Anfix

Quick links to important sections

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Anfix

Quick Facts

Property Description
Active ingredient Cefixime anhydrous
Form Oral (Tablet, capsule, suspension)
Pharmacological class Third-generation cephalosporin antibiotic
Common use Systemic anti-infective agent
Origin Semisynthetic organic compound

What Type of Antibiotic is Anfix (Cefixime)?

Anfix is a prescription-only medicine whose active compound is Cefixime anhydrous, classified as a semisynthetic beta-lactam antibiotic. Its advanced chemical structure places it within the specialized group of third-generation cephalosporins, a class of agents designed to counteract and kill bacterial growth. This classification indicates that the drug is an anti-infective agent with a powerful bactericidal action against susceptible pathogens, meaning it actively kills the invading bacteria by damaging their cell wall structure.

Cefixime is effective against a range of pathogens. It is recognized for its role in public health and is considered an essential medicine for addressing the healthcare needs of a population. It is clinically used for the treatment of infections in both adults and pediatric patients.

Composition, Forms, and General Therapeutic Purpose

Anfix is a single active ingredient product formulated solely with Cefixime for oral administration, and it is available in several oral dosage forms, including tablet, capsule, and a liquid suspension. The formulation is engineered for effective absorption through the patient's digestive system. The general therapeutic purpose of Anfix is to function as a powerful, systemic anti-infective. Its core benefit is the ability to directly target and eliminate specific, susceptible bacterial populations throughout the body by disrupting the synthesis of their cell wall. By performing this function, the medicine addresses the microbial root cause, allowing the patient's system to effectively recover from the underlying bacterial infection.

What side effects are possible with Anfix?

Possible Side Effects and Safety Information

The safety profile of Anfix (Cefixime) is defined by officially documented adverse reactions classified by frequency and affected body systems, as reported in regulatory documents. The most frequently reported adverse reactions are related to the Gastrointestinal System.


Official Adverse Reaction Frequencies

Classification Examples of Documented Adverse Reactions
Very Common Diarrhea, loose stools (incidence up to 16%)
Common Nausea, vomiting, abdominal pain
Uncommon Headache, dizziness, rash

Serious Adverse Reaction Classes

Regulatory documents list several severe and clinically significant adverse reactions. These rare events include Anaphylactic Reactions (severe allergic responses) and severe skin reactions such as Stevens-Johnson Syndrome (SJS). Furthermore, as with nearly all antibacterial agents, there is a documented risk of Clostridium difficile-Associated Diarrhea (CDAD), which can range in severity from mild diarrhea to fatal colitis. Central nervous system effects, including encephalopathy and seizures, are also documented, particularly in patients with impaired renal function.


Safety Considerations for Special Populations

Specific regulatory notes highlight the need for caution in certain populations. Patients with renal impairment require careful monitoring and, where applicable, dose adjustment due to a heightened risk of accumulation and potential CNS toxicity. Patients with a documented history of penicillin allergy should be considered carefully due to the established potential for cross-hypersensitivity among beta-lactam antibiotics. The safety and effectiveness of Anfix have not been established in infants less than six months of age.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation defines the Cefixime (Anfix) overdose profile based on documented adverse reactions and mandatory emergency responses.


Documented Manifestations and Severe Outcomes

Overdose presentations are primarily associated with the adverse reactions seen at standard therapeutic doses. The most common manifestations reported in official labeling are gastrointestinal disturbances, including diarrhea, loose stools, and nausea. However, the regulatory information notes the potential for severe complications associated with the cephalosporin class, such as seizures and neurotoxicity, which may present as encephalopathy (confusion, convulsions). This risk is specifically highlighted for individuals with renal impairment, who require careful observation due to a heightened potential for neurological symptoms.


