Surpas

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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 Surpas

Quick Facts

Property Description
Active ingredient Amoxicillin and Clavulanic acid
Form Tablets, Oral Suspension, Powder for Injection
Pharmacological class beta-Lactam Antibiotic and beta-Lactamase Inhibitor Combination
Common use Combating bacterial infections
Origin Semi-synthetic and Synthetic

What Type of Medicine is Surpas?

Surpas is a prescription-only fixed-dose combination product containing the active ingredients Amoxicillin and Clavulanate Potassium, widely recognized by the generic designation Co-amoxiclav. The medicine is categorized as an Access group antibiotic, specifically belonging to the beta-Lactam antibiotic and beta-Lactamase inhibitor combination class. This classification is clinically recognized for addressing infections where bacterial resistance mechanisms are present. Surpas is manufactured in several standard dosage form(s), including tablets for oral administration and sterile powder for injection for intravenous use, allowing for its application across various patient groups.

Composition and Origin: The Dual-Action Components

The composition of Surpas centers on two essential chemical entities: Amoxicillin, which is a semi-synthetic derivative of the penicillin class, and the synthetic enzyme inhibitor Clavulanic acid. Amoxicillin functions as the primary bactericidal agent, directly killing bacteria. Clavulanic acid is included as a necessary auxiliary component because it is classified as a beta-Lactamase inhibitor, meaning its specific role is to neutralize the bacterial enzymes that would otherwise destroy the Amoxicillin. This combination is essential because it maintains the antibiotic's effectiveness, a design supported by pharmacological studies.

General Purpose: Why is the Amoxicillin/Clavulanate Combination Used?

The general purpose of the Surpas combination is to combat bacterial infections, particularly those caused by strains possessing resistance mechanisms to standard penicillin-class antibiotics. By utilizing Clavulanic acid to shield the Amoxicillin, the medicine successfully restores the full antimicrobial activity against enzyme-producing bacterial populations. The combination is one of the most frequently prescribed antimicrobials due to its broad spectrum of activity against key pathogens. This confirms the drug's established role in addressing infections where antibiotic resistance is a concern. The product is recognized for its clinical importance in basic healthcare systems.

Regulatory References

  1. World Health Organization (WHO) Essential Medicines List
  2. WHO Essential Medicines List entry

What side effects are possible with Surpas?

Possible Side Effects and Safety Information

The official safety profile of Amoxicillin and Clavulanate Potassium (Surpas) is structured by government regulatory documents, detailing adverse reactions by affected physiological system and frequency.

Frequency-Classified Adverse Reactions

Adverse reactions are classified according to incidence observed in clinical data:

  • Very Common: Diarrhoea (in adults).
  • Common: Mucocutaneous candidosis, Nausea, and Vomiting.
  • Uncommon: Dizziness, Headache, Indigestion, Skin rash, Pruritus, Urticaria, and moderate elevations of liver enzymes (AST/ALT).
  • Rare: Reversible leucopenia, Thrombocytopenia, and Erythema multiforme.

System-Organ Classes and Serious Reactions

Side effects are documented across various System-Organ Classes, including Gastrointestinal Disorders and Hepatobiliary Disorders. The most frequently reported events are related to the gastrointestinal tract, and nausea is noted as being more often associated with higher oral doses.

Official labels describe Serious Adverse Reactions, which include life-threatening Severe Cutaneous Adverse Reactions (SCAR) such as Stevens-Johnson syndrome (SJS) and Acute Generalised Exanthemous Pustulosis (AGEP). Severe Hypersensitivity Reactions, including Anaphylaxis and Angioedema, are also documented. Hepatic events, such as Hepatitis and Cholestatic Jaundice, which may be delayed in onset and potentially fatal, are explicitly listed safety concerns. Antibiotic-associated Colitis is also a documented serious gastrointestinal reaction.

Population-Specific Safety Notes

Safety constraints exist for specific populations. Caution is advised for patients with Hepatic Impairment, and the medicine is contraindicated in those with a history of amoxicillin/clavulanate-associated jaundice. The risk of convulsions is noted in patients with Renal Impairment. Use is avoided in individuals with suspected Infectious Mononucleosis due to the associated risk of a morbilliform rash. Additionally, Prolonged Use may occasionally result in the overgrowth of non-susceptible organisms.

Overdose and Emergency Response

Surpas Overdose and When to Seek Help

Overdosage of Surpas (Amoxicillin and Clavulanate Potassium) is formally described in regulatory documents as presenting with specific clinical signs. Primary manifestations are gastrointestinal symptoms, including vomiting, diarrhea, and abdominal discomfort. The official prescribing information also documents neurological effects, such as episodes of convulsions (fits) and drowsiness. Notably, the risk of convulsions is specifically heightened in patients with impaired renal function or those who have received very high doses.

The most critical documented outcome following overdosage is the development of Amoxicillin crystalluria, which can progress to serious renal complications, including oliguric renal failure.


Regulatory Guidance on Emergency Action

Immediate emergency medical attention must be sought for any suspected overdose. Official guidance explicitly mandates calling emergency services (such as 911) if the person collapses, has a seizure, or experiences trouble breathing.

Overdose management is restricted to symptomatic and supportive treatment, as no specific antidote is available. Supportive care requires maintaining adequate fluid intake and urinary output to reduce the risk of crystalluria. Haemodialysis is an established procedure documented to effectively remove both Amoxicillin and Clavulanate from the systemic circulation.

Therapeutic Uses of Surpas

Surpas (Amoxicillin/Clavulanate) is a combination antibiotic used across several medical domains to address infections caused by susceptible bacteria. Its purpose is to provide therapeutic support that may help in addressing the infection and ease the overall burden of acute symptoms. The combination is commonly used in the symptomatic management of certain infections of the ears, lungs, sinus, skin, and urinary tract.

The medication is relevant in clinical settings marked by the sudden onset of pronounced symptoms where short-term symptomatic assistance is needed. Conditions for which it is relevant include acute otitis media, bacterial rhinosinusitis, community-acquired pneumonia, and various forms of skin and soft tissue infections, including those following animal or human bites. It may also be applied in addressing infections of the urinary tract and certain dental abscesses.


Quick Fact: Support for Symptoms of Acute Discomfort

Symptom Domain Key Benefit
Pain and Inflammation May assist with managing symptoms related to inflammatory or irritative states.
Respiratory Distress Contributes to supportive symptom management of persistent cough and chest congestion.
Functional Strain Supports the patient when symptoms create noticeable physiological strain.

Easing Symptoms of Acute Episodes

This medicine is relevant for managing groups of symptoms that may appear suddenly or intensify over time, such as fever, cough, and localized pain. The key benefit is providing support that assists with managing the impact of these distressing manifestations and may assist in supporting comfort. In summary, “it is commonly used to help with symptoms related to inflammatory or irritative states and contributes to easing the overall symptom load.”

Regulatory References

  1. Amoxicillin and Clavulanic Acid: MedlinePlus Drug Information

Eligibility and Restrictions for Use

Official Eligibility and Contraindications

The eligibility for Surpas (Amoxicillin/Clavulanate) is strictly defined by official regulatory documents, focusing primarily on patient history and physiological status.

Absolute Contraindications

Surpas is contraindicated for patients with a documented history of a serious immediate hypersensitivity reaction (such as anaphylaxis) to Surpas, any penicillin, or any other beta-lactam antibiotic. The medicine is also prohibited for individuals with a prior history of cholestatic jaundice or hepatic dysfunction specifically associated with previous Amoxicillin/Clavulanate treatment.

Restricted or Conditional Use

Use should be avoided in patients with suspected or confirmed infectious mononucleosis due to the high risk of rash. Patients with severe renal impairment (Creatinine Clearance < 30 mL/min) are contraindicated from using certain extended-release tablet formulations, and other strengths require dose adjustment. Use in existing hepatic impairment requires caution and monitoring.

