Cefixim

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Cefixim

Cefixime Quick Facts

Property Description
Active Ingredient Cefixime (Cefixime trihydrate)
Form Oral dosage forms (Tablet, Capsule, Suspension)
Pharmacological Class Third-Generation Cephalosporin Antibiotic
Common Use Neutralizing active bacterial infections
Origin Semisynthetic beta-lactam compound

What Type of Medicine is Cefixime? (Classification and Origin)

Cefixime is a prescription semisynthetic beta-lactam antibiotic classified as a third-generation cephalosporin. This classification denotes its advanced profile as an antimicrobial, which has been clinically recognized for its enhanced efficacy against various Gram-negative organisms. Cefixime is a chemically synthesized compound, not of natural origin, and is provided as a single-ingredient product, with its entire therapeutic effect stemming from the Cefixime molecule, often present as Cefixime trihydrate. Its structure confers inherent stability against certain bacterial defense mechanisms, distinguishing it from earlier beta-lactam antibiotics.


Cefixime Composition and Available Forms (Structural and Delivery Intents)

Cefixime is an orally-active medication, designed for the oral route of administration (per os). The active ingredient is Cefixime, intended to be highly effective when taken by mouth, which is a key feature for patient accessibility. It is available in several convenient oral dosage forms, including tablets, capsules, and a powder for oral suspension. The oral suspension form is particularly designed for pediatric patients who may have difficulty swallowing solid medication, representing a specific focus on different patient groups. Popular trade names utilizing the Cefixime formulation include Suprax and Cefspan, among others.


What is the General Purpose of Cefixime? (Action and Benefit Intents)

The general function of Cefixime is to act as a powerful bactericidal agent. It actively works to kill susceptible bacteria by interfering with their vital process of cell wall synthesis. This targeted action is necessary to ensure the clearance of the underlying pathogen. Cefixime is typically used for managing active bacterial infections where a robust, broad-spectrum oral agent is required. This antimicrobial action provides the necessary therapeutic function to eradicate the bacterial population and resolve the infection.

Regulatory References

  1. NIH MedlinePlus
  2. National Library of Medicine

What side effects are possible with Cefixim?

Cefixime: Possible Side Effects and Safety Information

The official safety profile of Cefixime, a third-generation cephalosporin, is structured by regulatory documents based on the frequency and type of adverse reactions observed during clinical use and post-marketing surveillance. Adverse events are grouped by the affected System-Organ-Class (SOC), with particular emphasis placed on gastrointestinal and immune system disorders.


Frequency-Classified Adverse Reactions

Adverse reactions are classified according to incidence. Very Common events (ge 1/10) are primarily gastrointestinal disorders, most frequently Diarrhea or loose stools. Common events (1% to 10%) include Nausea, Abdominal pain, Headache, and Flatulence. Uncommon and Rare events cover occurrences such as Vomiting, Skin Rashes, and Vertigo.


Serious Adverse Reactions and Safety Constraints

The most critical safety domain concerns rare but serious adverse reactions explicitly listed in regulatory warnings. These include potentially life-threatening Anaphylactic/Anaphylactoid reactions and severe skin disorders such as Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN). Cefixime is also officially associated with the risk of developing Clostridium difficile-Associated Diarrhea (CDAD), which can present during or following treatment. Additionally, a history of Hypersensitivity to penicillins or other cephalosporins is a primary restriction due to the risk of cross-allergic reaction.


Population-Specific Safety Notes

The regulatory label includes specific safety notes for certain populations. Renal Impairment requires official dose adjustment due to an increased risk of adverse events, including encephalopathy. Safety and efficacy are not established in infants less than six months of age.

Overdose and Emergency Response

The official regulatory documents define the Cefixime overdose profile by documenting the potential for severe, acute neurological events. Overdosage at high levels may result in CNS manifestations such as convulsions (seizures), encephalopathy, and confusion. Gastrointestinal issues are also noted, though at up to 2 g doses, adverse reactions were not significantly different from therapeutic use.


Overdose Manifestations and Required Actions

Domain Official Regulatory Description
Documented Manifestations Severe neurological symptoms, including seizures and encephalopathy, are potential outcomes. Gastrointestinal effects may also occur.
At-Risk Factors The risk of neurotoxicity is particularly associated with compromised renal function or when dosage is not appropriately reduced in patients with renal impairment.
Emergency Help Required Immediate professional medical attention must be sought. Contact emergency services (911) or Poison Help if collapse, seizure, trouble breathing, or inability to awaken occurs.

