous (SC) route is utilized in certain regimens. Intravenous (IV) and intrathecal administration are restricted, forming a key constraint in the use protocol.

Dosing is determined by body weight (BW) for target species, including cattle, sheep, and pigs. The standard regimen is administered at a rate of 1 mL per 25 kg BW. This volumetric dose corresponds to a delivery of 8 mg of Procaine Benzylpenicillin and 10 mg of Dihydrostreptomycin Sulfate per kilogram. The schedule involves administration once daily (q.d.) for a standard course duration of up to three consecutive days.

Before drawing the dose, the Combiotic vial must be shaken vigorously to ensure the suspension is uniformly prepared. A critical procedural instruction relates to the injection volume per site: the procedure involves strict volume limits (e.g., 6 mL for cattle, 3 mL for sheep). If the calculated total dose exceeds these limits, the dose is divided and administered across multiple, separate injection sites. This administration technique supports the formulation's depot effect, which sustains drug levels to facilitate the once-daily dosing frequency.

Recent Clinical Evidence

Combiotic: Recent Clinical Evidence

The available research on Combiotic has primarily focused on its use in veterinary medicine, specifically looking at the combination of Benzylpenicillin and Dihydrostreptomycin and how it is observed in the bodies of various animals. The evidence base is structured around two main areas: analytical studies tracking the drug's movement, and experimental studies exploring its impact on specific bacteria.

Evidence for Systemic Bacterial Infections (General)

Research for generalized systemic infections was studied for using specialized analytical studies known as Pharmacokinetic (PK) studies. These studies research examined how the medicine's two main antibiotics are absorbed, where they travel, and how long they stay in the animal's system after injection. This type of research contributes to the broader evidence landscape used to characterize the drug's observed patterns. What remains uncertain is the evidence for the drug combination’s comparative performance. Comparative evidence is lacking; few data are available from formal, large-scale clinical outcome trials to compare patterns observed with the fixed combination against using the antibiotics individually.

Focus of Pharmacokinetic and Bioequivalence Research

Studies monitored outcomes reflecting daily functioning or activity level by observing drug levels in the bloodstream over defined time intervals. Bioequivalence studies were also conducted, and research describes patterns related to differences in how fast and how much of the drug was absorbed when comparing various commercial versions of the medication.

Evidence for Bovine Mastitis (Experimental Focus)

The evidence for the specific condition of Bovine Mastitis was primarily evaluated in controlled, small-scale in vivo pharmacological studies and laboratory-based In Vitro susceptibility testing. These research scenarios focused on assessing the combination's impact on bacterial growth.

Study of Microbial Clearance and Susceptibility

Researchers monitored outcomes linked to inflammatory or irritative states by examining the drug levels required to either inhibit or kill target pathogens (Minimum Inhibitory Concentration, MIC) in the lab. Findings were mixed across studies concerning the consistency of a truly synergistic antimicrobial effect when testing the combination in a living model.

Long-Term Studies and Follow-up

The majority of the research for Combiotic explored short-term symptom changes and acute drug disposition. Follow-up durations were limited, typically observing responses over defined time intervals of 24 to 72 hours for drug concentrations. Long-term effects are not fully established; there is limited information necessary to characterize the durability of response or the potential for pathogen resistance over extended periods.

Evidence in Special Populations

The research collected data across various species and different age strata, such as calves versus mature cattle, to assess how pharmacokinetic parameters were influenced by these differences. These studies monitored outcomes capturing phases of heightened symptom activity. Evidence quality varies across studies, and data for certain groups remain insufficient to draw broad conclusions. The results apply only to the populations studied.

What is Still Uncertain About Combiotic Research

The key limitations in the evidence base include insufficient comparative data. Comparative evidence is lacking to definitively establish that this fixed-dose combination demonstrates substantially different patterns of change than administering its individual components separately, a finding which was observed in some studies. Certainty remains low regarding the consistency of the synergistic antimicrobial effect in practical settings, as reported outcomes were short-term and based on small populations.

Frequently Asked Questions (FAQ)

Common questions about Combiotic (FAQ)


Q: How quickly does Combiotic start to work after the first dose?

A: Official information describes Combiotic as an injectable suspension designed with a depot effect. This design is intended to sustain drug levels in the system, which facilitates a once-daily dosing schedule. Research studies supporting the use of the drug have tracked drug levels in the bloodstream over periods ranging from 24 to 72 hours.


Q: Does Combiotic have a generic version available?

A: Research evidence for this combination has included Bioequivalence studies. These studies examine differences in how fast and how much of the drug is absorbed when comparing various commercial versions of the medication.


Q: What types of infections is Combiotic not effective against?

A: Combiotic is officially classified as an Antibiotic agent, containing components from the Beta-Lactam and Aminoglycoside classes. The drug is intended for use in bacterial infections. Official documents indicate it is not classified or officially indicated for use against non-bacterial infections, such as those caused by viruses or fungi.


Q: Is there a food that should be avoided when taking Combiotic?

A: Official regulatory labeling for Combiotic does not document specific interactions with food. Official regulatory labeling does not specify any mandatory food restrictions during the course of administration.


Q: Has Combiotic been approved by major regulatory bodies like the FDA or EMA?

A: Official documentation confirms that regulatory agencies, including the European Medicines Agency (EMA) and the US Food and Drug Administration (FDA), govern the use and labeling of this product. Its use is governed by regulatory documents, such as the Summary of Product Characteristics (in Europe) and the US Code of Federal Regulations (in the United States).


Q: Can Combiotic interact with my supplements or vitamins?

A: According to the official product information, specific interactions with supplements or vitamins are not documented in the regulatory labeling.


Q: Is the liquid form of Combiotic different from the tablet form?

A: Official information describes Combiotic as an injectable suspension (a liquid preparation in an aqueous vehicle) intended for deep intramuscular or subcutaneous injection. The regulatory documents do not describe a tablet form of the medication.


Q: What research is available on the long-term use of Combiotic?

A: Regulatory documents indicate that most research on Combiotic explored short-term symptom changes and how the drug moves through the body acutely. Official sources state that long-term effects are not fully established, and there is limited information to characterize the durability of response over extended periods.


Q: How long can I take Combiotic before needing a break?

-A: The standard course duration for administration is officially defined as up to three consecutive days. Official safety information documents that signs of toxicity affecting the kidneys and inner ear are associated with prolonged administration of high doses.


Q: What is the difference between Combiotic and just taking its individual components separately?

A: The research base has limitations, including insufficient comparative data to conclusively establish that this fixed-dose combination demonstrates substantially different patterns of change than its individual components administered separately. Official documents note that certainty remains low regarding the consistency of a truly synergistic (or enhanced) antimicrobial effect in practical settings.


Q: Does Combiotic carry a Black Box Warning, according to the FDA?

A: While the regulatory documents do not specifically use the term 'Black Box Warning,' the official safety profile documents serious adverse reactions considered significant risks. These documented serious reactions include Anaphylactic Shock, Neuromuscular Blockade, and Permanent Ototoxicity (hearing loss).


Q: Can a person who is breastfeeding use Combiotic?

A: Official eligibility documents relate to veterinary use. They specifically state that the use of Combiotic is prohibited in lactating ewes producing milk for human consumption. Use in human populations is not addressed in these veterinary regulatory documents.


Q: Are there different strengths of Combiotic available?

A: The standard regimen for Combiotic is defined at a precise rate corresponding to a fixed-dose delivery per kilogram of body weight. Official documents do not describe alternative strengths for the product.


Q: Does regulatory information mention any potential for drug dependence with Combiotic?

A: The official safety profile structure for this Fixed-Dose Combination (FDC) antimicrobial does not mention or include information regarding the potential for drug dependence.


Q: Can Combiotic be split or crushed, according to the label?

A: Combiotic is an injectable suspension for administration via injection. The product must be shaken vigorously before use to ensure a uniform mixture. Dose division is mentioned only in the context of complying with strict volume limits per injection site for injection, not preparation for oral administration.


Q: What are the possible interactions between Combiotic and herbal remedies?

A: According to the official product information, specific interactions with herbal remedies are not documented in the regulatory labeling.


Q: Are there specific patient groups that show better response to Combiotic in studies?

A: Official documents indicate that evidence quality varies across studies. Data for certain groups (such as specific age strata or animal species) remain insufficient to draw broad conclusions about a superior response pattern.


Q: Does the time of day matter when taking Combiotic?

A: The administration schedule is defined as once daily (q.d.) for up to three consecutive days. Mandatory timing separation rules or specific restrictions on the time of day for administration are not specified in the regulatory labeling.


Q: Can Combiotic interact with alcohol?

A: Official regulatory labeling does not document specific interactions with alcohol.


Q: What is the most important piece of safety information about Combiotic?

A: Official safety constraints define absolute contraindications that carry significant risk, such as a known hypersensitivity to penicillins or dihydrostreptomycin, and pre-existing renal impairment. Serious adverse reactions like anaphylactic shock are also documented in the safety information.


Q: How is 'off-label use' different from the approved use of Combiotic?

A: The approved use of Combiotic is officially defined by regulatory bodies and is strictly constrained by target species, organ function, and hypersensitivity history. Any use outside of the conditions and populations defined in the official regulatory labeling documents is considered an unapproved or 'off-label' use.

How should Combiotic be stored and disposed of?

The official requirements for storing and disposing of Combiotic (Penicillin G Procaine and Dihydrostreptomycin Sulfate Injectable Suspension) are defined by regulatory labeling.

Storage Conditions

The product must typically be stored at controlled room temperature (20 C to 25 C), although some formulations require refrigeration. It must be stored in a tight container under dry conditions. The suspension requires shaking well before use to ensure uniformity. To prevent accidental ingestion, the medication must be kept out of the sight and reach of children.

Disposal Instructions

Disposal should follow official guidelines, utilizing an authorized drug take-back program whenever possible. If unavailable, the unused medicine should be mixed with an undesirable substance (such as coffee grounds) and sealed before placing it in household trash. Used needles and syringes must never be thrown into household trash; they require disposal in a designated sharps container.

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

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