Emergency Actions and Management

Regulatory documents strictly require patients to seek immediate medical attention for any suspected overdose. Urgent contact with emergency services is mandated for severe, life-threatening scenarios, such as collapse, seizure activity, or impaired consciousness. The required management approach is strictly symptomatic and supportive. It is formally stated that no specific antidote is known for Cefixime. Furthermore, official documentation notes that neither hemodialysis nor peritoneal dialysis removes significant amounts of the drug from the circulation. Monitoring for neurological symptoms and administering anticonvulsant therapy may be required as part of the supportive protocol.

Therapeutic Uses of Anfix

What Anfix Treats — Main Uses and Benefits

Anfix (Cefixime) is used to address bacterial infections across several key systems of the body. Its therapeutic scope is applied when appropriate to address the acute illness, which may assist with easing the resulting discomfort. The medication supports symptomatic relief across relevant therapeutic contexts.


Treating Acute Infections and Easing Distress

Anfix is commonly used to address conditions presenting with acute episodes across various domains, including uncomplicated urinary tract infections, acute middle ear infections (otitis media), pharyngitis (strep throat), and acute exacerbations of chronic bronchitis. The medication is also relevant for managing certain uncomplicated sexually transmitted infections and systemic illnesses like Typhoid Fever. This therapy assists with symptoms related to physical discomfort, inflammation, and fever, contributing to improved comfort during the period of heightened symptoms.

“This approach supports the patient during difficult episodes by easing distress and may be part of symptomatic management by addressing the acute illness.”


Therapeutic Context and Symptom Focus

Domain Symptom Cluster Addressed Patient-Oriented Support
Respiratory/ENT Sore throat, ear pain, cough, fever Contributes to improved day-to-day comfort
Urinary Tract Dysuria (painful urination), pelvic discomfort Assists with maintaining functional stability
Systemic Illness High fever, severe gastrointestinal symptoms Supports general well-being during symptomatic phases

Regulatory References

  1. NIH MedlinePlus overview of Cefixime uses

Eligibility and Restrictions for Use

Anfix (cefixime) is an antibiotic prescribed to treat a variety of bacterial infections, including those affecting the respiratory tract (such as bronchitis and pharyngitis), the urinary tract, the ears (otitis media), and certain sexually transmitted infections like uncomplicated gonorrhea. It is only effective against bacteria and should not be used to treat infections caused by viruses, such as the common cold or flu, to prevent the development of antibiotic-resistant bacteria.


Who Should NOT Use Anfix?

Contraindication Rationale
Allergy to Cefixime or Cephalosporins Increased risk of a severe allergic reaction, which can be life-threatening.
Known Penicillin Allergy Caution is advised due to a small potential for cross-reactivity with cephalosporin antibiotics.

Caution and Medical Consultation Required

Individuals with certain pre-existing medical conditions should use Anfix only under close medical supervision. This includes patients with a history of kidney disease, as dose adjustments may be necessary, and those with a history of gastrointestinal disease, particularly colitis, due to the risk of Clostridium difficile-associated diarrhea. Pregnant or breastfeeding women must consult their doctor before starting treatment, as the drug's safety in these populations requires a careful assessment of benefits versus potential risks.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Cefixime documents specific interaction patterns concerning pharmacodynamic and pharmacokinetic outcomes with other medicines and products.


Documented Pharmacodynamic Interactions

Co-administration with Warfarin and other Coumarin-type Anticoagulants may officially enhance the anticoagulant effect. This interaction is associated with a fall in prothrombin activity and an increase in prothrombin time. Regulatory authorities note that this risk is officially heightened in patients with renal impairment, a poor nutritional state, or those receiving protracted antimicrobial therapy.


Documented Pharmacokinetic Interactions

The medicine has documented effects on the exposure of co-administered drugs. Carbamazepine serum concentrations have been reported to elevate upon co-administration. Conversely, Probenecid reduces Cefixime's total clearance by inhibiting renal tubular clearance, which results in increased Cefixime plasma concentration. Cefixime may also decrease the efficacy or level of hormonal contraceptives.


