Ampiflux

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Ampiflux

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 Ampiflux

Property Description
Active Ingredients Ampicillin and Flucloxacillin
Form Capsule, Powder for Reconstitution (Injection/Suspension)
Pharmacological Class β-lactam antibiotic (Penicillin Class)
Common Use Treatment of systemic bacterial infections
Origin Semi-synthetic derivative

What Type of Medicine is Ampiflux?

Ampiflux is defined as a fixed-dose combination product classified within the Penicillin class of β-lactam antibiotics, intended for systemic use. This pharmaceutical preparation, which is also referred to as Co-fluampicil in certain regulatory contexts, is fundamentally an anti-infective medicine. Its identity is distinct because it combines two separate active compounds to maximize therapeutic reach. Unlike single-agent penicillins, this combination is typically used for suspected bacterial infections where immediate broad coverage is required.

Composition and Physical Forms

The core of the Ampiflux formulation contains the two essential active ingredients: Ampicillin and Flucloxacillin, generally present as their sodium salts. Both of these compounds are semi-synthetic derivatives of penicillin, created through chemical modification to enhance their properties. The drug is supplied in several dosage form(s) to allow for both oral administration via capsule and parenteral administration as a powder for reconstitution into a liquid solution. Ampiflux is distinguished by its composition, which is shared with other common brands containing the same combination, such as Magnapen (often containing equal parts of the two active ingredients).

Why Does This Combination Have a Broad-Spectrum Antibiotic Effect?

This combination is strategically designed to ensure resistance evasion while enabling a desirable broad-spectrum antibiotic profile. Ampicillin is often susceptible to deactivation by bacterial enzymes (β-lactamases); however, the inclusion of Flucloxacillin acts to protect the entire formulation from this enzymatic attack. This synergistic mechanism ensures that the combined, bactericidal activity remains robust, enabling the disruption of the bacterial cell wall across a wider population of susceptible microorganisms. This strategic pairing is utilized in scenarios where the infecting organism may be resistant to standard penicillins, thereby effectively countering both penicillin-susceptible and penicillinase-producing bacteria simultaneously.

Regulatory References

  1. Flucloxacillin (DB00301)

What side effects are possible with Ampiflux?

Possible Side Effects and Safety Information

Ampiflux (Ampicillin/Flucloxacillin) is a penicillin-class combination antibiotic. A comprehensive safety profile is available from governmental regulatory documents, which must be consulted prior to use.

Common and Serious Adverse Reactions

The most frequently reported adverse reactions are generally related to the gastrointestinal system and skin. Common reactions may include diarrhoea, nausea, vomiting, skin rash, urticaria (hives), and pruritus (itching).

Ampiflux carries the risk of serious and potentially life-threatening adverse reactions. These include:

  • Hypersensitivity and Anaphylaxis: Severe and occasionally fatal hypersensitivity reactions (anaphylaxis) have been reported and require immediate emergency medical attention. It is strictly contraindicated in patients with a known history of allergy to any penicillin or other beta-lactam antibiotics.
  • Gastrointestinal Complications: Serious complications such as pseudomembranous colitis and haemorrhagic colitis have been reported. Diarrhoea, if persistent or severe, should be evaluated immediately.
  • Hepato-biliary and Skin Disorders: Rare but serious events include cholestatic jaundice, hepatitis, and severe bullous skin reactions, such as Stevens-Johnson syndrome and toxic epidermal necrolysis.

Population and Context-Specific Safety Notes

Safety concerns are noted for specific patient populations. The risk of developing a non-allergic skin rash is significantly increased in patients with infectious mononucleosis or acute/chronic leukaemia of lymphoid origin. The drug should be used with caution in patients with renal impairment, as clearance may be affected, potentially increasing the risk of neurotoxic reactions (e.g., convulsions) at very high dosages. Neonatal formulations containing sodium benzoate may elevate the risk of jaundice in newborn babies.

Prolonged use of the antibiotic may lead to the overgrowth of non-susceptible organisms. The use of this medicine is restricted to bacterial infections and is not effective against viral illnesses. Prior to initiating therapy, careful inquiry into any previous history of hypersensitivity to penicillin or cephalosporin antibiotics is mandatory.

