Alsef

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Medically reviewed

Laura Arias

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 Alsef

This section provides a factual overview of the medicine Alsef, defining its core composition, pharmacological class, and identity.


Property Description
Active ingredient Cefotaxime (typically as Cefotaxime sodium)
Form Powder for solution for injection
Pharmacological class Third-Generation Cephalosporin, Antibiotic
General purpose Elimination of systemic bacterial infections
Origin Semisynthetic

What is Alsef and What is its Active Ingredient?

Alsef is the brand name for the pharmaceutical product containing the active ingredient Cefotaxime, an established, prescription-only anti-infective agent. The substance is typically supplied as Cefotaxime sodium, which is essential for preparing an injectable solution. Cefotaxime is chemically defined as a semisynthetic compound, meaning its structure is derived from a natural antibiotic core and then chemically modified to enhance its stability and effectiveness, a process that improves its resistance profile.

Alsef's Classification: A Third-Generation Cephalosporin

Alsef is classified as an antibiotic belonging to the beta-Lactam family, specifically identified as a third-generation cephalosporin. This classification highlights the medicine's ability to provide a wide-ranging, broad-spectrum of activity against many Gram-positive and Gram-negative bacterial types. It is supplied as a sterile powder for solution for injection, intended for parenteral administration when rapid, systemic delivery is necessary. Cefotaxime is a powerful tool designed for the direct and swift elimination of susceptible bacteria.

How Does Alsef Generally Fight Bacteria?

The action of Cefotaxime is strictly bactericidal—it directly kills susceptible bacteria rather than simply inhibiting their growth. This is achieved by interfering with the integrity of the bacterial cell wall synthesis. This precise mechanism causes the cell wall to fail, leading to the breakdown and subsequent death of the bacterial organism. Third-generation cephalosporins are critical components in the anti-infective arsenal for their ability to combat a wide array of microbial threats, making Alsef a decisive tool against bacterial invasions.

Regulatory References

  1. Cefotaxime Injection: MedlinePlus Drug Information
  2. Cefotaxime - StatPearls - NCBI Bookshelf - NIH

What side effects are possible with Alsef?

Official Safety Profile of Alsef (Cefotaxime)

The safety profile for Alsef, containing the active ingredient Cefotaxime, is formally established by government regulatory authorities, defining potential adverse effects and specific safety constraints.

Adverse reactions are classified according to frequency, with a significant number of effects categorized as uncommon (occurring in ge 1/1,000 to <1/100 patients) or as frequency not known (reported in post-marketing experience, making an estimation impossible).

Uncommon effects include blood changes such as leukopenia and eosinophilia, as well as convulsions, diarrhea, and transient increases in liver enzymes and bilirubin. Effects classified as frequency not known include life-threatening reactions such as anaphylactic shock, severe bullous skin reactions (e.g., Stevens-Johnson syndrome), pseudomembranous colitis, and neurotoxicity manifesting as encephalopathy.

The official profile groups adverse reactions by System-Organ Classes, documenting potential effects on the blood and lymphatic system, nervous system, gastrointestinal tract, skin, and renal systems. The risk of neurotoxicity is noted as a specific safety concern for patients with renal impairment, where drug exposure is increased. Additionally, the label documents that arrhythmia can occur following rapid intravenous administration through a central venous catheter. Monitoring of blood white cell counts is required for treatment extending beyond seven to ten days, as prolonged use is associated with haematological changes like agranulocytosis. The use of Cefotaxime reconstituted with Lidocaine is formally contraindicated in infants under 30 months of age.

Overdose and Emergency Response

The official regulatory documents define the overdose profile of Alsef (Cefotaxime) by detailing specific neurological and systemic manifestations, along with mandated emergency procedures for when to seek immediate help.

Documented Overdose Presentations and Risks

Category Official Regulatory Statement
CNS and Systemic Signs Overdose is clinically characterized by signs of encephalopathy (including impairment of consciousness and abnormal movements) and convulsions (seizures). Other manifestations may include weakness, cyanosis, and dyspnea (difficulty breathing).
Severe/Life-Threatening The risk of a potentially life-threatening arrhythmia has been documented, particularly when the medicine is administered too rapidly through a central venous catheter.
Population Risk Patients with renal insufficiency face an increased risk of neurotoxicity from high plasma concentrations, which is a key consideration noted in prescribing information.