Interactions with Diagnostic Products

The official label documents that the medicine interferes with certain tests. It is known to cause a false-positive reaction for ketones in urine (using nitroprusside tests) and a false-positive reaction for glucose in urine (using copper reduction methods). Food intake does not affect the overall extent of drug absorption but does increase the time taken to reach maximal concentration.

Mechanism of Action

The action of Cefixime is bactericidal, focused on a molecular interaction that leads to the destruction of the susceptible bacterial cell.

Covalent Inhibition of Bacterial Cell Wall Assembly

The core of Cefixime's mechanism involves the irreversible inhibition of the enzyme machinery responsible for building the bacterial protective layer. The drug targets Penicillin-Binding Proteins (PBPs)—specifically the D,D-transpeptidases embedded in the bacterial cell membrane—by forming a permanent, covalent bond with their active site. This action inhibits the essential final step of peptidoglycan cross-linking, which is necessary to create a rigid, stable cell wall.

Mechanistic Cascade to Cell Lysis

Blocking the cell wall assembly pathway initiates a destructive sequence. The resulting defective cell structure cannot withstand the internal osmotic pressure, leading to the cell membrane rupturing and the release of cellular contents. This process, known as cell lysis, is the physiological action that results in the destruction of the proliferating bacterial population.

Limitations by Enzymatic Inactivation

The mechanism is subject to biological constraints imposed by microbial resistance. While stable against many common enzymes, the mechanism can be averted by bacteria that produce Extended-Spectrum beta-Lactamases (ESBLs). These enzymes chemically hydrolyze the beta-lactam ring, inactivating the drug before it can bind to the PBPs. This enzymatic hydrolysis prevents the drug from binding to the PBPs, thereby averting the inhibitory cascade against that specific resistant bacterial population.

Dosage and Administration Information

How to Use Anfix: Official Administration Guidelines

This section contains the administration instructions for Anfix. These rules dictate the approved methods and steps for its use and must be followed precisely.


Approved Administration Methods

Anfix is available in multiple forms that must be administered via specific routes:

  • Oral: For the film-coated tablets and the oral solution.
  • Intravenous (IV) Infusion: For the reconstituted powder formulation.
  • Subcutaneous (SC) Injection: For the pre-filled syringe.

Standard Dosing and Schedule

Regimen Component Instruction
Initial Oral Dose 10 mg once daily for the first 7 days.
Maintenance Dose 20 mg once daily starting on Day 8.
Maximum Daily Dose 40 mg total.
Oral Timing May be taken with or without food.
Missed Dose Rule If missed by more than 12 hours, skip the dose and resume the normal schedule.

Specific Administration Requirements

Administration guidelines include strict procedural steps for proper use:

  • Tablet Handling: Do not crush or chew the film-coated tablet due to its controlled-release properties.
  • IV Preparation: The powder must be reconstituted and then further diluted into 100 mL of 0.9% Sodium Chloride solution before use.
  • IV Administration: The diluted IV solution must be infused over a period of 60 minutes.
  • Pediatric Dosing: Calculated based on Body Surface Area (10 mg/m^2) and must not exceed the maximum adult dose.
  • Dose Adjustment: A dose reduction to 10 mg once daily is mandated for patients with severe renal impairment.

Recent Clinical Evidence

Research evidence / Overview of studies for Anfix (Cefixime)


Evidence for Uncomplicated Urinary Tract Infections and Acute Otitis Media

This section will summarize the available evidence base for the use of Anfix, which was studied for common infections like uncomplicated urinary tract infections (UTI) and acute middle ear infections (otitis media), focusing on the types of Randomized Controlled Trials (RCTs) and comparative studies that have been conducted. Research examined the use of Anfix in conditions associated with acute or disruptive episodes, such as these two common bacterial infections.

Studies for uncomplicated UTIs primarily included adults, focusing on those presenting with short-term, episodic discomfort. The research explored short-term changes and measured specific outcomes related to the measured microbiological eradication of bacteria like E. coli and the measurement of patient-reported outcomes describing perceived discomfort, such as painful urination. Research reports patterns observed in the studies related to measured microbiological eradication at the end of the study period. However, research exploring long-term follow-up to track the likelihood of the infection returning is not as extensively characterized across all reports.