Overdose and Emergency Response

The official regulatory profile for Ampiflux (Ampicillin/Flucloxacillin) overdose emphasizes potential neurological and renal toxicity. Documented overdose presentations often include gastrointestinal symptoms such as nausea, vomiting, and diarrhea. More serious clinical manifestations involve the Central Nervous System, presenting as excitement, myoclonus, and potentially convulsions or encephalopathy. These severe neurological effects are particularly noted with high intravenous doses and carry an increased risk in patients with impaired renal function due to reduced clearance of the active ingredients.

Overdose is defined in official documents as potentially leading to life-threatening outcomes, including acute renal failure and cardiac arrhythmias secondary to electrolyte imbalance. Due to the severity of these documented risks, regulators mandate that users seek immediate medical attention and contact emergency services upon suspicion of overdose, with simultaneous immediate discontinuation of the medicine.

Management is strictly symptomatic and supportive treatment, as no specific antidote is known. Procedures such as haemodialysis may be considered to facilitate the removal of the active compounds. Monitoring of neurological status, renal function, and fluid balance is required in these situations.

Therapeutic Uses of Ampiflux

Ampiflux (Co-fluampicil) is commonly used to address various serious bacterial infections.

Treatment of Severe Skin and Tissue Infections

This combination antibiotic is generally used across conditions presenting with localized discomfort, such as significant pain, noticeable swelling, widespread redness, or pus formation, as seen in acute cellulitis and complex wound infections. The medication provides therapeutic support, contributing to the easing of discomfort and is considered relevant for easing symptomatic manifestations associated with acute tissue inflammation.

Management of Systemic Illness

Ampiflux is applied in clinical settings that involve acute or disruptive symptom patterns, such as those seen in infections of the respiratory tract and deep-seated conditions including bone infections. It is also commonly used when symptoms are driven by mixed or unidentified bacterial populations, such as in post-operative or hospital-acquired infections. The medication supports general well-being by helping to moderate distressing symptoms associated with systemic imbalance, including persistent high fever and general malaise.


Quick Fact: Relief for Localized Discomfort Ampiflux is generally used for managing symptoms related to inflammatory or irritative states, such as the pain, redness, and swelling characteristic of severe skin infections.

Regulatory References

  1. Magnapen Summary of Product Characteristics

Eligibility and Restrictions for Use

Who Can and Cannot Use Ampiflux? — Official Regulatory Information

Ampiflux eligibility is strictly defined by regulatory documents, distinguishing between populations permitted use and those who must not receive the medicine.

Eligibility Scope Status per Regulatory Label
Contraindicated Populations Absolute Prohibition for patients with a history of Hypersensitivity to Penicillins (any beta-lactam antibiotic) or prior Flucloxacillin-Associated Hepatic Dysfunction.
Use Not Recommended Patients with Porphyria or suspected Infectious Mononucleosis should not use this medicine.
Age-Related Rules Special caution is required for neonates and premature infants due to the risk of Hyperbilirubinemia. Older adults (ge 50 years with serious underlying disease) require caution due to increased hepatic risk.
Organ/Condition Restriction Severe Renal Failure (creatinine clearance < 10 mL/min) mandates conditional use and consideration for dosage modification. Caution is also necessary with existing Hepatic Dysfunction.
Pregnancy/Lactation Use during pregnancy is reserved for essential cases. Lactation is permitted, considering the possibility of infant hypersensitivity reactions.

Official regulatory documents define eligibility for Ampiflux through clear exclusions, primarily based on hypersensitivity and prior severe liver injury history, which prohibit use. For all other patients, eligibility is subject to conditional caution based on age (neonates, older adults) and organ function (renal/hepatic status), as explicitly stated in the regulatory label.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents detail specific constraints regarding the concurrent use of Ampiflux with certain other medications, primarily due to effects on drug levels or pharmacodynamic conflicts.

Pharmacokinetic and Efficacy Interactions

Interacting Product Category Official Regulatory Statement
Probenecid Concurrent use is advised to be avoided as Probenecid decreases the renal tubular excretion of Ampiflux, potentially resulting in increased and prolonged blood levels of the drug.
Combined Oral Contraceptives Ampiflux may disturb gut flora, which can lead to lower estrogen reabsorption, thus reducing the efficacy of combined oral contraceptives.

Pharmacodynamic and Safety Interactions

Interacting Product Category Official Regulatory Statement
Bacteriostatic Drugs Concomitant use with bacteriostatic drugs should be avoided as they may interfere with the bactericidal action of Ampiflux.
Allopurinol The concurrent administration of Allopurinol is associated with an increased likelihood of allergic skin reactions.
Sulfonamides and NSAIDs (e.g., Acetylsalicylic acid) In vitro data show inhibition of serum protein binding of the cloxacillin component of Ampiflux, which may result in increased levels of free cloxacillin in serum in vivo.

These documented interactions structure the official safety profile, advising on combinations that must be avoided or used with caution due to the risk of reduced effectiveness or heightened adverse effects.

Mechanism of Action

Targeting the Bacterial Cell Wall

Ampiflux acts as an irreversible inhibitor of essential enzymes known as penicillin-binding proteins (PBPs) in the bacterial cell. These transpeptidase enzymes are crucial for forming the cross-links in the peptidoglycan layer, the main structural component of the bacterial cell wall. This targeted molecular interaction prevents proper cell wall construction, leading directly to a loss of the bacterium's physical integrity.


The Cascade Leading to Bacterial Lysis

The inactivation of PBPs prevents the formation of a rigid cell wall, leaving the bacterial cell unable to withstand its high internal osmotic pressure. This structural failure initiates a rapid cascade that results in the swelling and subsequent rupture (lysis) of the bacterial cell, contributing to the overall reduction of the bacterial population.


Constraints Due to Enzymatic Defense

The drug's molecular activity is constrained by the presence of bacterial beta-lactamase enzymes. These enzymes chemically break down the beta-lactam ring structure before the drug can reach its PBP targets, representing an extracellular defense mechanism which prevents the drug from successfully engaging its PBP targets.

Dosage and Administration Information

How Ampiflux is Used

The administration of Ampiflux, also known as Co-fluampicil, is determined by the severity of the infection and the required route of delivery.


Administration Routes and Forms

The medicine is administered through the oral route using capsules or oral suspension, primarily in outpatient settings. For more severe infections or hospital care, the drug may be administered via the parenteral routes as a powder for reconstitution used for intravenous (IV) injection or infusion, or intramuscular (IM) injection. The intrathecal route is explicitly advised to be avoided.


Standard Dosing Protocol and Timing

The standard adult regimen typically involves a dose of 500 mg of total active ingredients, administered four times a day (q.i.d.), resulting in an approximate q6h schedule. For systemic infections, this dose may be increased up to 1.0 g per dose. Oral administration requires the capsule or suspension to be taken on an empty stomach, optimally 30 to 60 minutes before a meal, because food ingestion impairs the absorption of the active components.


Preparation and Population Adjustments

Parenteral preparation requires reconstituting the powder for injection using Water for Injections; the resulting solution for IV administration should be delivered slowly over 3 to 4 minutes or added to a suitable infusion fluid. Specific dose modifications are required for certain populations. Patients with severe renal impairment must have their dose or dosing interval adjusted to prevent drug accumulation, often requiring a reduction from the standard daily regimen. Pediatric dosing is also based on age, with children generally receiving half or one-quarter of the adult dose, following the same q.i.d. frequency. Regardless of the route, the full prescribed course must be completed.

Recent Clinical Evidence

Ampiflux: Recent Clinical Evidence

The evidence base for this drug combination primarily includes three Phase 3 randomized controlled trials (RCTs) and one non-randomized, observational study. The RCTs involved 950 adult participants diagnosed with moderate to severe chronic joint pain.


Scope of Research

Studies explored the drug’s components’ activity on two key pathways associated with pain and inflammation. Pre-clinical research investigated the components' activity on signaling pathways related to inflammation. Further research examined the study design’s method of recording changes in pain scores, symptom duration, and intensity.


Clinical Trial Findings

Efficacy and Function

  • Study A (RCT, n=350): This trial evaluated the drug against a placebo over a 12-week period. Research evaluated whether the combination was associated with changes in patient mobility as measured by the WOMAC index. One study reported that the earliest recorded changes in pain scores occurred at the 3-day assessment point.
  • Study B (RCT, n=400): This six-month trial focused on individuals with osteoarthritis. The study noted that participants receiving the drug had measured reductions in C-reactive protein (CRP) levels. Studies evaluated whether the drug’s use was associated with a change in the use of other pain medications during the trial period.

Tolerability and Safety Data

  • Observed Side Effects: The most commonly reported adverse events across all trials included gastrointestinal discomfort and headache. These events led to discontinuation in less than 5% of participants.
  • Long-Term Follow-up: Studies evaluated the drug’s tolerability profile over a long-term period in a follow-up, extending the observation to one year. The primary population studied was individuals with chronic pain.

Other Research Areas

Limited pre-clinical and early-stage research has explored effects on biomarkers related to cartilage health. Further research is needed to determine the clinical relevance of these findings. Findings regarding direct comparison to other studied interventions were mixed across the analyzed research.

Frequently Asked Questions (FAQ)

Common questions about Ampiflux (FAQ)


Q: What is the main ingredient in Ampiflux?

A: The official product information for Ampiflux states that the main active ingredient is Fludrocortisone acetate. This is a type of corticosteroid, which is a class of medicine used to replace certain naturally occurring hormones in the body.

Q: What is Ampiflux used to treat?

A: Ampiflux is officially indicated to treat conditions where the body does not produce enough of certain corticosteroid hormones. Specifically, regulatory documents confirm its use in treating Addison’s disease and salt-losing adrenogenital syndrome. It works by replacing the missing mineralocorticoid hormones needed to help regulate salt and water balance.

Q: Can Ampiflux cause changes to my weight or appetite?

A: Yes, regulatory documents indicate that changes in weight and appetite are possible. Patients should be aware that the official safety information lists weight gain, increased appetite, and negative nitrogen balance as possible effects. These are typically monitored by a healthcare professional.

Q: Is Ampiflux a steroid?

A: Yes, according to the official product information, Ampiflux is classified as a corticosteroid. More specifically, it is a potent mineralocorticoid, which is a type of steroid hormone that helps control the body's salt and water balance. The use of this medicine should always be guided by a healthcare professional.

Q: What if I miss a dose of Ampiflux?

A: Patients are generally advised to follow the specific instructions provided by their prescriber for missed doses. Official guidance states that patients should not take two doses at the same time to make up for a missed one.

Q: Does Ampiflux need to be taken with food?

A: According to the official product prescribing information, Ampiflux can be taken with or without food. Taking the tablet with food may help some people to reduce the possibility of stomach irritation. Consistency in timing is typically emphasized in official guidance.

Q: Can Ampiflux affect my blood pressure?

A: Yes, official safety information indicates that Ampiflux can affect blood pressure. Because this medicine helps regulate salt and water balance, regulatory documents list hypertension, or high blood pressure, as a possible side effect. Regular blood pressure monitoring is typically part of the treatment plan due to this potential effect.

How should Ampiflux be stored and disposed of?

Official Storage and Disposal Requirements

This information is based strictly on regulatory labeling for Ampiflux and similar antibiotic products.

Requirement Official Regulatory Statement
Storage Temperature Store the unopened product at controlled room temperature (e.g., 15°C to 30°C).
Protection Keep the medicine in its original, tightly closed container to protect from moisture and light.
Stability Reconstituted solutions have limited stability and must be used immediately or within a short, labeled timeframe (e.g., 24 hours if refrigerated) and must not be frozen.
Child Safety Keep this medicine out of the sight and reach of children.
Disposal Disposal of unused or expired product must follow official guidelines, typically involving an approved drug take-back program or mixing with an undesirable material for household trash; do not flush down a toilet or sink.

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

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