Cefoxitina

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Cefoxitina

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 Cefoxitina

Property Description
Active Ingredient Cefoxitin sodium
Form Powder or Solution for Injection
Pharmacological Class Cephamycin (beta-Lactam antibiotic)
General Purpose Systemic Anti-infective
Origin Semi-synthetic

Cefoxitina is a prescription-only, semi-synthetic beta-lactam antibiotic defined by its active pharmaceutical ingredient, Cefoxitin sodium. It functions as a systemic anti-infective and is used to eliminate harmful bacteria, primarily in the context of treating or preventing serious bacterial infections.


What Type of Antibiotic is Cefoxitina?

Cefoxitina is classified as a cephamycin, a distinct subset within the broader beta-lactam antibiotic family. This classification is rooted in the drug's origin as a derivative of the naturally occurring substance cephamycin C, which is sourced from the bacterium Streptomyces lactamdurans. Cefoxitin is particularly noted for its high stability against destruction by bacterial defense enzymes, known as beta-lactamases. This characteristic indicates the medicine is designed to remain effective even against common resistant bacteria.

Cefoxitin is structurally differentiated from standard cephalosporins due to a unique 7-alpha-methoxy group. This feature is clinically recognized for enhancing the molecule's resistance profile, which is a key differentiating factor from earlier generations of beta-lactam drugs.


Cefoxitina's Composition and Physical Form

The medicine is a single-ingredient product consisting only of the active compound, Cefoxitin sodium. It is exclusively supplied as a sterile powder for injection or a prepared solution for injection. Unlike medications taken by mouth, Cefoxitina is intended for parenteral administration (intravenous or intramuscular injection) to ensure immediate and reliable systemic distribution throughout the body. This delivery method is essential for achieving the high, therapeutic concentrations required for effective bactericidal action against entrenched infections, often used in a hospital or surgical setting.


What is the General Purpose of Cefoxitin?

The general purpose of Cefoxitin is to act as a potent agent that actively kills susceptible bacteria by disrupting the construction of their protective cell wall. This bactericidal mechanism rapidly eliminates the source of infection. Its superior resistance to beta-lactamase enzymes is its key general benefit, allowing it to address infections caused by bacteria that are difficult to eliminate with less resistant beta-lactam drugs. Cefoxitin remains an important therapeutic option for a broad range of susceptible pathogens.

What side effects are possible with Cefoxitina?

Cefoxitina: Possible Side Effects and Safety Information

The safety profile of Cefoxitin sodium is established through regulatory documentation, classifying documented reactions by their frequency and the physiological system affected. This information strictly reflects official labeling and governmental health authority data.


Official Adverse Reaction Classification

Adverse effects are categorized based on their documented occurrence in clinical settings:

  • Common Reactions (affecting 1 to 10 users in 100) often involve hematological changes such as eosinophilia and leukopenia, gastrointestinal upset like diarrhea, rash, and transient elevation of serum transaminases (liver enzymes).
  • Uncommon Reactions include local issues at the injection site such as phlebitis/thrombophlebitis.
  • Rare Reactions documented include serious outcomes such as Acute Kidney Injury or Renal Failure.

Serious Adverse Reactions and Safety Constraints

The regulatory profile identifies several reactions as serious, regardless of their rarity. These include severe hypersensitivity events like anaphylaxis and angioedema, severe skin reactions (Stevens-Johnson Syndrome, Toxic Epidermal Necrolysis), and potentially life-threatening gastrointestinal issues like pseudomembranous colitis.

Specific safety constraints are noted in official labeling:

  • Contraindication: Cefoxitina is absolutely contraindicated in individuals with a documented history of immediate-type hypersensitivity reaction to any beta-lactam antibiotic, including penicillins or cephalosporins.
  • Population Note: Patients with pre-existing renal impairment may require heightened attention, and the documentation notes that severe kidney injury has been observed, particularly at high doses. Cefoxitin use is also linked to a Positive Direct Coombs' Test and may influence prothrombin time.

