Stemox

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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 Stemox

Quick Facts: Stemox (Co-amoxiclav)

Property Description
Active Ingredients Amoxicillin and Clavulanic Acid
Form Oral Tablets, Oral Suspension, Powder for Injection
Pharmacological Class Aminopenicillin combined with a Beta-lactamase Inhibitor
Common Use Treating Bacterial Infections
Origin Semisynthetic

What is Stemox and What Type of Medicine is It?

Stemox is a potent antibacterial agent, commonly referred to as an antibiotic, which is classified as a combination product. It belongs to the aminopenicillin class of antibiotics used in conjunction with a beta-lactamase inhibitor. The combination is recognized globally as Co-amoxiclav and is classified as an essential medicine.

This formulation is clinically recognized for its versatility in treating broad categories of bacterial infections, such as those affecting the respiratory tract or skin structures. Stemox is a prescription-only medicine, underscoring its therapeutic potency and necessity for medical oversight.


Core Composition and Available Forms

Stemox is composed of two active ingredients, Amoxicillin and Clavulanic Acid, which are derived from a semisynthetic process. Amoxicillin acts as the primary antibiotic, while Clavulanic Acid serves as an auxiliary protector.

The combination of these two agents is crucial for overcoming bacterial resistance to Amoxicillin alone. The dual composition is significant for maintaining consistent therapeutic efficacy. Stemox is formulated for both oral and systemic intravenous route of administration, available as tablets, an oral powder for suspension, and a sterile powder for injection.


What is the General Therapeutic Purpose of the Combination?

The general therapeutic purpose of combining these agents is to strategically overcome bacterial resistance, allowing the drug to function as a highly effective broad-spectrum antimicrobial. The auxiliary Clavulanic Acid prevents the enzymatic destruction of Amoxicillin, thereby restoring the antibiotic's potency. This unique defense mechanism ensures the successful elimination of susceptible microbes and fulfills the general role of treating a wide range of bacterial infections.

Regulatory References

  1. WHO Model List of Essential Medicines - 23rd List (2023) PDF

What side effects are possible with Stemox?

Possible Side Effects and Safety Information

The safety profile of Stemox (Co-amoxiclav) is classified according to the frequency and type of documented adverse reactions. These classifications are defined by official government regulatory documents.


Frequency-Classified Adverse Reactions

The most commonly reported adverse effects are typically related to the Gastrointestinal System.

Frequency Category Associated Adverse Reactions (Examples)
Very Common (> 1 in 10) Diarrhoea (primarily in adults)
Common (≤ 1 in 10) Nausea, Vomiting, Mucocutaneous candidiasis (thrush)
Uncommon (≤ 1 in 100) Skin rash, Pruritus, Indigestion, Dizziness, Headache

Serious Adverse Reactions and Safety Constraints

Official labeling documents the potential for rare but serious adverse reactions, which are vital components of the drug's safety profile. These include life-threatening Hypersensitivity Reactions such as anaphylaxis and severe skin conditions like Stevens-Johnson syndrome (SJS), classified in regulatory documents as Not Known frequency (cannot be estimated from available data).

Safety notes specify potential effects on the Hepatobiliary System (liver and bile ducts), including cholestatic jaundice and hepatic dysfunction, which can be severe and may be delayed in onset. Furthermore, treatment has been associated with severe forms of diarrhea, such as Clostridioides difficile-associated diarrhoea (CDAD).

Population-Specific Considerations are noted for individuals with underlying health issues. Caution and monitoring are required for those with hepatic impairment, and dose adjustments are necessary for severe renal impairment, as impaired kidney function can increase the likelihood of convulsions.

Overdose and Emergency Response

Overdose and when to seek help

The following information details the officially documented signs of overdose for Stemox (Amoxicillin/Clavulanic Acid) and the regulator-mandated emergency actions.

Documented Overdose Manifestations

Element Official Regulatory Description
Overdose Presentations Primarily includes gastrointestinal symptoms such as stomach pain, vomiting, and diarrhea. Signs of renal dysfunction, such as greatly decreased urination or the presence of bloody or cloudy urine, are also documented.
Severe Outcomes The most serious documented risks are convulsions (or seizures), especially in patients with impaired renal function, and acute renal failure resulting from amoxicillin crystalluria. Disturbances of fluid and electrolyte balance may also occur.

Mandated Emergency Actions

Official regulatory guidance strictly advises to seek emergency medical attention immediately or call a Poison Control helpline if an overdose is suspected. Immediate medical help is required for any severe manifestation, specifically if the person has seizures, trouble breathing, collapses, or cannot be awakened. Management is symptomatic and supportive, as no specific antidote is known. Procedures such as hemodialysis may be used to effectively remove the drug from circulation. Monitoring of renal and hepatic function is advised.

Therapeutic Uses of Stemox

The medication is a type of antibacterial medicine used across various clinical domains where the infection is caused by susceptible bacteria, and is applied when appropriate for managing bacterial infections. It is commonly used for managing bacterial infections of the ears, lungs, sinus, skin, and urinary tract.


What Stemox Treats: Main Uses and Benefits

Stemox (Co-amoxiclav) may be part of symptomatic management in situations involving certain distressing symptoms that arise from bacterial illnesses. It is applied in addressing symptom clusters that may become intense, such as fever, physical discomfort, and localized swelling or redness. This antibacterial agent is commonly used across conditions presenting with acute episodes, including pneumonia, acute otitis media, rhinosinusitis, cellulitis, and dental abscesses.


The drug supports general well-being during symptomatic phases when symptoms interfere with daily functioning and is commonly used during phases when symptoms become more noticeable from conditions like animal bite wounds or diabetic foot infections. This supportive use contributes to improved comfort during periods of heightened symptoms.

Quick Fact: Focus on Symptomatic Support
Primary Benefit Contributes to easing the overall symptom load.
Symptom Focus Helps manage fever, pain, swelling, and redness associated with localized infection.

Regulatory References

  1. NIH MedlinePlus overview of Amoxicillin and Clavulanic Acid

Eligibility and Restrictions for Use

Stemox (Co-amoxiclav) is a prescription-only antibacterial agent, and its use is governed by strict regulatory eligibility rules established by government health authorities worldwide.

Who Must Not Use Stemox (Contraindications)

Use is strictly prohibited for individuals with a history of hypersensitivity to any penicillin, amoxicillin, or clavulanic acid. This prohibition also extends to patients with a history of severe immediate allergic reactions to other beta-lactam antibiotics (e.g., cephalosporins). Furthermore, Stemox is contraindicated in individuals who have previously experienced jaundice or hepatic dysfunction associated with the use of this drug combination.

Restrictions and Conditional Use

Eligibility is conditional on various patient factors:

  • Organ Function: Patients with severe renal impairment (creatinine clearance <30 mL/ min) are restricted from using specific high-dose formulations, and those with hepatic impairment require cautious use and monitoring.
  • Comorbid Conditions: Use is not recommended for patients with infectious mononucleosis or lymphatic leukemia due to the associated risk of skin rash.
  • Maternal Status: Use during pregnancy should be avoided unless deemed essential. While generally permitted during lactation, warnings regarding potential effects on the infant are documented.
  • Age Groups: Although adults are generally eligible, specific forms are not recommended for children weighing less than 40 kg or for infants younger than 3 months.

What should I know about interactions with other medicines?

Stemox (Amoxicillin and Clavulanic Acid) has officially documented interaction patterns that are classified by regulatory authorities based on their effects on drug exposure and systemic activity. The co-administration of Stemox with Probenecid is not recommended because Probenecid inhibits the renal elimination of Amoxicillin, resulting in increased and prolonged blood levels of Amoxicillin. This is described as a renal transporter-mediated interaction.

For patients taking Methotrexate, penicillins such as the Amoxicillin component may compete for renal tubular secretion, thereby reducing Methotrexate excretion and potentially increasing the risk of its toxicity. The use of Stemox with Oral Anticoagulants, such as Warfarin, has been associated with an increased International Normalised Ratio (INR); regulatory documents therefore require close monitoring of coagulation metrics during co-administration.

Other documented exposure modifications include a reported reduction in the pre-dose concentration of the active metabolite of Mycophenolate Mofetil following Stemox commencement. Additionally, the efficacy of Combined Oral Contraceptives may be reduced. When taken with Allopurinol, the risk of developing allergic skin reactions is officially documented as being increased.

Regarding non-medicinal products, the absorption of the Clavulanic Acid component is optimised when taken with food. Therefore, regulatory instructions recommend taking Stemox at the start of a meal to help minimise potential gastrointestinal intolerance and ensure proper absorption.

Mechanism of Action

How Stemox Works

Stemox (Co-amoxiclav) acts through two synergistic pharmacodynamic mechanisms that result in the elimination of susceptible bacteria.


Blocking the Bacterial Cell Wall Construction

The primary component, Amoxicillin, functions as an irreversible covalent inhibitor of bacterial Penicillin-Binding Proteins (PBPs), a class of enzymes crucial for the final stages of cell wall biosynthesis. By blocking the peptidoglycan cross-linking step, Amoxicillin compromises the structural integrity of the bacterial cell wall. This molecular intervention leads directly to the loss of osmotic stability, resulting in bacterial cell lysis and death.


️ Overcoming Enzymatic Resistance

Clavulanic Acid serves as a mechanism-based, or suicide, inhibitor of specific bacterial beta-lactamase enzymes. These enzymes hydrolytically destroy the beta-lactam ring of Amoxicillin. By irreversibly deactivating the beta-lactamases, Clavulanic Acid shields Amoxicillin from degradation. This synergistic interaction restores the full PBP-inhibitory action of Amoxicillin against strains that produce this defense enzyme, allowing the cell wall inhibition mechanism to proceed successfully against a broader population of organisms.

Dosage and Administration Information

How to Use Stemox: Official Administration Guidelines

Stemox (Amoxicillin/Clavulanate) is administered according to fixed, standardized protocols focusing on the route, frequency, and timing of the dose.


Administration Scope

Instruction Entity Detail (Official Administration Guidelines)
Route of administration Primarily Oral (tablets, suspension). Intravenous (IV) is used for systemic therapy via powder for injection.
Dosing schedule Administered on a fixed schedule, typically every 12 hours or every 8 hours, based on the formulation ratio and the required Amoxicillin dose.
Timing in relation to meals Dosing should occur at the start of a meal to enhance the absorption of the clavulanate component and minimize potential gastrointestinal intolerance.
Special procedural conditions Extended-release tablets must be swallowed whole and cannot be crushed or chewed. Oral suspension must be reconstituted with water and shaken well prior to each dose.

Population-Specific Use

Dose modifications are utilized for specific patient groups to prevent drug accumulation and ensure proper exposure. For pediatric patients under 40 kg, the dose is calculated by body weight (mg/kg/day), based on the Amoxicillin component. A critical adjustment is required for patients with renal impairment; specific high-dose and extended-release tablets must not be used in patients with a creatinine clearance (CrCl) of less than 30 mL/min.

Course Duration

The typical duration of therapy ranges from 7 to 14 days, though longer courses of up to 21 days may be administered for more severe or refractory conditions.

Recent Clinical Evidence

Stemox: Recent Clinical Evidence

Phase III Clinical Trials

Research has explored the investigational mechanism of Stemox, which involves selectively inhibiting a specific enzyme pathway. Studies have focused primarily on severe, chronic fatigue, and have also investigated its use in managing a range of inflammatory conditions.

  • Study A (Chronic Fatigue Syndrome): Research explored whether the drug evaluated its association with changes in the symptoms of severe, chronic fatigue across 500 participants over 12 weeks. The trial was randomized and double-blind. The research examined outcomes related to changes in pain and the time to reported change in the first week of treatment.
  • Study B (Inflammatory Markers): Clinical trials evaluated whether participants experienced a change in pain levels in a cohort of 350 participants with an elevated inflammatory marker. Studies compared combination-drug treatment with monotherapy and evaluated patient outcomes in a smaller, secondary arm of the trial.

Secondary and Pre-clinical Research

Secondary research has contributed to the understanding of the drug's properties:

  • Pharmacokinetic Studies: The study protocol stipulated that participants take the investigational drug with food to evaluate absorption kinetics. The research found the peak plasma concentration time was slightly affected by food intake, which is a common finding in pharmacokinetic studies.
  • Autoimmune Disorder Investigation: Other research has explored its use in less common autoimmune disorders, examining various dosage schedules and biological markers. The evidence from these preliminary studies remains limited and is not yet clear whether the investigational drug is associated with a change in symptoms for these specific conditions.

Frequently Asked Questions (FAQ)

Common questions about Stemox (FAQ)

Q: How quickly should I expect to see an effect from Stemox?

A: According to the official product information, patients generally begin to feel an effect and notice improvement in their condition during the first few days of treatment. If symptoms do not improve or worsen after a few days, seeking guidance from a healthcare provider is recommended.

Q: Does Stemox affect sleep or cause drowsiness?

A: Official documents indicate that Central Nervous System (CNS) adverse reactions have been reported with this medication. These reported effects include insomnia (difficulty sleeping), dizziness, anxiety, and states of confusion.

Q: Can I take Stemox if I also take a common pain reliever?

A: Regulatory drug interaction databases do not typically list specific conflicts with common non-prescription pain relievers, such as acetaminophen or ibuprofen. Official guidance emphasizes the importance of reviewing all medicines, including over-the-counter products, supplements, and vitamins, with a healthcare provider.

Q: Does Stemox have a risk of dependency or withdrawal?

A: Based on official patient information leaflets, this drug is classified as an antibiotic and is explicitly stated as not addictive. Therefore, it is not associated with dependency or withdrawal concerns linked to controlled substances.

Q: What happens if I miss a scheduled time to take Stemox?

A: Official guidance is that a missed dose should be taken as soon as it is remembered. However, regulatory information suggests skipping the dose entirely if it is almost time for the next one. Taking a double dose to compensate is generally advised against.

Q: Do I need to avoid alcohol completely while taking Stemox?

A: Regulatory patient information advises caution regarding alcohol consumption during the course of treatment. While there is no reported chemical contraindication, alcohol consumption may worsen common gastrointestinal side effects such as nausea and diarrhea, and is generally advised against due to potential additive effects on the liver.

Q: Is it normal to feel a change in mood when starting Stemox?

A: Official prescribing information reports Central Nervous System side effects that include changes in mood and behavior. Specifically, effects such as agitation and anxiety have been reported.

Q: Are there any foods or drinks that should not be consumed with Stemox?

A: The official instructions focus on the timing of administration rather than prohibiting specific foods. To minimize potential stomach upset and enhance absorption of one of the components, the drug is advised to be taken at the start of a meal or slightly before.

Q: What does the patient leaflet say about Stemox and driving?

A: According to official patient leaflets, the drug does not usually affect the ability to drive or operate machinery. However, caution is advised because reported side effects, such as dizziness or confusion, can occur. Patients should not drive or operate heavy machinery unless they are feeling well.

Q: Is Stemox considered a controlled substance?

A: This medication is classified pharmacologically as an antibiotic, specifically a penicillin combined with a beta-lactamase inhibitor. It is not listed as a controlled substance under federal drug schedules.

Q: Does Stemox interact with medications used for diabetes?

A: Official drug information lists diabetes as a potential disease interaction that requires caution during use. Furthermore, the amoxicillin component may cause a false-positive result for glucose in certain urine tests, which may affect monitoring for diabetic patients.

Q: Is it okay to stop taking Stemox suddenly?

A: Official recommendations state that completing the full course of treatment as prescribed is necessary, even if symptoms begin to improve quickly. Stopping the medication suddenly or too early can prevent the infection from being fully treated and may contribute to the development of antibiotic resistance.

Q: Can Stemox cause headaches or migraines?

A: Official product safety information lists headache as an adverse reaction that has been reported during treatment.

Q: What should a patient do if they notice an unusual reaction to Stemox?

A: Regulatory documents advise seeking immediate medical attention if signs of a severe allergic reaction (such as swelling of the face or throat, or trouble breathing) are experienced. Seeking immediate medical attention is also advised for serious reactions like seizures or signs of severe liver problems, such as jaundice (yellowing of the skin or eyes).

Q: Does taking Stemox affect laboratory test results?

A: Studies and official information indicate that the amoxicillin component of the drug may interact with certain urine tests. This interaction can potentially cause a false-positive result when testing for glucose (sugar) in the urine.

How should Stemox be stored and disposed of?

The official storage and disposal instructions for Stemox (Co-amoxiclav) ensure the stability of the antibiotic and environmental protection.

Storage Requirements

Formulation Required Condition
Oral Tablets/Unmixed Powder Store below 25^circC; protect from light and moisture in the original container.
Reconstituted Suspension Must be refrigerated (2^circC to 8^circC); do not freeze.

The reconstituted suspension has a limited stability period and must be discarded after 10 days. All forms must be kept out of the sight and reach of children.

Disposal

Unused or expired Stemox must not be thrown into household trash or poured down the drain. Dispose of the product according to local regulations, typically by returning it to a pharmacy or designated take-back program.

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

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