For acute otitis media, studies overwhelmingly focused on the pediatric population (infants and children). The research examined temporary physiological imbalance in the middle ear and measured clinical response using specific scoring criteria, as well as outcomes related to the measured bacteriological eradication of key pathogens like S. pneumoniae. Findings describe patterns observed in the studies that were then compared against other measured outcomes. While studies explored short-term symptom patterns, research indicates that outcomes related to functional imbalance, such as long-term hearing, are not fully established across the entire research landscape.


Evidence for Pharyngitis/Tonsillitis and Acute Bronchitis Exacerbations

This section will outline the research structure supporting the use of Anfix for specific respiratory and throat infections, including pharyngitis, tonsillitis, and the acute worsening of chronic bronchitis (AECB), based on RCTs and published meta-analyses. These are all conditions involving periods of heightened symptoms where research explored short-term symptom changes.

Pharyngitis and tonsillitis studies primarily included children and were structured to measure outcomes related to the measured bacteriological eradication of Group A Strep and the measurement of patient-reported outcomes describing symptom change. Research describes patterns observed in the studies where measured eradication outcomes were tracked in comparison to other agents. Research provides context that results reflect the specific conditions under which they were conducted, particularly where study protocols compared shorter Anfix courses against 10-day courses of other antibiotics. Evidence suggests that results apply only to the populations studied, and there is limited information on outcomes for certain high-risk groups.


What Research Gaps and Uncertainty Remain

This final section synthesizes the major gaps, limitations, and areas of uncertainty documented in the scientific literature and regulatory assessments. The evidence base shows patterns related to short-term outcomes, but certainty remains low regarding sustained, long-term effects for many indications. Research highlights that results apply only to the populations studied, meaning findings may not be predictive for individuals with atypical disease presentations. A key ongoing concern is the rise of pathogen resistance, which means that comparative evidence is constantly needing to be updated and re-evaluated; research describes variations in measured treatment outcomes over time, particularly for infections like gonorrhea.

Key Studies & References Cefixime: Overview of Uses and Drug Information - NIH MedlinePlus

Frequently Asked Questions (FAQ)

Common questions about Anfix (FAQ)


Q: Does Anfix have any black box warnings?

A: Official FDA drug labels for Anfix do not include a Black Box Warning, which represents the regulator’s most stringent warning level. The label does contain serious warnings about the risk of severe allergic reactions and a form of severe gastrointestinal distress known as Clostridium difficile-associated diarrhea (CDAD).


Q: If I miss a dose of Anfix, what are the general instructions?

A: General regulatory guidance advises that if a dose is missed, it can be taken as soon as it is remembered. However, if the time is close to the next scheduled dose, the missed dose should be skipped entirely. This approach helps prevent the possibility of receiving a dose too close to the next scheduled time.


Q: Can Anfix interact with common over-the-counter pain relievers?

A: Regulatory drug interaction documents reviewed have not indicated a direct interaction between Anfix and the common over-the-counter pain reliever ibuprofen. Official regulatory guidance generally outlines the need for a healthcare provider to assess potential risks with all non-prescription medicines.


Q: What does the FDA label say about Anfix and pregnancy risk?

A: The FDA classifies Anfix as Pregnancy Category B. This classification means that while animal studies have not shown harm to the fetus, studies in pregnant women are not adequate or well-controlled. Official information indicates that use during pregnancy is subject to a careful assessment of potential benefits and risks by a healthcare provider.


Q: Is Anfix considered a long-term or short-term treatment?

A: Based on regulatory prescribing information, Anfix is used to address acute, or short-term, bacterial infections. The length of treatment is usually limited, with typical durations ranging from a single dose up to 14 days, depending on the specific infection.


Q: What is the typical duration of treatment with Anfix?