Overdose and Emergency Response

Overdose and when to seek help

Official regulatory information regarding Cefoxitina (Cefoxitin sodium) overdose is strictly based on documented clinical manifestations and required emergency procedures. In the event of excessive dosage, the official labeling indicates that patients may experience signs of Central Nervous System (CNS) toxicity, including convulsions or seizures. A severe outcome documented following overdose is acute renal tubular necrosis.

The prescribing information mandates that individuals seek immediate medical attention for the first sign of adverse reactions or suspected overdose. Immediate implementation of appropriate monitoring and management of the patient is required, as the treatment is specified as being symptomatic and supportive.

Specific population risk factors are noted in the official profile. Patients with preexisting renal impairment or renal failure are at an increased risk for severe manifestations, such as CNS toxicity and convulsions, due to the diminished clearance of the medicine. Furthermore, old patients (geriatric population) are noted to be at an increased risk for acute renal tubular necrosis, particularly when coupled with renal impairment.

While no specific antidote is known, regulatory documents confirm that Cefoxitina is removed to some extent by haemodialysis, which may be used as a supportive procedural measure to manage high systemic drug concentrations.

Therapeutic Uses of Cefoxitina

Cefoxitina is applied across domains where additional symptomatic support is needed across many therapeutic areas. It may be part of symptomatic management for serious bacterial infections.

The medication is applicable within clinical settings that involve acute or disruptive symptom patterns, and is commonly used across conditions presenting with acute episodes such as septicemia, complicated intra-abdominal infections and abscesses, severe pneumonia, and complex gynecological infections including PID. The central benefit assists with maintaining functional stability and supports general well-being during symptomatic phases.

It is particularly relevant in clinical settings that involve acute or unstable symptom patterns, including polymicrobial cases involving challenging anaerobic bacteria or those involving inflammatory or irritative processes.

Furthermore, Cefoxitina is considered relevant for prophylaxis during high-risk surgery, such as colorectal or gynecological procedures. This contributes to improved comfort, helping patients cope more steadily by easing the risk of postoperative complications.


Quick Fact: Relief for Acute Symptomatic Episodes Cefoxitina is commonly used to help with symptoms related to systemic imbalance, such as high fever and chills, when these symptoms are linked to organ-specific functional stress.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who Can and Cannot Use Cefoxitina?

Cefoxitina's eligibility profile is strictly governed by regulatory classifications detailing who is permitted to use the medicine and who is formally excluded.


Absolute Contraindications

The medicine is contraindicated for patients with a documented hypersensitivity to the active ingredient, Cefoxitin, or to any antibiotic belonging to the cephalosporin group. Official labeling further advises caution for individuals with a history of severe allergic reactions to penicillins or other beta-lactam drugs due to the potential for cross-allergenicity.


Population and Condition-Based Restrictions

Use is officially established for adults, adolescents, and pediatric patients 3 months of age and older. Safety and efficacy have not been established for infants younger than three months, and no recommendation is made for this age group.

Patients with impaired renal function require mandatory dosage adjustment to mitigate the risk of high serum concentrations. The drug should be used with caution in patients with a history of colitis or other severe gastrointestinal disease. Regarding pregnancy, safety has not been established; use is allowed only if the medical benefit is determined to outweigh potential hazards. The drug is excreted into human milk during lactation.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Cefoxitin sodium's regulatory profile documents several interactions, categorized by their mechanism and resulting clinical outcome.