Age and Physiological Status

Eligibility is established for adults and children ge 40 kg. Children < 40 kg must use weight-appropriate formulations, as certain high-ratio tablets are not recommended. Use in infants < 3 months is subject to specific criteria. For pregnancy, use should be avoided unless considered essential by a physician, and use during lactation requires an official benefit/risk assessment.

What should I know about interactions with other medicines?

Interaction Map: Interactions with other medicines and products — official regulatory information for Surpas (Amoxicillin/Clavulanate)

Category Official Regulatory Documentation
Medicinal product categories with documented interactions Oral Anticoagulants, Contraceptives (Combined Estrogen/Progesterone), Bacteriostatic Antibiotics
Specific interacting medicines (if explicitly listed) Probenecid, Allopurinol, Methotrexate, Mycophenolate Mofetil
Mechanistic basis of interactions (only if stated in label) Inhibition of renal tubular secretion (Amoxicillin component), Alteration of prothrombin time (Pharmacodynamic effect), Interference with enterohepatic recirculation (Mycophenolate Mofetil)
Timing-based interaction rules (if applicable) Oral administration is recommended at the start of a meal to enhance clavulanate absorption. Extended-release tablets must not be taken with a high-fat meal.
Population-specific interaction notes (if applicable) Specific extended-release formulations are contraindicated in patients with severe renal impairment (CrCl < 30 mL/min) and those on hemodialysis.
Interaction-related restrictions Contraindicated in patients with a history of cholestatic jaundice or hepatic dysfunction associated with previous treatment. Avoid use in patients with Infectious Mononucleosis.

Interaction Classifications (High-Level)

Classification Official Regulatory Documentation
Interaction severity classification (as defined in official documents) Contraindicated (for specific populations/conditions), Clinically Significant (with Oral Anticoagulants, Probenecid)
Regulatory basis (EMA / FDA / etc.) FDA Prescribing Information, European Summary of Product Characteristics (SmPC), NIH
Interaction-context constraints (as defined in official documents) Restrictions based on past hepatic history and current renal function; administration relative to meals is required for optimizing bioavailability.

Resulting Interaction Structure

Official Interaction Statements:

  • Co-administration with Probenecid delays amoxicillin excretion via competitive inhibition of renal tubular secretion, resulting in increased and prolonged blood levels of amoxicillin.
  • Concomitant use with oral anticoagulants may increase the prolongation of prothrombin time (INR).
  • Co-administration with Mycophenolate Mofetil (MMF) is associated with a reduction in systemic exposure to its active metabolite (MPA).
  • The drug may reduce the efficacy of oral contraceptives and increases the incidence of skin rash when combined with Allopurinol.

Connection to the overall interaction profile (2–4 sentences): The official regulatory interaction profile is defined by pharmacokinetic alterations, specifically the inhibition of renal clearance of amoxicillin and the enhancement of clavulanate bioavailability via food administration rules. The profile further documents pharmacodynamic effects that alter coagulation parameters and reduce the systemic exposure of certain co-administered immunosuppressants. These documented interaction patterns define the regulatory constraints and restrictions described across government labeling.

Mechanism of Action

How Surpas Works

The mechanism of action for Surpas (Amoxicillin/Clavulanate) is a combined approach that targets both the bacterial structure and the bacteria's defense system to exert its bactericidal effect. This process falls into two primary mechanistic domains.

beta-Lactam Blockade of Bacterial Cell Wall Synthesis

This core domain addresses how the Amoxicillin component acts on the final stage of bacterial cell wall biosynthesis. It targets Penicillin-Binding Proteins (PBPs)—enzymes essential for cross-linking the cell wall material—and irreversibly inhibits their function. This molecular blockade initiates a cellular cascade where the bacteria cannot maintain structural integrity, leading directly to cell rupture and the bactericidal effect.

Protection Against beta-Lactamase Enzymes

This complementary domain focuses on Clavulanate’s role in inhibiting bacterial beta-Lactamase enzymes. Clavulanate acts as a suicide inhibitor against beta-Lactamase enzymes, which would otherwise chemically destroy the Amoxicillin. By irreversibly inactivating these defense enzymes, Clavulanate ensures that the active Amoxicillin concentration remains high enough to fully execute its mechanism against the cell wall, thereby restoring Amoxicillin's functional integrity and expanding the range of susceptible bacterial targets.

Dosage and Administration Information

How Surpas (Amoxicillin/Clavulanate) is Used

The administration of Surpas follows standardized protocols to ensure the proper delivery of both the Amoxicillin and Clavulanate components. The medicine is utilized via the oral route (tablets, suspension) and the intravenous (IV) route (powder for injection).


Standard Administration and Dosing

Usage Aspect Instruction Principle
Timing with Meals Oral doses should be taken at the start of a meal to enhance the bioavailability of the Clavulanate component and support predictable serum concentrations.
Dosing Frequency Typically administered on a time-fixed schedule of every 8 hours (q8h) or every 12 hours (q12h), depending on the strength used and the specific regimen.
Treatment Duration Treatment courses are standardized to specific lengths, most often ranging from 5 to 14 days, and should not exceed 14 days without reassessment.
Formulation Use Extended-release tablets must be swallowed whole and cannot be crushed or chewed. Different tablet strengths are not interchangeable due to variations in the Amoxicillin-to-Clavulanate ratio.

Population and Procedural Rules

Specific adjustments are established for certain patient groups. Dosing for pediatric patients (under 40 kg) is calculated based on mg per kg of body weight, rather than fixed adult doses. For adults with severe renal impairment (CrCl < 30 mL/min), a reduction in the standard dosing frequency (e.g., to every 12 or 24 hours) is utilized to prevent excessive drug accumulation. If a dose is missed, it is recommended to take it as soon as possible, unless the next dose is imminent; taking a double dose is not permitted.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Surpas

The evidence for Surpas (Amoxicillin/Clavulanate) is primarily drawn from formal Randomized Controlled Trials (RCTs) and systematic reviews, which explore outcomes in conditions where bacterial resistance is anticipated. This overview summarizes what types of studies exist and what they monitored, without offering individual clinical advice.


Evidence Overview for Common Infections

Research on acute otitis media (middle ear infection) and acute bacterial rhinosinusitis (sinus infection) has focused on children and adults. Studies monitored the status of symptom resolution and clinical cure at specific follow-up visits, typically up to a few weeks post-treatment. For bacterial rhinosinusitis, some controlled studies reported similar measurements of symptom resolution in groups receiving the combination product and groups receiving placebo, particularly when a definitive bacterial cause was not confirmed. This suggests that certainty remains low for certain clinically diagnosed cases.


Evidence for Respiratory and Skin Infections

Clinical trials and comparative studies have evaluated the combination product for Community-Acquired Pneumonia (CAP), Acute Exacerbation of Chronic Bronchitis (AECB), and skin and soft tissue infections (SSTI). Researchers monitored clinical success rates and microbiological status, with some trials exploring whether shorter treatment courses could provide findings comparable to longer ones. Data for uncomplicated urinary tract infections (uUTI) mainly apply to adult women with confirmed susceptible pathogens.


Limitations and Uncertainties

Most trials focus on short-term outcomes, meaning that evidence is limited for tracking the durability of the response or the frequency of future infectious episodes over extended periods. Consequently, long-term outcomes are not fully established by the core registration trials. Studies specifically address certain patient groups, including children and older adults. However, evidence quality varies across studies, and data for certain complex patient subgroups, such as those who are immunocompromised, remains limited in primary trial summaries.

Frequently Asked Questions (FAQ)

Common questions about Surpas (FAQ)


Q: Are there any common foods or drinks that interact with Surpas?