Overdose Management and Constraints

Constraint Official Regulatory Statement
Antidote Availability No specific antidote exists for Cefixime overdosage.
Supportive Measures Management is based on general supportive measures and symptomatic therapy. Gastric lavage may be indicated.
Monitoring Note The drug is not removed in significant quantities by hemodialysis or peritoneal dialysis. Patients should be monitored for at least 24 hours.

This regulatory information underscores that in the event of overconsumption, emergency medical intervention is mandatory due to the severe potential for neurological harm and the absence of a specific counteracting agent.

Therapeutic Uses of Cefixim

The purpose of Cefixime, as a third-generation cephalosporin antibiotic, is to provide effective therapeutic support by targeting susceptible bacterial pathogens, which may help ease the overall burden of symptoms associated with active infections. This medication is commonly used across several key domains where symptoms relate to inflammatory or irritative states caused by bacteria.

Easing Symptom Clusters and Enhancing Comfort

Cefixime is commonly used to help with conditions presenting with acute episodes, including bacterial infections of the upper and lower respiratory tracts (Otitis Media, Tonsillitis, Bronchitis), the urinary tract (uncomplicated cystitis), and specific enteric infections (Typhoid Fever and Shigellosis).

The medication is applied in addressing symptom clusters that may become intense or disruptive, such as ear pain, sore throat, and dysuria (painful urination). Supports the patient during difficult episodes by easing distress and assists with maintaining functional stability.

Quick Fact: Relief for Acute Discomfort
Cefixime is considered relevant for easing symptoms related to inflammatory or irritative states across the respiratory, aural, and genitourinary domains.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Cefixime eligibility is defined by official regulatory criteria, primarily focusing on patient hypersensitivity status, age, and organ function.

Contraindications and Absolute Non-Eligibility

The medicine is contraindicated for any patient with a documented allergy to Cefixime or to other cephalosporin antibiotics. Use is also prohibited for individuals with a history of a severe hypersensitivity reaction to any beta-lactam antibacterial agent, such as penicillins.

Age-Related Eligibility

Use is generally established for adults and pediatric patients six months of age and older. However, the safety and efficacy of Cefixime have not been established in infants younger than six months. For older adults, treatment is allowed, but regulatory documents advise that renal function should be assessed.

Conditional Use and Restrictions

Conditional use is required for patients with impaired renal function (kidney disease), as this is the primary elimination route for the medicine; dose adjustment is mandatory for those with reduced creatinine clearance. Use during pregnancy is restricted and recommended only if clearly needed. Similarly, consideration should be given to discontinuing nursing temporarily during treatment. Furthermore, the chewable tablet formulation is restricted for use in patients with Phenylketonuria (PKU) due to the presence of phenylalanine.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products: Official Regulatory Information

This section describes the interactions of Cefixime as formally documented in regulatory prescribing information, focusing strictly on altered drug exposure, restricted combinations, and pharmacodynamic effects.

Documented Interaction Patterns

Classification Interacting Agent Official Regulatory Description
Pharmacokinetic Probenecid Reduces Cefixime renal clearance, increasing its plasma concentration and overall exposure (AUC).
Exposure Alteration Carbamazepine Elevated Carbamazepine plasma levels have been reported during co-administration.
Exposure Alteration Nifedipine May increase Cefixime's bioavailability by up to 70%.
Pharmacodynamic Warfarin and Anticoagulants May enhance the effects of coumarin-type anticoagulants, resulting in reported increases in prothrombin time.
Pharmacodynamic Nephrotoxic Products Concomitant use with drugs like aminoglycosides is officially noted to increase the risk of renal function impairment.

Regulatory Restrictions and Conditions

Contraindicated Combinations are established with Live Bacterial Vaccines (e.g., Cholera Vaccine) due to documented pharmacodynamic antagonism. Products that inhibit intestinal peristalsis are also contraindicated if Cefixime-associated colitis develops. Regarding Food, its presence does not alter the overall amount of Cefixime absorbed, but it is documented to increase the time required to reach maximal absorption (Tmax). Population-Specific caution notes an increased risk of prolonged prothrombin time when taking anticoagulants in patients with documented renal or hepatic impairment.

Mechanism of Action

How Cefixime Works: Mechanism of Action

Cefixime's function is defined by its ability to interfere with the fundamental processes that construct the bacterial cell. This action is bactericidal, meaning it actively kills the targeted organisms by inducing structural collapse.


Targeted Inhibition of Bacterial Cell Wall Synthesis

Cefixime acts as a covalent inhibitor of Penicillin-Binding Proteins (PBPs), key enzymes responsible for the final cross-linking of the bacterial cell wall's peptidoglycan framework. By permanently deactivating these PBP enzymes, the drug arrests the structural assembly process, a molecular step essential for bacterial survival.


Cascade of Cellular Destruction (Osmotic Lysis)

The lack of a properly assembled, rigid cell wall makes the bacterium unable to withstand the high internal fluid pressure generated by the cell’s contents. This structural failure leads to the rapid rupture, or lysis, of the bacterial cell and subsequent death of the organism. This mechanistic process results in the destruction of the susceptible bacterial population.


Limitations Due to Enzymatic Deactivation

The effectiveness of Cefixime’s binding mechanism can be overridden by certain bacteria that produce enzymes, such as Extended Spectrum beta-Lactamases (ESBLs). These enzymes destroy the Cefixime molecule before it can reach its PBP targets, which represents a direct limitation of the drug's mechanism of action.

Dosage and Administration Information

How to use Cefixim: Administration Guidelines

Cefixime is an antibiotic intended for oral administration (per os). Specific protocols exist for its use, encompassing dosing, frequency, and administration context.


Administration Scope

Instruction Standard Guidelines
Route of Administration Oral administration only.
Adult Dosing Schedule 400 mg once daily, or 200 mg every 12 hours. A single 400 mg dose is specified for treating uncomplicated gonococcal infections.
Timing in Relation to Meals May be administered without regard to food (for the capsule and conventional tablet forms).
Duration of Treatment Treatment duration is variable, but a minimum of 10 days is typically required for infections caused by Streptococcus pyogenes.

Population and Procedural Rules

Standard rules are defined for specific patient groups and administration procedures:

  • Pediatric Dosing: For children six months of age or older, the standard dose is 8 mg/ kg/ day of the oral suspension, administered either as a single daily dose or divided into two doses.
  • Dose Adjustment: Individuals with severe renal impairment (Creatinine Clearance le 20 mL/ min) require a reduced daily dose, typically 200 mg once daily.
  • Form Restriction: The conventional tablet or capsule must not be substituted for the oral suspension when treating conditions like otitis media due to differing absorption characteristics.
  • Missed Dose: A missed dose should be taken as soon as it is remembered. However, if it is close to the time for the next scheduled dose, the missed dose should be skipped to prevent accidental double-dosing.

These guidelines collectively define the standardized clinical use of Cefixime.

Recent Clinical Evidence

Research evidence / Overview of Studies for Cefixime


Evidence for Use in Uncomplicated Urinary Tract Infections (UTI)

Research has primarily used Randomized Controlled Trials (RCTs) to explore the use of Cefixime was studied for uncomplicated infections of the lower urinary tract. These trials focused on measuring Microbiological Eradication, which is a measurement of the presence or absence of the target bacteria, and Clinical Cure, which relates to the study's measurement of physical discomfort and irritative symptoms.

Studies explored how symptoms evolved in the observed populations, with findings describing patterns related to measured bacterial clearance. Data for certain groups remain insufficient, especially concerning more complicated urinary tract conditions. Furthermore, follow-up durations were limited, meaning there is limited information for long-term outcomes, such as whether Cefixime use was associated with patterns of infection recurrence months later.


Evidence for Use in Acute Otitis Media (AOM)

The evidence for using Cefixime in middle ear infections is largely derived from Randomized Controlled Trials (RCTs) that primarily focused on pediatric patients (children). Research examined outcomes related to physical discomfort, systemic imbalance (such as fever), and measured Bacteriologic Eradication (the clearance of bacteria from the middle ear space).

Findings indicate that in the children observed during the study period, patterns related to measured clinical and bacterial outcomes were described in comparison to other studied treatments. Studies monitored responses over defined time intervals, typically 10 to 14 days after treatment began. Long-term outcomes beyond the immediate follow-up period are not fully established, as follow-up durations were limited in the initial trials.


Evidence for Use in Enteric and Respiratory Infections

Research has also explored the use of Cefixime in specific bacterial infections, including Typhoid Fever and acute exacerbations of Chronic Bronchitis. Certainty may be lower for these indications because a significant amount of the evidence is derived from observational and non-blinded studies rather than randomized controlled trials (RCTs). The results apply only to the populations studied in specific geographic regions.

Research on Pharyngitis and Tonsillitis

Cefixime was studied for bacterial throat infections. The primary focus of these trials was achieving Bacteriological Eradication. Studies primarily focus on the immediate, short-term outcomes related to the acute infection, and evidence is limited on long-term outcomes beyond bacterial clearance.


What is Still Uncertain About Cefixime Research

Key limitations exist in the broader research landscape, including that evidence quality varies across studies, and results apply only to the populations studied. A key area of uncertainty relates to the constant and natural evolution of bacterial resistance. Research is ongoing to monitor current pathogen susceptibilities, and findings help contextualize how the medicine may be studied today.

Key Studies & References

  1. Summary of Product Characteristics (SPC) for Cefixime (HPRA/EMA equivalent)
  2. Effectiveness and tolerance of cefixime in comparison with penicillin V in bacterial pharyngitis and tonsillitis in children. Cefixime Study Group (RCT)

Frequently Asked Questions (FAQ)

Common questions about Cefixim (FAQ)


Q: Is Cefixim considered a strong antibiotic?

A: Cefixim is classified by regulatory authorities as a third-generation cephalosporin antibiotic. This classification denotes a robust type of antimicrobial agent. The medicine is a bactericidal agent, meaning it works by actively killing susceptible bacteria, according to official product information.


Q: What are the most common reasons doctors prescribe Cefixim?

A: Cefixim is officially approved for the treatment of specific bacterial infections where it is known to be effective. These approved indications include acute otitis media (middle ear infection), pharyngitis, tonsillitis, acute bronchitis, and uncomplicated urinary tract infections.


Q: Do people often feel sick to their stomach when taking Cefixim?

A: Official prescribing information notes that gastrointestinal upset is a common occurrence with this medicine. These events, such as nausea and abdominal pain, are listed as common occurrences.


Q: Is it normal to have diarrhea while taking Cefixim?

A: Diarrhea or loose stools is described in official safety documents as a very common side effect, meaning it is one of the most frequently observed events. Official warnings note the importance of monitoring for the development of severe or persistent diarrhea.


Q: Are there different brand names for the same medicine, Cefixim?

A: Yes, Cefixim is the active ingredient, which may be marketed under various trade or brand names internationally. One example often cited in regulatory documents is Suprax.


Q: Are there any warnings about Cefixim and driving?

A: The official safety profile notes the potential for central nervous system side effects. These can include less common events like dizziness or vertigo, which could affect a person's ability to drive or operate machinery. The potential for these effects should be noted.


Q: Can Cefixim cause a rash that is not an allergy?

A: Official safety documents list skin rash as an uncommon side effect separate from the rare, severe allergic skin reactions that can occur. Any rash should be evaluated by a healthcare professional.


Q: How quickly does Cefixim start to work?

A: The time required for Cefixim to reach its maximum concentration in the blood, known as Tmax, is approximately four hours after taking a single oral dose. This indicates the general rate at which the medicine enters the system.


Q: How long does Cefixim stay in your system?

A: The elimination half-life of Cefixim is approximately 3 to 4 hours. The half-life refers to the time it takes for the concentration of the medicine in the body to decrease by 50%.


Q: What kind of stomach issues can Cefixim cause?

A: The most frequently reported gastrointestinal side effects are diarrhea and loose stools, which are considered very common. Other common stomach issues include nausea, abdominal pain, and flatulence, according to regulatory safety information.


Q: Can Cefixim cause a change in how my birth control works?

A: Official warnings note that certain antibiotics, including Cefixim, may reduce the effectiveness of hormonal contraceptives that contain ethinyl estradiol in some women. This noted interaction may be associated with an increased risk of unintended pregnancy or breakthrough bleeding.


Q: Does Cefixim interact with blood thinners like Warfarin?

A: Official documents describe that using Cefixim together with Warfarin and similar coumarin-type anticoagulants may enhance the effects of the anticoagulant. This has been reported to result in an increase in the prothrombin time, which measures how long it takes for blood to clot.


Q: Can Cefixim be used during pregnancy?