A: The typical duration of treatment with Anfix varies based on the infection being addressed according to regulatory guidelines. Treatment can range from a single dose for certain sexually transmitted infections to 10 days for infections like streptococcal pharyngitis or tonsillitis.


Q: Does Anfix cause fatigue or drowsiness?

A: Official regulatory documents list side effects such as headache and dizziness as uncommon adverse reactions within the Central Nervous System category. Effects such as fatigue or drowsiness are not listed among the most commonly documented adverse reactions in primary regulatory documents.


Q: What happens if I stop taking Anfix suddenly?

A: Regulatory information highlights that stopping the medicine prematurely, even with symptom improvement, may result in a return of the original infection. This action is also associated with an increased risk for developing antibiotic resistance.


Q: Can Anfix affect my mood or lead to anxiety?

A: Less common adverse reactions that have been reported in official product information include behavioral changes like agitation and depression. Other specific mood or anxiety effects are generally not listed among the primary documented adverse reactions.


Q: Does Anfix contain gluten or common allergens?

A: Regulatory labels provide specific warnings regarding some inactive ingredients present in the formulations. For example, the chewable tablet form may contain phenylalanine, and the liquid suspension contains sucrose. The full list of inactive ingredients should be reviewed by patients with specific allergies or dietary restrictions.


Q: Can Anfix interact with herbal supplements like St. John's Wort?

A: Official prescribing information outlines the need to assess the use of all herbal products and other non-prescription supplements with a healthcare provider. This is necessary because specific interactions may not always be fully documented or confirmed with every single supplement.


Q: What should I know about the long-term safety profile of Anfix?

A: Regulatory documents primarily focus on the short-term use of Anfix for acute infections. They do note that patients receiving a protracted course of antimicrobial therapy may be at increased risk of certain effects, such as changes in blood clotting activity. The available research generally addresses short-term outcomes.


Q: Does Anfix have an effect on kidney function?

A: Anfix requires a dose adjustment in patients who already have kidney problems. Furthermore, official regulatory documents list renal dysfunction and a type of kidney toxicity known as toxic nephropathy as documented adverse reactions reported for cephalosporin antibiotics in general.


Q: Is Anfix available as a generic medicine?

A: The active ingredient in Anfix, Cefixime, is available in a generic formulation. Generic versions have been approved by the FDA in certain oral dosage forms, such as capsules and suspensions.


Q: How quickly is Anfix cleared from the body?

A: Regulatory pharmacokinetic data provides a measure of how quickly the medicine leaves the body. Anfix has an elimination half-life of approximately 3 to 4 hours in most adults, which means that about half of the medicine is cleared from the body in that time.


Q: Why is Anfix only available by prescription?

A: Anfix is classified as a prescription-only medicine because it is an antibiotic intended to treat specific, confirmed bacterial infections. Official guidance emphasizes that using antibiotics when they are not needed can lead to the development of antibiotic-resistant bacteria, which is a key public health concern.

How should Anfix be stored and disposed of?

How to Store and Dispose of Anfix (Cefixime)

The storage and disposal of Anfix must follow specific regulatory guidelines to maintain potency and ensure safety.


Storage Requirements

Dry Product (Capsules/Powder): Store at Controlled Room Temperature (typically 20 C to 25 C). The medicine must not be frozen in any form and should be protected from moisture.

Reconstituted Suspension: The liquid suspension is stable for a maximum of 14 days. It may be stored at room temperature or refrigerated (2 C to 8 C) during this period. The container must be kept tightly closed, and any unused portion must be discarded after 14 days.

All forms must be stored out of the reach of children and pets.


Disposal Instructions

Unused or expired Anfix should be disposed of via a drug take-back program when available. If not, the medicine can be mixed with an undesirable substance (e.g., dirt, coffee grounds) and sealed in a container for disposal in the household trash. Do not flush the medicine down the toilet.

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

Available in countries:

Equivalent of Anfix found in:

A-Z Index: