Clamicil

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Clamicil

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Medically reviewed

Marina Burgos

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 Clamicil

What is Clamicil? A Combined Antibacterial Preparation

Property Description
Active ingredient Amoxicillin, Clavulanic acid
Form Film-coated tablet, Oral suspension, Sterile powder for injection
Pharmacological class beta-Lactam antibacterial agent
Common use Systemic bacterial infections
Origin Semi-synthetic (Amoxicillin) & Natural derivative (Clavulanic acid)

Clamicil is a combined antibacterial preparation known generically by the international non-proprietary name (INN) Amoxicillin and Clavulanate Potassium. It is fundamentally classified as a beta-Lactam antibacterial agent and is primarily used to address a wide array of systemic bacterial infections. This dual-agent formulation is clinically recognized for its increased efficacy against penicillin-resistant organisms. The strategic combination is considered a standard for antibiotic resistance management, making it a key component of the WHO Model List of Essential Medicines.

Composition: The Amoxicillin and Clavulanic Acid Combination

The medicine is defined by its two principal active ingredient(s): Amoxicillin and Clavulanic acid (supplied as the potassium salt). Amoxicillin is a semi-synthetic penicillin antibiotic, while Clavulanic acid acts as a protective molecule derived from the fermentation product of Streptomyces clavuligerus. This combination is widely used globally and is manufactured in various dosage form(s), including the film-coated tablet and powder for oral suspension, catering to both oral and parenteral routes of administration.

How Does Clamicil Generally Benefit the Patient?

Clamicil benefits the patient by enhancing the effectiveness of the antibiotic through a robust synergistic effect. Amoxicillin performs the necessary bactericidal action by destroying the bacterial cell wall, but only Clavulanic acid, acting as a potent beta-lactamase inhibitor, ensures this action can occur successfully against resistant microbial pathogens. The general purpose of this protected mechanism is the reliable elimination of the infection, particularly in situations where the causative bacteria have developed the capacity to inactivate standard penicillin antibiotics.

Regulatory References

  1. WHO Model List of Essential Medicines
  2. Amoxicillin Clavulanate - StatPearls - NCBI Bookshelf

What side effects are possible with Clamicil?

Clamicil: Possible Side Effects and Safety Information

This section summarizes the officially documented adverse reactions and safety restrictions for Clamicil, based on regulatory labeling.


Adverse Reactions and System-Organ Classes

The most frequently reported adverse reactions identified in clinical studies include gastrointestinal issues such as diarrhea or loose stools (up to 9%), nausea (up to 3%), and vomiting (up to 1%). Other common issues involve the skin and subcutaneous tissue, including rashes and urticaria (up to 3%), particularly in patients with mononucleosis, for whom Clamicil use should be avoided.

Serious adverse reactions, though less frequent, include life-threatening anaphylactic reactions which can be fatal, and Severe Cutaneous Adverse Reactions (SCAR). Gastrointestinal complications include the serious risk of Drug-Induced Enterocolitis Syndrome (DIES) and potentially severe Clostridium difficile-associated diarrhea (CDAD), which may occur up to two months after treatment cessation.


Safety Restrictions and Limitations

Contraindications include a history of a serious hypersensitivity reaction to Clamicil or to other beta-lactam antibiotics, such as cephalosporins or penicillins.

Population-Specific Safety: Dosage adjustments are mandatory for patients with severe renal impairment (Glomerular Filtration Rate < 30 mL/min). Caution is advised in pediatric patients under three months of age due to incompletely developed renal function. The drug is excreted in human milk, which carries a risk of sensitization for the nursing infant.

Exposure and Dose: Overdosage may lead to crystalluria and interstitial nephritis; adequate fluid intake and diuresis are necessary to manage crystalluria. The use of certain combination product regimens is associated with significantly less diarrhea than others.


High-Level Safety Summary

The regulatory profile mandates careful monitoring for signs of hypersensitivity and severe gastrointestinal events. Risk management focuses on screening for prior beta-lactam allergies and adjusting the dosage in the presence of compromised renal function.

Overdose and Emergency Response

Overdose and When to Seek Help

The following information details the officially documented manifestations of overdose with Clamicil (Amoxicillin and Clavulanate Potassium) and the emergency actions mandated by regulatory authorities.


Documented Overdose Manifestations and Actions

Classification Official Regulatory Statement
Documented Manifestations Gastrointestinal symptoms (e.g., vomiting, diarrhea, abdominal pain) are the most common signs documented. High doses can lead to crystalluria (amoxicillin crystals in the urine), potentially causing renal issues.
Severe Outcomes Convulsions (seizures) and renal impairment/failure are formally noted risks, particularly in patients with existing impaired renal function or those receiving very high doses.
Antidote Availability No specific antidote is known for overdose with this combination.
Supportive Management Management is restricted to symptomatic and supportive treatment. In severe cases, haemodialysis is a documented procedure that can effectively remove the active ingredients from the circulation.

When to Seek Immediate Medical Help

Regulatory guidance explicitly mandates that all suspected overdose scenarios require the patient to seek immediate medical attention. This action is critical when severe symptoms, such as convulsions or signs indicative of acute renal failure (e.g., reduced urine output), are present. Hospital monitoring may be required to manage the symptoms and monitor for complications, especially for individuals documented to be at higher risk due to impaired kidney function.

Therapeutic Uses of Clamicil

What Clamicil Treats: Main Uses and Benefits

Clamicil is commonly used to help manage symptoms and promote recovery from a range of bacterial infections. Its therapeutic areas cover conditions characterized by periods of heightened symptoms in the lower respiratory tract, acute otitis media (ear infections), urinary tract, and skin/soft tissues. This treatment is relevant in clinical settings that involve acute or disruptive symptom patterns, and its therapeutic approach contributes to easing the overall symptom load and helps improve day-to-day comfort.


Easing Symptom Burden and Supporting Stability

Clamicil helps address symptom clusters that may become intense or disruptive, such as fever, systemic imbalance, and localized pain or inflammation. The medication is applied during phases of increased distress or discomfort when symptoms interfere with daily functioning. The short-term symptomatic assistance is relevant when symptoms become temporarily overwhelming and supportive relief is needed. Managing these symptoms related to inflammatory or irritative states supports the patient during episodes of heightened discomfort and assists with maintaining functional stability.


Quick Fact: Relief for Physical Discomfort

Clamicil is relevant for easing symptoms related to physical discomfort and systemic imbalance associated with infection, helping patients cope more steadily with difficult episodes.

Eligibility and Restrictions for Use

Who Can and Cannot Use Clamicil?

The population eligibility for using Clamicil (Amoxicillin and Clavulanate Potassium) is strictly defined by regulatory authorities.

Absolute Contraindications

Clamicil is contraindicated and must not be used in individuals with a history of serious hypersensitivity reactions (e.g., anaphylaxis) to penicillins or any other beta-lactam antibacterial drugs. It is also prohibited for patients with a previous history of cholestatic jaundice or hepatic dysfunction specifically related to prior use of Amoxicillin/Clavulanate.

Restricted and Conditional Use

Population Group Regulatory Status
Age and Weight Use is established for adults ge 40 kg and pediatric patients ge 3 months. Infants < 12 weeks require modified dosing.
Organ Impairment Requires caution in hepatic impairment. Patients with severe renal impairment ( CrCl < 30 mL/ min) require specific dose adjustment.
Comorbidities Use should be avoided in patients with infectious mononucleosis. Specific formulations containing aspartame should be considered by individuals with Phenylketonuria (PKU).
Pregnancy/Lactation Classified as FDA Pregnancy Category B. Use during pregnancy is restricted to when clearly needed. Caution is advised when breastfeeding.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The following section outlines documented interactions between Clamicil (amoxicillin and clavulanate potassium) and other medicinal products or laboratory tests, as stipulated in official regulatory documents.

Documented Interacting Agents

Product Category Specific Interacting Medicines Interaction Implication
Oral Anticoagulants Warfarin, Acenocoumarol, Phenprocoumon May increase the International Normalized Ratio (INR) or prothrombin time, requiring careful monitoring.
Uricosurics Probenecid Avoid; significantly increases and prolongs amoxicillin blood levels by decreasing its renal excretion.
Xanthine Oxidase Inhibitors Allopurinol Avoid; increases the incidence of skin rash development.
Other Antibacterials Tetracyclines Bacteriostatic drugs may interfere with the bactericidal effect of Clamicil.
Hormonal Contraceptives Oral Contraceptives May reduce the efficacy of the contraceptive.

Procedural and Contextual Constraints

When co-administered with oral anticoagulants, close and frequent monitoring of coagulation parameters is required. Clamicil may also interfere with certain laboratory tests, potentially causing false positive results in tests for glucose in urine using copper reduction methods (e.g., Benedict's or Fehling's solution). Enzymatic glucose oxidase tests should be utilized instead for accurate results.

Mechanism of Action

Clamicil is a specific monoclonal antibody that binds directly to the Receptor Activator of Nuclear Factor Kappa-B Ligand (RANKL). This binding interaction prevents RANKL from engaging its primary receptor, RANK (Receptor Activator of Nuclear Factor Kappa-B), on the surface of osteoclast precursor cells. The competitive binding effectively inhibits the RANKL/RANK signaling axis. This modulation blocks the downstream activation of NF-κB and other transcription factors necessary for osteoclast differentiation, maturation, and survival. Consequently, the formation and activity of mature, bone-resorbing osteoclasts are suppressed. At a system level, the suppression of osteoclastogenesis and the resulting decrease in bone resorption activity shifts the physiological balance toward bone formation, reducing the overall rate of bone matrix breakdown. This effect is confined entirely to the molecular signaling pathways governing osteoclast activity.

Dosage and Administration Information

How to Use Clamicil

Clamicil (Amoxicillin and Clavulanate Potassium) is administered via two principal routes: oral and intravenous (IV). The choice of route is typically based on the severity of the infection and the patient's ability to tolerate oral medication. The oral forms include film-coated tablets and powder for oral suspension, while the IV route utilizes a sterile powder for injection.

Oral administration follows a precise time-relationship concept: doses must be taken at the start of a meal to enhance the absorption of the clavulanate component and minimize potential gastrointestinal discomfort. Standard adult dosing regimens vary, often involving administration two or three times daily (BID or TID), depending on the specific strength prescribed. Treatment is generally short-term, with the official course typically lasting 7 to 10 days and not exceeding 14 days without clinical review.

Administration and Adjustment Principles

The dosage for children weighing less than 40 kg is determined based on the child’s body weight (mg/kg/day). A crucial procedural rule involves dose adjustment for patients with renal impairment: a reduction in dose and/or an increase in the dosing interval is required when creatinine clearance is below a specified threshold. For the IV route, the sterile powder must be reconstituted and diluted according to label instructions and administered as either a slow injection over a few minutes or an infusion over 30 to 40 minutes. If an oral dose is missed, it should be taken as soon as it is remembered, then waiting approximately four hours before the next scheduled dose, strictly avoiding taking two doses simultaneously. This adherence to administration conditions and adjustments formalizes the standardized use of the medicine.

Recent Clinical Evidence

Research evidence / Overview of studies for Clamicil


Evidence Base for Acute Otitis Media (Ear Infections)

The clinical evaluation of Clamicil in Acute Otitis Media (AOM), or ear infections, was largely performed through Randomized Controlled Trials (RCTs) and subsequent Systematic Reviews. Research examined outcomes related to physical discomfort and tracked changes in symptoms like ear pain and fever in children across various age groups.

Findings describe patterns observed in studies related to clinical success rates and measurements of primary endpoint non-attainment. Synthesis reports indicate that the evidence quality varies across studies, and some older research has an unclear risk of bias. Evidence is limited from studies that track the initial hours of treatment, particularly related to how pain was measured during the first 24 hours.

Evidence Base for Lower Respiratory Tract Infections (LRTI)

Research exploring Clamicil for Lower Respiratory Tract Infections (LRTI), including Community-Acquired Pneumonia (CAP), has been conducted using multiple Randomized Controlled Trials and Systematic Reviews. Research monitored outcomes such as clinical success rates and microbiological success measurements in various patient groups, including older adults.

One key limitation is the lack of extensive trials that directly compare the combination drug to amoxicillin alone for CAP in certain adult populations. Additionally, the available evidence often focuses on comparability (non-inferiority) with other broad-spectrum antibiotics rather than definitive superiority.


What Research Gaps and Uncertainty Exist

The evidence landscape includes several areas where certainty remains low. The primary limitation is that follow-up durations were limited in many studies, resulting in limited information for long-term effects and the incidence of symptom recurrence.

Comparative evidence is lacking in trials that directly test the combination drug against standard amoxicillin in all approved indications, especially where the likelihood of bacterial resistance is low. Data for certain groups, such as those with specific comorbid conditions, remain insufficient or are often extrapolated from general adult population studies.

Key Studies & References

  1. Amoxicillin/Clavulanate Potassium Tablets - FDA Label and Drug Information

Frequently Asked Questions (FAQ)

Common questions about Clamicil (FAQ)

Q: How does Clamicil differ from other similar medicines I've seen advertised?

Official documents describe Clamicil as a combination product containing Amoxicillin and Clavulanate Potassium. The Clavulanate component is a special additive included to protect the Amoxicillin from inactivation by beta-lactamase enzymes.

This combination is designed to make the antibacterial agent active against bacteria that have developed resistance to Amoxicillin alone.


Q: Is it normal to feel a mild headache or dizziness when starting Clamicil?

According to regulatory documents, headache and dizziness are reported side effects, but they are generally classified as uncommon or rare.

Uncommon reactions are documented to occur in up to 1 in 100 people, according to the standard classification used in official documents.


Q: How quickly does Clamicil start to show its effects?

Studies and official information indicate that the maximum concentration of the active ingredients in the bloodstream is reached approximately one to two and a half hours after taking an oral dose.

This pharmacokinetic data describes the rate at which the medicine may be absorbed into the system.


Q: What is the typical timeframe for seeing the full benefit of Clamicil?

The typical timeframe for the full therapeutic course of Clamicil is usually 7 to 10 days, though the duration can vary depending on the condition being treated.

Official prescribing information indicates that treatment is generally not recommended to be extended beyond 14 days without a clinical review.


Q: Is Clamicil available in different strengths?

Yes, the medicine is manufactured in various strengths and dosage forms, with the specific strength determined based on the patient's prescribed regimen.

This includes a range of tablet strengths for adults and specific ratios used for the powder for oral suspension.


Q: Is it important to take Clamicil at the exact same time every day?

Official administration instructions specify that doses are indicated to be taken at the start of a meal to enhance absorption and minimize digestive discomfort.

The required timing, such as two or three times daily (BID/TID), is intended to help maintain consistent therapeutic levels throughout the treatment course.


Q: What is the typical shelf life of Clamicil?

The shelf life for the unopened film-coated tablets and dry powder for suspension is determined by regulatory labeling, typically ranging from 18 to 36 months from the date of manufacture.

Once the powder for oral suspension is mixed with water, official directions indicate it must be stored under refrigeration and should be discarded after 10 days.


Q: Can Clamicil make a person feel more tired or drowsy?

While fatigue or sleepiness is not classified as a common side effect in regulatory documents, the official label does mention dizziness as an uncommon adverse reaction.

Other central nervous system effects are also documented as rare.


Q: What are the warnings about driving or operating machinery while using Clamicil?

Official warnings state that Clamicil may cause certain side effects, such as dizziness or convulsions, that could impact a person's ability to drive or operate machinery safely.

Warnings about these effects are included so the potential impact on such activities is recognized.


Q: How long does Clamicil stay in a person's system after the last dose?

According to the pharmacokinetics section of the prescribing information, the half-life of amoxicillin is approximately 1 to 1.5 hours, and the half-life of clavulanate is approximately 1 hour.

The half-life is the time it takes for the drug concentration in the body to be reduced by half.


Q: Is Clamicil considered a controlled substance in the US or other countries?

Official drug databases and regulatory scheduling agencies confirm that Amoxicillin and Clavulanate Potassium is generally not scheduled as a controlled substance in the U.S. or in most regulated international markets.


Q: Does Clamicil have a 'boxed warning' or 'black box warning' from the FDA?

The official FDA label for Amoxicillin and Clavulanate Potassium does not include a Boxed Warning.

A Boxed Warning, sometimes called a Black Box Warning, is the strictest warning included in the labeling of prescription drugs or drug products when there is serious safety information to communicate.


Q: Is Clamicil available over the counter?

Clamicil is classified by regulatory authorities as a prescription-only medicine (Rx) in the United States and in most regulated global markets.

It is not available for purchase over the counter.


Q: What should a patient do if they notice signs of an allergic reaction to Clamicil?

Official safety sections indicate that if a serious hypersensitivity reaction (like anaphylaxis) occurs, the medicine is indicated to be discontinued immediately.

The instructions for managing such a reaction state that immediate, appropriate medical therapy is required.


Q: Does Clamicil contain lactose or other common allergens?

Regulatory documents contain a full list of all inactive ingredients (excipients) used in each specific product formulation. These ingredients may include common components like lactose or starch.

Official warnings also note that certain formulations contain aspartame, which is a specific warning for individuals with Phenylketonuria (PKU).


Q: Is there any data suggesting Clamicil might affect fertility in men or women?

Preclinical safety studies conducted on animals have indicated no direct or indirect harmful effects with respect to fertility or reproductive performance.

Official information related to human fertility is not typically a focus of these labels.


Q: Are there any special warnings for people with a history of seizures using Clamicil?

Official warnings state that convulsions (seizures) are listed as a possible effect.

This is particularly noted in patients with impaired renal function or in those who are receiving high doses.


Q: Does Clamicil have a high potential for misuse or dependence?

Regulatory safety profiles indicate that Clamicil is generally not associated with a risk of abuse or the development of physical dependence.

This is consistent with its classification as an antibacterial medicine.

How should Clamicil be stored and disposed of?

Clamicil's storage requirements vary by product form, as mandated by regulatory labeling.

Tablets and Dry Powder Storage

  • Temperature: Must be stored at Controlled Room Temperature (20 C to 25 C / 68 F to 77 F) [1].
  • Protection: Store in the original container, tightly closed, protected from light and moisture [2].

Reconstituted Oral Suspension Storage

  • Refrigeration: The liquid suspension must be stored under refrigeration (2 C to 8 C) and must not be frozen [3].
  • Stability: The reconstituted product must be discarded after 10 days [3].

General Handling and Disposal

  • Child Safety: All forms must be kept out of the sight and reach of children [4].
  • Disposal: Unused or expired medication should be disposed of in household trash after being mixed with an undesirable substance (e.g., coffee grounds, dirt) [5]. The medication must not be flushed down a sink or toilet unless explicitly instructed to do so [5]. All personal information on the label must be scratched out before discarding the packaging [5].

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

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