A: Cefixim is only recommended for use during pregnancy if clearly needed, and only when the potential benefit is determined to justify the potential risk to the fetus. Official guidelines emphasize that the use of this medicine during pregnancy is restricted to situations where it is clearly needed.


Q: Can Cefixim cause confusion or dizziness?

A: The official safety profile notes that side effects reported in post-marketing surveillance include both dizziness and confusion. While these are not among the most common effects, they are officially recognized in the drug’s prescribing information.


Q: How long does the full course of Cefixim treatment usually last?

A: The prescribed course of treatment for Cefixim depends on the specific bacterial infection being treated, so the duration can vary significantly. For certain infections caused by Streptococcus pyogenes, for instance, official guidelines mandate a minimum duration of 10 days.


Q: What happens if I stop taking Cefixim before the prescribed time?

A: For specific infections, regulatory guidelines require a minimum duration of treatment, such as 10 days. Adherence to the full prescribed course is emphasized in regulatory documentation to help achieve the intended clinical outcome.


Q: Is there any research on Cefixim resistance?

A: Research efforts, often monitored by regulatory bodies, are ongoing to track the evolution of bacterial resistance, as this is a key area of uncertainty and constant study in the antimicrobial field. Findings from these studies help inform regulatory guidelines regarding current pathogen susceptibilities to Cefixim.


Q: What is the experience of taking Cefixim like, generally?

A: The experience of taking Cefixim is primarily defined by its most frequently reported adverse effects. These include gastrointestinal side effects such as diarrhea, loose stools, nausea, and abdominal pain, as noted in official safety documents.


Q: Is Cefixim used to treat STIs?

A: Yes, Cefixim is specified in regulatory documents for treating certain sexually transmitted infections. For example, a single 400 mg dose is specified for treating uncomplicated gonococcal infections.


Q: Can Cefixim cause problems with the liver?

A: Official safety information notes that elevations in liver function tests, specifically transaminases, have been observed during clinical studies and post-marketing experience. This indicates a potential effect on liver markers.


Q: What does the research say about Cefixim in pediatric patients?

A: Research has focused extensively on the use of Cefixim in pediatric patients, particularly for infections like Acute Otitis Media (AOM). Regulatory documents define specific dosing and administration protocols for children six months of age and older.


Q: Are there any long-term side effects associated with Cefixim use?

A: The evidence base for Cefixim primarily focuses on short-term outcomes related to the acute infection being treated. Research limitations mean that long-term outcomes beyond the immediate follow-up period of clinical trials are not fully established in the literature.


Q: Why are there different strengths or forms of Cefixim available?

A: Different forms, such as the powder for oral suspension, are available to accommodate various patient populations, particularly pediatric patients who may have difficulty swallowing tablets. Furthermore, official guidelines note that different forms have differing absorption characteristics.


Q: What is the general success rate of Cefixim for its main uses?

A: The effectiveness of Cefixim in clinical trials is generally measured by two standard metrics. These metrics are microbiological eradication, which refers to the clearance of bacteria, and clinical cure, which measures the resolution of symptoms.


Q: What specific groups of people should avoid Cefixim?

A: Groups who should avoid Cefixim include those with a known allergy to Cefixim itself, or to other cephalosporins or beta-lactam antibiotics like penicillin. Additionally, safety and efficacy have not been established in children younger than six months of age.


Q: Why is the drug sometimes prescribed for only a few days?

A: While many infections require a minimum duration of treatment, regulatory documents specify that Cefixim can be prescribed for a very short course. This includes a single 400 mg dose specified for treating uncomplicated gonococcal infections.

How should Cefixim be stored and disposed of?

How to Store and Dispose of Cefixime

The storage and disposal instructions for Cefixime are defined by regulatory authorities to maintain the product's integrity and safety.


Storage Requirements

  • Tablets/Capsules/Dry Powder must be stored at Controlled Room Temperature (20 C to 25 C).
  • All forms require protection from excessive heat and moisture and must be kept in the tightly closed original container.
  • The medication must always be stored out of the reach of children.

Stability and Disposal

  • The reconstituted liquid suspension must be discarded after 14 days.
  • Unused or expired Cefixime should be disposed of via a drug take-back program or by mixing with an undesirable substance before disposal in household trash. Cefixime is not recommended to be flushed down the sink or toilet.

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

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