Official product information recommends that this medication be taken at the start of a meal. This practice helps minimize stomach upset and ensures the clavulanate component is absorbed properly. If you are taking the extended-release tablets, they should specifically be avoided with a high-fat meal.


Q: How long does it typically take before Surpas starts working?

The active components of Surpas typically reach effective concentrations within a few hours of administration, according to pharmacokinetic data. However, the patient's clinical improvement of symptoms may take a few days to become noticeable.


Q: How quickly does Surpas clear out of the system?

Based on official pharmacokinetic data, the elimination half-life for both the amoxicillin and clavulanate components is approximately one hour in adults with normal renal function. The half-life is the time it takes for the concentration of the medication in the body to be reduced by half.


Q: What are the general rules for stopping Surpas?

Regulatory guidelines state that it is important to complete the full course of treatment as prescribed. This helps ensure the infection is completely treated and supports the minimization of the risk of developing drug-resistant bacteria. Treatment is also limited by the maximum prescribed duration, after which it is typically stopped.


Q: Is Surpas safe to use for older adults?

Clinical studies found no overall differences in safety or effectiveness when comparing older adults to younger adults. However, greater sensitivity in some older individuals cannot be ruled out. Regulatory guidance notes that monitoring of renal function may be necessary in this population, as the kidneys are primarily responsible for eliminating the drug from the body.


Q: Can people who are pregnant use Surpas?

Official regulatory documents assign this drug to Pregnancy Category B. While there are no adequate and well-controlled studies conducted specifically in pregnant women, the regulatory labeling indicates that the drug should be used during pregnancy only if clearly needed.


Q: Can I take Surpas if I have a history of [general condition, e.g., heart problems]?

The medication is contraindicated (must not be used) in patients with a history of liver dysfunction (including cholestatic jaundice) associated with previous use of this drug. Regulatory information specifies that caution and dose adjustments may be required in patients with existing kidney disease or hepatic impairment, and its use should be avoided in patients with infectious mononucleosis.


Q: What happens if Surpas is taken by someone who shouldn't use it?

The contraindications are regulatory restrictions intended to prevent severe adverse reactions. For instance, using the drug in patients with a history of liver dysfunction associated with previous use is restricted due to the potential risk of recurring hepatic dysfunction. The warnings are established based on documented risks.


Q: Does Surpas require special monitoring like blood tests?

Yes, in certain circumstances. Liver function monitoring at regular intervals is recommended during treatment in patients with hepatic impairment (liver issues). Monitoring of renal function is also important, particularly in elderly patients, because the drug is primarily eliminated by the kidneys.


Q: Does Surpas interact with common vitamins?

The chewable tablets and some forms of the oral suspension contain the ingredient phenylalanine (derived from aspartame). This ingredient necessitates special caution and dietary restriction for patients with the metabolic condition phenylketonuria (PKU).


Q: What over-the-counter medications should I avoid while using Surpas?

Official regulatory documents note clinically significant interactions with certain co-administered medicines such as Probenecid and Allopurinol. Probenecid can lead to increased blood levels of amoxicillin, while Allopurinol is associated with an increased risk of developing a rash when used with Surpas.


Q: What are the signs of an allergic reaction to Surpas?

Severe allergic reactions (anaphylaxis) can manifest as hives, swelling of the face, lips, tongue, or throat, and difficulty breathing. Serious skin reactions (such as SJS or TEN) may involve painful red or purple skin that looks burned and peels off. The development of these signs necessitates prompt consultation with a healthcare professional.


Q: What if Surpas doesn't work for me?

Official guidance states that this drug should only be used when an infection is proven or strongly suspected to be caused by bacteria that are susceptible to the medication. If symptoms do not begin to improve, consultation with a healthcare provider is recommended for follow-up and evaluation.


Q: Is Surpas considered a new or established treatment option?

The original formulation of this drug received FDA approval in 1984, making it an established and long-standing treatment option.


Q: Does Surpas have a black box warning?

No, this medication does not carry a Boxed Warning (often referred to as a Black Box Warning) in its FDA labeling.


Q: What kind of side effects are common when taking Surpas?

According to regulatory data from clinical trials, the most common side effects reported are gastrointestinal issues, specifically diarrhea, nausea, and vomiting, as well as skin rash.


Q: Is Surpas known to cause stomach upset?

Yes, gastrointestinal side effects are common with this medication. They are among the most frequently reported adverse reactions and can include nausea, vomiting, and general stomach upset. Taking the medicine with food can often help reduce this discomfort.


Q: Do the side effects of Surpas usually go away after a while?

If the side effects are common and mild, such as stomach upset, official patient information indicates they may go away on their own within a few days or a couple of weeks as the body adjusts to the medication. If side effects persist, consultation with a healthcare professional is advised.


Q: Is it normal to feel [vague sensation, e.g., tired/a little sick] when first starting Surpas?

Common side effects reported when starting the medication include nausea and vomiting. While the drug is not widely associated with fatigue, it is normal to feel generally tired or weak while the body is fighting the underlying infection.


Q: Is Surpas a controlled substance?

No, based on regulatory classification, this medication is not classified as a controlled substance by the Drug Enforcement Administration (DEA).


Q: Why do some people stop using Surpas?

The medication is discontinued when a patient develops serious adverse reactions, such as a severe allergic reaction or hepatic dysfunction, which necessitate immediate cessation of treatment. Treatment is also limited by the maximum prescribed duration, after which it is typically stopped.


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

The official label does not list a direct chemical interaction with alcohol. However, alcohol consumption may potentially worsen the common gastrointestinal side effects of the medication, specifically nausea and stomach upset.


Q: Does Surpas affect sleep or cause insomnia?

The medication has been associated with less common effects on the central nervous system (CNS). These CNS effects reported include agitation, anxiety, and insomnia (difficulty sleeping).


Q: Can taking Surpas cause headaches?

Yes, headache has been reported as a less common side effect associated with the use of this medication in clinical experience data.


Q: How should Surpas be stored?

Official labeling specifies that tablets should generally be stored at room temperature. The reconstituted liquid suspension requires refrigeration and must be discarded after 10 days to maintain potency.


Q: Can Surpas affect mood or energy levels?

Less common side effects reported involve the central nervous system and can include changes in mood such as anxiety, confusion, and agitation. Fatigue is generally not associated with the drug itself but is common when the body is fighting an infection.


Q: Is there an official patient leaflet or guide for Surpas?

Yes, the official prescribing information includes a dedicated section for Patient Counseling Information. This regulatory section provides essential safety and administration instructions designed for patients.


Q: Can I get Surpas without a prescription?

No, this drug is legally classified as a human prescription drug by the FDA and cannot be obtained without a valid prescription from a licensed healthcare provider.


Q: Does Surpas affect fertility?

Nonclinical studies conducted in rats using high doses showed no evidence of impaired fertility. However, the regulatory label notes that there are no adequate and well-controlled studies conducted to assess the effects on human fertility.


Q: Is Surpas approved in other countries besides the US?

Yes. The medication has received regulatory review and approval internationally, as it is regulated by authorities such as the U.S. FDA, the European Medicines Agency (EMA), and the New Zealand Medsafe authority.

How should Surpas be stored and disposed of?

How to Store and Dispose of Surpas (Amoxicillin/Clavulanate)

The medicine requires different storage conditions based on its form. Surpas tablets and dry powder must be stored at controlled room temperature, typically 20 C to 25 C, and must be protected from moisture and kept out of the reach of children. The product must not be frozen.

Once reconstituted, the oral suspension requires storage in a refrigerator (2 C to 8 C) and must be discarded after 10 days.

All forms must be kept in the original, tightly closed container.

For disposal, unused or expired Surpas should not be flushed down a toilet or sink. It should be disposed of through a drug take-back program or mixed with an unappealing substance and sealed in a plastic bag before placing it in the trash, as instructed by regulatory guidelines.

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

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