Documented Pharmacokinetic and Pharmacodynamic Interactions

Interacting Substance Official Interaction Outcome Type of Interaction
Probenecid Increases and prolongs Cefoxitin's plasma concentration (serum level). Renal Transporter Inhibition
Aminoglycoside Antibiotics Increased potential for nephrotoxicity (kidney damage). Additive Pharmacodynamic Risk
Oral Anticoagulants Potential to enhance the anticoagulant effect (e.g., Warfarin). Class Pharmacodynamic Effect

The interaction with Probenecid is classified as a pharmacokinetic effect due to the inhibition of Cefoxitin's elimination via renal tubular secretion. The risk of nephrotoxicity is a formally documented additive pharmacodynamic effect when Cefoxitin is combined with Aminoglycoside antibiotics (such as Gentamicin). Regulatory caution is necessary when co-administering with these substance classes.

Laboratory Test Interference

Cefoxitin is officially documented to interfere with certain diagnostic procedures. It can cause a false-positive reaction to glucose in the urine when tests utilizing Benedict's or Fehling's solutions are used. The drug may also lead to falsely high serum creatinine levels when analysis is performed using the Jaffe method; collecting blood samples less than two hours after administration should be avoided for accurate results. Patients with azotemia (impaired kidney function) are noted in regulatory documents to have an increased likelihood of developing a positive direct Coombs test.

Mechanism of Action

How Cefoxitin Works: Mechanism of Action

Inhibition of Bacterial Cell Wall Assembly

Cefoxitin achieves a bactericidal effect through molecular interaction with susceptible bacteria by directly targeting the family of enzymes known as Penicillin-Binding Proteins (PBPs), which are crucial for synthesizing the bacterial cell wall. By binding covalently and irreversibly to the PBPs, Cefoxitin blocks the final, essential step of peptidoglycan cross-linking. This structural failure causes the bacterium to be unable to withstand internal osmotic pressure, leading to cell lysis.

️ Stability Against beta-Lactamase Enzymes

A structural characteristic of Cefoxitin is its stability against degradation by many common bacterial defense proteins called beta-lactamases. This stability, conferred by the unique 7-alpha-methoxy group on the molecule, ensures the drug remains chemically intact to reach and inhibit its PBP targets. This characteristic allows the mechanism to proceed, resulting in a bactericidal effect against bacteria that employ typical enzymatic resistance. This targeted structural collapse is the fundamental physiological process that results in the loss of viability of susceptible bacterial populations.

Dosage and Administration Information

How to use Cefoxitina

Cefoxitina (Cefoxitin sodium) is administered exclusively through parenteral routes—either via intravenous (IV) injection or infusion or via deep intramuscular (IM) injection. It is supplied as a sterile powder that requires mandatory reconstitution with a specified sterile diluent before it can be administered.


Administration and Frequency

Cefoxitin dosing is calculated by patient weight and kidney function, ensuring systemic distribution at fixed intervals. The maximum total adult daily dosage is limited to 12 grams.

Usage Context Standard Adult Administration Pattern (Example)
Routine Treatment 1 gram IV/IM administered every 6 to 8 hours (Q6H–Q8H).
Severe Treatment 1 to 2 grams IV administered every 4 to 8 hours, often at a fixed Q6H interval.
Surgical Prophylaxis 1 to 2 grams IV administered 30–60 minutes before incision, followed by doses every 6 hours for up to 24 hours.

For pediatric patients older than three months, dosing is typically based on body weight, with a total daily amount of 80 to 160 mg per kilogram divided into four to six equal doses. There is no specific dosing recommendation for patients from birth to three months of age.


Special Procedural Requirements

Administration for patients with impaired kidney function requires an initial loading dose, but subsequent maintenance doses must be lowered or the frequency reduced based on measured Creatinine Clearance (CrCl) values. When given intravenously, the injection should be delivered slowly over three to five minutes, or administered via intermittent or continuous infusion. For treatment of certain infections caused by beta-hemolytic streptococci, the course duration is set at a minimum of 10 days.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Cefoxitina

This section provides an overview of the official research and studies that was studied for Cefoxitina, focusing on the types of trials and the populations studied, without giving advice or making claims about individual outcomes.


Evidence for Treating Established, Serious Infections

Research has examined Cefoxitina's use in serious bacterial illnesses, including infections in the abdomen, female reproductive organs, lower lungs, and blood infections (septicemia). Early research primarily involved Randomized Controlled Trials (RCTs) and comparative clinical studies that was studied for use in serious conditions.

These studies monitored several key outcomes. Researchers tracked outcomes related to clinical status and if laboratory tests indicated outcomes related to pathogen elimination. The trials also monitored measures of patient mortality and looked at the rates of Recurrence of Infection following treatment.


Evidence for Preventing Post-operative Infection (Surgical Prophylaxis)

Cefoxitina was studied for its role in preventing infections that may occur after certain high-risk surgeries. Research has focused on procedures like colorectal and gynecological surgery. A major focus of the research was on Pharmacokinetic/Pharmacodynamic (PK/PD) studies.

These studies examined if the drug achieved and maintained target antibiotic concentrations within the specific tissues involved in surgery, such as fat tissue. Research describes that the achievement of target antibiotic concentrations in surgical tissue was observed in some studies to depend on the exact method and timing of drug delivery. Research is ongoing to explore different dosing protocols for patients with higher body mass.


Main Evidence Gaps and Areas of Uncertainty

The research highlights several areas where certainty remains low or where more studies are needed. A key limitation is that the primary evidence base for treating infections is historical, and the medicine may have been replaced by newer drugs for many uses.

While research describes its outcomes related to bacterial stability against certain resistant bacteria, data are still emerging for its role against many newer forms of highly resistant bacteria. The evidence quality varies across studies, and research is ongoing to explore different administration protocols in surgical prophylaxis. Findings describe group patterns, not personal outcomes.

Key Studies & References Cefoxitin Injection Drug Information

Frequently Asked Questions (FAQ)

Common questions about Cefoxitina (FAQ)

Q: How quickly does Cefoxitina begin to work against an infection?

Regulatory documents state that after a single dose is administered intravenously, the concentration of the drug in the blood rises very quickly, achieving mean peak levels in approximately five minutes. The time it takes for the concentration of the medicine to drop by half in the bloodstream (the half-life) is approximately 41 to 59 minutes.


Q: Is Cefoxitina effective against antibiotic-resistant bacteria?

Official information notes that Cefoxitina is stable against beta-lactamases, which are defense enzymes produced by some bacteria that can lead to resistance. This feature is documented as a characteristic that supports its activity against certain bacteria that may be resistant to other antibiotics.


Q: Is Cefoxitina related to or similar to other drugs ending in '-cillin' or '-sporin'?

Yes, Cefoxitina is classified as a cephamycin antibiotic. This class of medicine is a specific type of beta-lactam antibiotic that is chemically related to the cephalosporin class of drugs, which often end in '-sporin'.


Q: Can Cefoxitina be given to children, and if so, at what age?

The use of Cefoxitina is established for pediatric patients 3 months of age and older. Official labeling has not established specific recommendations for use in patients from birth to three months of age.


Q: What types of bacteria is Cefoxitina generally effective against (Gram-positive, Gram-negative, anaerobic)?

Official product information describes the medicine as having activity against many isolates of Gram-positive bacteria (excluding Enterococci), many Gram-negative bacteria (excluding Pseudomonas aeruginosa), and a broad range of anaerobic organisms.


Q: How is the storage of Cefoxitina powder different from the mixed solution?

The dry powder form of the medication should be stored at room temperature (20 C to 25 C). Once the powder is reconstituted (mixed) with a sterile diluent, the solution is typically stable for 24 hours at room temperature or for up to 7 days if refrigerated (below 5 C).


Q: Can Cefoxitina be used in patients with known kidney or liver problems?

For patients with impaired kidney function, mandatory dosage adjustment is required to mitigate the risk of high and prolonged drug concentrations. Transient elevations in liver enzyme levels and jaundice have also been reported.


Q: What should be done with unused or expired Cefoxitina medication?

Unused or expired product should not be disposed of in household waste or flushed down the toilet. Official guidance describes that it should be disposed of through an authorized medication take-back program.


Q: Is Cefoxitina safe for people who have a history of colitis or other gastrointestinal issues?

Official prescribing information notes that Cefoxitina should be used with caution in patients with a history of colitis or other severe gastrointestinal disease. This caution is due to the potential risk of developing Clostridium difficile-associated diarrhea (CDAD), which can be a serious condition.


Q: Is it possible to receive Cefoxitina treatment at home?

Cefoxitina is exclusively supplied as a sterile powder for parenteral administration, meaning it must be given by injection (IV or IM). This route of administration is typically utilized in a hospital, surgical center, or other clinical setting.


Q: What is the half-life of Cefoxitina in the body?

The time it takes for the concentration of the medicine to drop by half in the bloodstream (the half-life) is approximately 41 to 59 minutes. This half-life is observed to be longer in patients who have impaired kidney function.


Q: Can Cefoxitina make certain neurological conditions, like seizures or myasthenia gravis, worse?

Official labeling documents the potential for exacerbation of myasthenia gravis. Seizures have also been reported in association with cephalosporin-class antibiotics, particularly in patients with kidney impairment when the dose was not appropriately reduced.


Q: Is Cefoxitina used to treat sexually transmitted diseases like gonorrhea?

Official indications have included the treatment of uncomplicated gonococcal infection caused by susceptible strains of Neisseria gonorrhoeae in specific clinical settings. However, it is noted that Cefoxitin is not active against the pathogen that causes chlamydia.


Q: How is Cefoxitina typically prepared or mixed for IV administration?

Cefoxitina is supplied as a sterile powder that requires mandatory reconstitution with a specified sterile diluent before it can be used. It is then administered either via slow intravenous injection over several minutes or by infusion.


Q: Why do doctors check blood work when Cefoxitina is used for a long time?

Long-term use has been associated with changes in certain blood parameters. These changes, documented in regulatory profiles, include transient elevations in liver enzymes and the development of a Positive Direct Coombs Test.


Q: Can Cefoxitina cause dizziness or confusion?

Reported adverse reactions include confusion. These effects are generally associated with the neurological effects documented for the cephalosporin class. The official profile also includes reports of dizziness.


Q: Is Cefoxitina given for routine infections like the common cold or flu?

Cefoxitin is indicated only for the treatment or prevention of infections proven or strongly suspected to be caused by bacteria. The drug is not indicated for the treatment of viral infections, such as the common cold or flu, but rather for infections proven or strongly suspected to be bacterial.


Q: Why is Cefoxitina used as a reference drug for testing methicillin resistance?

The regulatory documents provide criteria for interpreting the results of a standardized test using a 30-mug Cefoxitin disk. This test is a required and common laboratory practice for evaluating the susceptibility of staphylococci, including identifying those that are methicillin-resistant.

How should Cefoxitina be stored and disposed of?

The storage and disposal of Cefoxitin sodium must strictly follow the conditions defined in official regulatory labeling to maintain potency and safety.

Official Storage and Stability

The dry powder for injection must be stored between mathbf2 and 25 C (mathbf36 to 77 F), and exposure to temperatures above 50 C must be avoided. The dry material or solution may darken, but this discoloration does not affect the drug's potency.

State of Product Storage Condition Maximum Stability Period
Reconstituted Solution Room Temperature (mathbf25 C) mathbf24 hours
Reconstituted Solution Refrigerated (mathbf<5 C) mathbf1 week
Frozen Solution Freezer (mathbfleq-20 C) mathbf30 weeks

Handling and Disposal Requirements

Do not refreeze solutions after they have been thawed. Any unused solution or frozen material must be discarded after the documented stability period has elapsed. As a safety precaution, the medicine must be kept out of the sight and reach of children. Unused or expired drug should not be disposed of via wastewater or household waste; rather, it should be disposed of through an authorized medication take-back program.

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

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