Acticlav

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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 Acticlav

Acticlav is a prescription-only, semi-synthetic fixed-dose combination antimicrobial product, systematically referred to by its generic names Amoxicillin/Clavulanate Potassium or Co-amoxiclav. Classified as a beta-lactam antibacterial agent, specifically a combination penicillin, its primary therapeutic purpose is to counter a broad spectrum of infections caused by susceptible bacteria.

Quick Facts Description
Active ingredients Amoxicillin trihydrate, Clavulanate potassium
Forms Tablet, capsule, oral suspension, powder for injection
Pharmacological Class Beta-Lactam antibacterial agent / Combination penicillin
General Purpose Countering systemic bacterial infections
Origin Semi-synthetic

Identity and Pharmacological Classification

The medicine is defined by its two constituent active ingredients: Amoxicillin trihydrate and Clavulanate potassium. Amoxicillin is an aminopenicillin antibiotic, derived from the core beta-lactam structure. Clavulanic acid, in contrast, is a potent beta-lactamase inhibitor, a component that has little antibacterial activity on its own but is essential for protecting the primary agent. This strategic dual-agent formulation is designed for extending the antibiotic’s activity against organisms that produce resistance enzymes, and it is clinically recognized for its role in treating common infections like those affecting the respiratory tract.

Composition and the Purpose of the Combination

The pairing is deliberate and designed to overcome a common mechanism of bacterial defense. The Amoxicillin component is the bactericidal agent that disrupts the construction of the bacterial cell wall, leading to bacterial death. However, many resistant strains produce beta-lactamase enzymes that chemically inactivate Amoxicillin. The Clavulanic acid component works by binding to and neutralizing these defensive enzymes, ensuring the Amoxicillin remains active. This synergistic effect of protection and attack enhances the drug's spectrum of activity against beta-lactamase-producing bacterial strains.

Available Forms and Administration Routes

Acticlav is supplied in various pharmaceutical forms that facilitate its utility as a systemic drug. These formulations include solid oral forms like tablets and capsules, liquid forms like oral suspension, and sterile powder preparations intended for reconstitution into a solution for intravenous injection or infusion. This diverse availability supports both oral and intravenous administration, providing clinical flexibility in patient care management, particularly for transitioning treatment from a hospital setting to home use.

What side effects are possible with Acticlav?

Possible Side Effects and Safety Information

Acticlav's safety profile is defined by officially documented adverse reactions classified by frequency and body system. The most commonly reported reaction is diarrhea, classified as very common. Other common effects include nausea, vomiting, and mucocutaneous candidiasis. Uncommon effects include dizziness, headache, indigestion, and minor, reversible elevations in liver enzymes (AST and/or ALT).


System-Organ-Class Groupings and Serious Reactions

Adverse effects are grouped across several systems, notably the Gastrointestinal and Hepatobiliary systems. Rare, but clinically significant events include serious allergic reactions like anaphylaxis and angioneurotic oedema, and severe skin reactions (e.g., Stevens-Johnson Syndrome). Hepatotoxicity (hepatitis and cholestatic jaundice) is also documented, which may be serious, though typically reversible.


Safety Constraints and Special Populations

Official labeling mandates that the medicine is contraindicated in individuals with a history of severe immediate hypersensitivity to any penicillin or prior use-associated hepatic dysfunction. Safety notes indicate that effects may be time-related; for instance, signs of hepatotoxicity can appear several weeks after treatment has stopped, and antibiotic-associated diarrhea may occur up to two months post-treatment. Caution is advised for elderly patients and those with renal or hepatic impairment, where dosage adjustment or contraindication may apply. Use is generally avoided if infectious mononucleosis is suspected.

Overdose and Emergency Response

Overdose and when to seek help

Overdose with Amoxicillin/Clavulanate Potassium (Acticlav) is formally documented in regulatory labeling as primarily presenting with acute gastrointestinal symptoms, including severe nausea, vomiting, and diarrhoea. These manifestations may lead to disturbances in the fluid and electrolyte balances, requiring clinical support.

Documented Risks and Emergency Response

A major concern at high exposure is the potential for severe, organ-specific outcomes. This includes the risk of amoxicillin crystalluria, where crystallization occurs in the urinary tract, and the possibility of convulsions (seizures), particularly in patients with impaired renal function. Additionally, severe hepatic events have been reported, which the official labeling notes are more prevalent in males and elderly patients.

Regulatory information mandates that for any suspected overdose, an individual must seek immediate medical attention and contact a doctor or present at the Emergency Department. Management is strictly symptomatic and supportive, as no specific antidote is documented. Official procedures include haemodialysis, which is documented as a measure that can remove the active ingredients from the systemic circulation, along with continuous monitoring of both renal and hepatic function.

Therapeutic Uses of Acticlav

What Acticlav Treats: Main Uses and Benefits

Acticlav is applied in clinical settings marked by heightened patient distress, used to address bacterial infections associated with the lungs, airways, ears, and nasal sinuses, and is also used for managing infections involving the skin, soft tissues, and urinary tract. This medication is applied across domains where additional symptomatic support is needed to help manage the bacterial infections that cause symptoms like fever, pain, and congestion.

This medication is generally used for conditions presenting with systemic or localized discomfort, assisting with maintaining functional stability and supporting the patient during difficult episodes by easing distress. It is considered relevant when supportive symptom management is appropriate, particularly in conditions characterized by periods of heightened symptoms, which may involve certain persistent bacterial challenges. A key aspect of management is that it supports the patient during difficult episodes by easing distress, which contributes to improved comfort during symptomatic periods.


Quick Fact: Focus on Symptomatic Relief

Acticlav helps address symptom clusters that may become intense or disruptive, contributing to easing the overall symptom load and helping patients cope more steadily.

Regulatory References

  1. NIH MedlinePlus Drug Information on Amoxicillin and Clavulanic Acid

Eligibility and Restrictions for Use

Eligibility to Use Acticlav

Acticlav (amoxicillin and clavulanate potassium) is an antibiotic combination indicated for bacterial infections. Regulatory documents define specific populations who should not use the medicine or for whom its use requires special consideration.


Contraindicated Populations (Must Not Use)

  • Persons with a history of a serious hypersensitivity reaction (e.g., anaphylaxis, Stevens-Johnson syndrome) to Acticlav, to any penicillin, or to other beta-lactam antibacterials (like cephalosporins).
  • Persons with a history of cholestatic jaundice or hepatic dysfunction (liver injury) associated with prior use of Acticlav.

Populations Requiring Special Consideration

Patient Condition Eligibility Status
Infectious Mononucleosis Use should be avoided due to a high risk of developing a non-allergic skin rash.
Hepatic Impairment Caution is necessary; patients should be monitored closely, and liver function tests may be required.
Renal Impairment Caution is necessary; dose adjustment and close monitoring are typically required, especially in severe impairment, as high levels of the medicine can accumulate. One extended-release formulation is contraindicated in patients with severe renal impairment (creatinine clearance less than 30 mL/min) and those on hemodialysis.
General Use Restriction Should not be used if susceptibility testing confirms the infection is treatable by amoxicillin alone (indicating non-beta-lactamase producing bacteria).

Eligibility for use is strictly defined by excluding patients with known severe allergies to the drug class or prior Acticlav-related liver injury. Use in patients with kidney or liver impairment, or mononucleosis, requires professional evaluation and careful monitoring.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This medication’s official interaction profile details specific pharmaceutical and substance combinations that require monitoring or present a risk of altered drug levels or effects.

Documented Interactions

Official regulatory information identifies clinically significant interactions with the following categories and specific medicinal products:

  • Oral Anticoagulants: Co-administration may affect the international normalized ratio (INR) or prothrombin time. Close monitoring of these blood parameters is required, and a dose adjustment of the anticoagulant may be necessary during treatment and upon discontinuation.
  • Probenecid: This medicine significantly decreases the renal tubular secretion of one component, leading to increased and prolonged plasma concentrations of that component. This combination is generally not recommended or requires careful consideration.
  • Methotrexate: The co-administration of this product can increase the plasma concentrations of methotrexate by reducing its renal clearance. Close patient monitoring is necessary to manage potential toxicities.
  • Allopurinol: Simultaneous use may increase the likelihood of developing skin reactions.
  • Oral Contraceptives: Official documentation notes that the efficacy of oral contraceptives may be reduced, and alternative contraceptive methods may need to be considered.

Other Constraints

High urinary concentrations of one component can result in false positive results for glucose in urine when copper reduction methods are used; enzymatic glucose oxidase methods should be utilized for accurate testing.

Mechanism of Action

Acticlav is a combination pharmacologic agent that functions through two distinct, complementary mechanistic domains to target bacterial physiology.

Disruption of Bacterial Cell Wall Synthesis

This domain is mediated by amoxicillin, a beta-lactam component that enters the bacterial periplasmic space and binds covalently to penicillin-binding proteins (PBPs). These PBPs are critical transpeptidases essential for catalyzing the cross-linking of the peptidoglycan layer during cell wall biosynthesis. This irreversible engagement initiates a molecular cascade that inhibits the final step of cell wall synthesis, resulting in the loss of structural integrity, subsequent osmotic imbalance, and cellular lysis.


Inhibition of Drug-Inactivating Enzymes

The second domain is the action of clavulanic acid, which operates as a mechanism-based, irreversible beta-lactamase inhibitor. Clavulanic acid acts as a suicide substrate by binding to the active site of beta-lactamase enzymes. This permanent inactivation of the hydrolytic enzymes prevents the breakdown of the amoxicillin component, thereby maintaining sufficient active amoxicillin concentrations to engage its PBP targets and carry out the core cellular disruption mechanism.

Dosage and Administration Information

Acticlav, the fixed-dose combination of Amoxicillin and Clavulanate Potassium, is administered systemically through two approved routes: oral forms (tablets, capsules, and suspension) and intravenous injection or infusion. The route used often aligns with the clinical context, with IV administration sometimes used to initiate therapy before transitioning to an oral regimen.

Official adult dosing regimens are structured on an 8- or 12-hour frequency pattern. For example, a common high-level regimen specifies 875 mg of the Amoxicillin component combined with 125 mg of Clavulanate, administered every 12 hours. Oral formulations are required to be consumed at the start of a meal. This administration timing is a mandatory condition intended to optimize the absorption of the clavulanate component and minimize potential gastrointestinal intolerance.

Treatment with Acticlav follows a time-bound protocol. The typical duration for a course is 7 to 10 days, and administration must not be extended beyond 14 days without a formal clinical review.

Population-specific rules define high-level adjustments necessary for certain patient groups. Patients with renal impairment (creatinine clearance le 30 mL/min) require a reduced dose or adjusted frequency, and the 875 mg/125 mg tablet strength is generally excluded for this group. Additionally, unique preparation instructions for liquid forms mandate that the suspension be properly reconstituted and shaken before each use to ensure accurate dosing.

Recent Clinical Evidence

Research evidence / Overview of Studies for Acticlav

The clinical evaluation of Acticlav (Amoxicillin/Clavulanate Potassium) is based on a body of research that includes Randomized Controlled Trials (RCTs), comparative studies, and systematic reviews. This evidence base, which regulators have reviewed, was developed by observing specific populations over defined time intervals to understand how symptoms evolved and what patterns were observed in patients with certain bacterial infections.

Evidence for Respiratory Tract Infections

Research was studied for infections that often involve the lungs, airways, ears, and nasal sinuses, which are conditions associated with acute or disruptive episodes. Studies were conducted during periods of increased symptom activity and monitored outcomes related to systemic or functional imbalance.

Research for Acute Otitis Media (Middle Ear Infection)

This area has been widely evaluated in clinical research involving pediatric patients. The research examined patterns related to symptom resolution and tracked how often the infection or related symptoms returned (recurrence rates). Research highlights changes measured during the study period. Long-term effects are not fully established regarding the cumulative impact of recurrent infection.

Evidence for Skin, Soft Tissue, and Urinary Tract Infections

Acticlav was observed in both clinical trials and observational studies that explored its application in conditions such as skin and soft tissue infections (SSTIs) and urinary tract infections (UTIs). For both, research examined outcomes related to microbiological eradication and clinical cure metrics. Data show patterns related to its use being heavily influenced by local pathogen resistance; for instance, in areas with high prevalence of certain resistant organisms, the evidence suggests its role for initial treatment may be limited.

What is Still Uncertain About Acticlav Research

The evidence base highlights what is known and what is still uncertain. A key limitation across many studies is that results apply only to the populations studied and do not determine whether an individual will respond similarly. The generalizability of findings can be challenged by the evolving nature of antimicrobial resistance (AMR). Additionally, for many conditions, the comparative evidence is lacking against all newer antibiotics, which makes further research into the evidence landscape an area where certainty remains low.

Frequently Asked Questions (FAQ)

Common questions about Acticlav (FAQ)

Q: What specific kinds of infections is Acticlav used for?

A: Regulatory documents indicate that Acticlav is officially used to treat infections caused by specific susceptible bacteria. These include infections of the lower respiratory tract, acute bacterial otitis media (middle ear infection), sinusitis, skin and skin structure infections, and urinary tract infections. This medicine is indicated for bacterial infections only, as it is not effective against viral infections.

Q: How quickly can Acticlav start working?

A: According to patient information, a person may notice that they begin to feel better during the first few days of treatment. While improvement is often observed early, completion of the prescribed course is necessary to clear the infection.

Q: Is it acceptable to stop using Acticlav once symptoms improve?

A: Official guidance advises that the medicine should be continued for the full duration of treatment as prescribed, even if symptoms start to improve sooner. Stopping the medicine early may prevent the complete elimination of bacteria, which is generally discouraged by official guidelines.

Q: Can Acticlav affect how birth control pills work?

A: Official documentation notes that when Acticlav is used at the same time as oral contraceptives (birth control pills), the effectiveness of the contraceptives may be reduced. Official documents indicate that alternative contraceptive methods may need to be considered while using Acticlav.

Q: Can Acticlav cause yeast infections?

A: Yes, mucocutaneous candidiasis, which is commonly referred to as a yeast infection, is listed in the official safety profile. This effect is classified as a common side effect in the official safety profile.

Q: Does Acticlav have different strengths or formulations?

A: Official product information confirms Acticlav is supplied in multiple strengths and pharmaceutical forms. These include various concentrations of tablets, as well as different concentrations of powder intended for reconstitution into an oral suspension (liquid form). The strength is based on the amount of the amoxicillin component.

Q: Is it common to feel tired while taking Acticlav?

A: Fatigue or tiredness is not listed as a common or very common side effect in the official safety profile for Acticlav. However, official documentation does list uncommon effects such as headache and dizziness. Patient resources sometimes note that the body's response to fighting an infection can also contribute to feelings of tiredness.

Q: Can Acticlav affect blood clotting?

A: While Acticlav is not indicated to affect general blood clotting, regulatory documents note that it can affect the International Normalized Ratio (INR) and prothrombin time in patients taking oral anticoagulants (blood thinners). For these patients, close monitoring of blood parameters is typically required.

Q: Is Acticlav used for conditions other than infections, based on official documents?

A: Official regulatory documents define the therapeutic purpose of Acticlav strictly for treating infections caused by susceptible bacteria. It is not indicated or approved for use in conditions that are non-infectious.

Q: What information is available about Acticlav's use in people with pre-existing allergies?

A: Regulatory documents state that Acticlav is contraindicated (must not be used) in people with a history of a severe immediate hypersensitivity reaction to any penicillin or to other similar antibacterial medicines. Official documents also require caution if a patient has other pre-existing allergic conditions, such as hay fever or asthma.

Q: Are there different brand names for the medicine Acticlav?

A: Yes, Acticlav is a brand name for the fixed-dose combination medicine Amoxicillin and Clavulanate Potassium. This combination is also widely known by its generic name Co-amoxiclav, and by other brand names, such as Augmentin.

Q: Does Acticlav require any special monitoring by a healthcare provider?

A: Yes, special monitoring is required for certain patient groups as defined in official labeling. This includes the close monitoring of kidney and liver function in patients with pre-existing impairment, and regular monitoring of blood clotting measures (INR) for patients taking oral anticoagulants.

Q: Can Acticlav be used for dental infections?

A: Acticlav is globally used and sometimes indicated for treating certain bacterial infections that affect the teeth or oral structures. This is consistent with its use for a range of bacterial infections as indicated in official uses.

Q: Is there a possibility of resistance developing to Acticlav?

A: Official documentation advises that Acticlav should only be used to treat infections that are strongly suspected or proven to be caused by susceptible bacteria. This approach is intended to reduce the risk of developing drug-resistant bacteria.

Q: How does Acticlav's eligibility differ for patients with kidney versus liver impairment?

A: The key difference is one of restriction: a history of prior liver injury (hepatic dysfunction) specifically related to the use of Acticlav is an absolute contraindication, meaning the person must not use it. For kidney impairment, caution, dose adjustment, and monitoring are required, but it may not be an absolute contraindication.

Q: Does official guidance mention anything about driving or operating machinery while using Acticlav?

A: Official labeling notes uncommon side effects such as dizziness and headache. Patients should know that these documented effects may potentially impact the ability to drive or operate machinery.

Q: Is Acticlav available over the counter?

A: Acticlav is designated as a prescription-only medicine (POM) by regulatory authorities. This means that it requires a valid prescription from an authorized healthcare professional to be dispensed.

Q: Are there specific instructions for the use of Acticlav liquid formulations?

A: Yes, specific patient information for the liquid suspension states that the bottle must be shaken well before each use. Additionally, a properly marked measuring device, such as a medicine spoon or oral syringe, is required to ensure the dose is measured accurately.

Q: Is Acticlav the same as generic versions of the drug?

A: Acticlav is the brand name for the combination of Amoxicillin and Clavulanate Potassium. Generic versions contain the same active ingredients and are required by regulatory bodies to meet the same quality, strength, and effectiveness standards as the original brand-name product.

Q: Is Acticlav used for viral infections?

A: No, Acticlav is classified as an antibacterial agent. Its purpose is defined strictly for treating infections that are caused by susceptible bacteria, and it has no efficacy against viral infections.

Q: What are the typical indications for Acticlav in respiratory tract infections?

A: Within the category of respiratory tract infections, specific indications for Acticlav include lower respiratory tract infections, acute bacterial otitis media (middle ear infection), and sinusitis. These are the common conditions officially listed for treatment with this medicine.

Q: What are the official guidelines regarding alcohol consumption and Acticlav?

A: The official product labeling for Acticlav does not include a dedicated warning or contraindication regarding the consumption of alcohol. If patients have specific concerns, they may wish to consult a healthcare provider for information relevant to their situation.

Q: Are there specific times of day Acticlav is generally recommended to be taken?

A: Official adult dosing regimens are structured on frequency patterns, such as every 8 or 12 hours. However, there is no mandated specific time of day (morning, noon, or night). The critical timing requirement is that all oral forms must be consumed at the start of a meal.

Q: What if I vomit shortly after taking Acticlav?

A: If vomiting occurs shortly after a dose, professional guidance is needed. Advice from a healthcare professional will determine whether to wait until the next scheduled dose or if any action is needed for the previous dose.

Q: What types of food or drink are mentioned in official guidance regarding Acticlav?

A: Official guidance mandates that the oral formulations of Acticlav must be consumed at the start of a meal. This timing is a required condition intended to optimize the absorption of one component and help minimize potential gastrointestinal intolerance. No specific foods are restricted.

How should Acticlav be stored and disposed of?

Acticlav (Amoxicillin/Clavulanate Potassium) must be stored and disposed of according to strict regulatory requirements to maintain its stability.

Official Storage Conditions

Formulation Required Condition
Tablets and Dry Powder Store at controlled room temperature (20 C to 25 C), protected from light and moisture. Keep container tightly closed
Reconstituted Suspension Must be stored in a refrigerator. Do not freeze

The reconstituted oral suspension has a limited shelf-life and must be discarded after 10 days of refrigeration. All forms must be kept out of the sight and reach of children.

Official Disposal Instructions

Unused or expired Acticlav should be disposed of primarily through an authorized drug take-back program. If one is unavailable, the medication must be mixed with an undesirable substance (such as used coffee grounds) and sealed in a container before being placed in household trash. It is prohibited to flush the medicine down the toilet unless explicitly instructed by the official labeling.

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

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