Mandatory Emergency Actions

  • Seek emergency medical attention immediately or contact the Poison Help line if overdose is suspected or severe symptoms occur.
  • The drug must be discontinued immediately if drug-associated seizures are observed.
  • Management relies on providing symptomatic and supportive treatment, as no specific antidote is known.

The overall regulatory profile dictates that severe neurological events and the risk of cardiac irregularity represent the most critical outcomes of overdose or inappropriate administration. Immediate medical intervention is required for these documented manifestations, with treatment focused on managing symptoms and controlling seizures.

Therapeutic Uses of Alsef

What Alsef Treats: Main Uses and Benefits

Alsef is used for managing severe bacterial infections. It is commonly used across conditions presenting with acute episodes where bacteria have invaded key systems. These indications include sepsis (bloodstream infection), bacterial meningitis, severe lower respiratory tract infections (such as pneumonia), complicated intra-abdominal infections (such as peritonitis), and severe infections of the genitourinary tract and bone/joints.

The medication is applied in clinical settings that involve acute or unstable symptom patterns, addressing groups of symptoms that may become intense or disruptive, such as high fever, chills, acute pain, and difficulty breathing.

“Alsef is relevant when supportive symptom management is appropriate in high-acuity contexts.”

It is also applied as empiric therapy in critically ill patients and for use before or after certain surgical procedures to support against infection. This provides support that helps ease the overall symptom burden for specialized infections and assists with maintaining functional stability during periods of heightened discomfort for both adult and pediatric groups.


Quick Fact: Relief for Systemic Distress Alsef plays a role in managing symptoms related to systemic imbalance by targeting the underlying bacterial cause, which contributes to improved comfort during periods of heightened symptoms.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Alsef is contraindicated for patients with a documented history of hypersensitivity to Cefotaxime or any other cephalosporin antibiotic. A known history of major allergy to penicillin or other beta-lactam drugs dictates non-eligibility due to the risk of cross-sensitivity.

Use is conditional in patients with severe renal impairment (kidney disease); the maintenance dose must be modified to prevent drug accumulation and the risk of neurotoxicity. Caution is also advised for older adults due to age-related kidney decline.

Alsef is approved for use in adults, adolescents, and children. Use in neonates (infants 0–4 weeks) is subject to specific maximum doses due to immature kidney clearance. Caution is required in patients with a history of colitis or severe diarrhea.

Regarding reproductive status, use during pregnancy is advised only if clearly needed, as the drug crosses the placental barrier. Nursing mothers must use Alsef with caution, as it is excreted in breast milk.

*A specific regulatory restriction applies: if Alsef is reconstituted with Lidocaine as a solvent, that formulation is contraindicated for intravenous (IV) administration and for infants under 30 months of age.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Alsef (Cefotaxime) has formally documented interaction patterns primarily concerning drug clearance, additive toxicity risks, and specific administration requirements, as detailed in regulatory labeling.

Interactions Affecting Drug Clearance

The co-administration of the uricosuric agent Probenecid is a documented interaction that interferes with the renal tubular transfer process responsible for eliminating Cefotaxime from the body. This mechanism results in higher and more prolonged plasma concentrations of Cefotaxime, officially reducing the drug’s total clearance by approximately 50%.

Interactions Increasing Toxicity Risk

Cefotaxime may potentiate the nephrotoxic effects of other agents. This pharmacodynamic risk is documented when the medicine is used concomitantly with Aminoglycoside antibiotics or Potent Diuretics, such as Furosemide. Regulatory documents require the monitoring of kidney function for patients, particularly the elderly or those with pre-existing renal impairment, when these combinations are used.

Physical and Administration Constraints

Due to physical and chemical incompatibility, Cefotaxime and Aminoglycoside antibiotics must not be mixed in the same syringe or intravenous perfusion fluid. Additionally, the Cefotaxime solution that has been constituted with Lidocaine Injection BP is formally contraindicated for the intravenous route of administration.

Interaction with Diagnostic Tests

Alsef may cause non-specific interference in certain laboratory procedures, including a false positive direct Coombs' test and false positive results for urinary glucose when copper reduction methods are utilized.

Mechanism of Action

Molecular Targeting of Bacterial Cell Wall Assembly

The core mechanism of Alsef is the covalent inactivation of Penicillin-Binding Proteins (PBPs), which are bacterial enzymes essential for building the rigid cell wall. Specifically, the drug binds irreversibly to PBPs, such as PBP3, thereby arresting the final cross-linking step in the peptidoglycan synthesis pathway. This molecular interference immediately compromises the structural integrity of the bacterial organism.


Initiation of Bactericidal Cascade

The sudden, irreversible halt of cell wall construction triggers a physiological failure cascade, transitioning from molecular action to a definitive cellular outcome. The structural defect activates the bacteria's own autolytic enzymes (autolysins), which actively degrade the existing cell wall. This combined action causes the bacterial cell to rapidly lose osmotic stability and undergo lysis, resulting in the direct, bactericidal physiological effect.


Prolonged Mechanistic Activity

The overall duration of the drug's action is extended by metabolic conversion, where a portion of the drug is transformed into desacetylcefotaxime. This molecule is an active metabolite that retains the same core mechanism of action, continuing to inhibit PBPs. This sustains the molecular blockade of cell wall synthesis, contributing to the drug's sustained physiological effect against the target bacteria.

Dosage and Administration Information

How Alsef is Used: Official Administration Guidelines

Alsef (Cefotaxime) is administered exclusively in a supervised medical setting as a parenteral anti-infective agent, meaning it is delivered by injection. Usage follows standardized protocols to ensure proper delivery and dosing.

Administration Scope

Feature Official Guideline
Route of Administration Intravenous (IV) bolus injection, IV infusion, and deep Intramuscular (IM) injection.
Dosing Schedule Adults typically receive 1 g to 2 g every 8 to 12 hours. For severe infections, the dose increases to 2 g every 6 to 8 hours, up to a maximum of 12 g per day.
Preparation The sterile powder requires mandatory reconstitution with a specified diluent, such as Water for Injection, prior to administration.
Procedural Conditions An IV bolus must be injected slowly over 3 to 5 minutes. An IV infusion is administered over 20 to 60 minutes. If the daily dose exceeds 2 g, the IV route is preferred over IM.

Population and Duration Rules

Feature Official Guideline
Population Rules Dosing for neonates and children is calculated based on weight (mg/kg/day). For patients with severe renal impairment (CrCl le 10 mL/min), the dosage should be halved following the initial loading dose.
Course Duration Therapy typically continues for a minimum of 48 to 72 hours after fever has subsided or for at least 3 to 4 days after symptoms have resolved.

Solutions reconstituted specifically with lidocaine for IM use must not be administered intravenously under any circumstances. These official guidelines define the standardized protocol for administering the medicine, ensuring delivery aligns with established clinical standards.

Recent Clinical Evidence

Alsef: Research Evidence Overview

Evidence for use in Sepsis and Bacterial Meningitis

Research examined the use of Cefotaxime in conditions associated with acute or disruptive episodes, such as sepsis and severe bloodstream infections. The research primarily consists of short-term Randomized Controlled Trials (RCTs) and observational studies that focused on hospitalized adults and critically ill children. Researchers explored important clinical measurements, including all-cause mortality/survival rates and clinical response status during the hospital stay. Studies reported measurements of clinical status and survival across the patient groups observed.

The evidence base for bacterial meningitis includes numerous prospective and retrospective clinical trials which examined outcomes related to neurological function and bacterial reduction. The trials reported measurements of the rate and timing of bacterial reduction in the CSF across different age groups. The findings help contextualize how patients reported their experience and provide insight into short-term changes.


Evidence for Respiratory and Intra-Abdominal Infections

Research examined the use of Cefotaxime in conditions characterized by fluctuating or episodic manifestations, such as severe lower respiratory tract infections (e.g., pneumonia) and complicated intra-abdominal infections. Research explored clinical response status and measurements related to the length of hospital stay. For intra-abdominal infections, Cefotaxime was evaluated in combination with other antibiotics, and trials described patterns in clinical cure rates.


Studies in Special Populations and Research Gaps

Clinical research examined specific patient groups including pediatric groups (critically ill children and neonates) and patients with comorbid conditions (e.g., those with spontaneous bacterial peritonitis). Results apply only to the populations studied, meaning findings may not be predictive for groups not included.

Research efforts monitored patient outcomes over defined, generally short, time intervals. The durability of the clinical response or the rates of infection recurrence are not fully established over many months or years. The key limitations documented by researchers include issues with the consistency of drug concentrations achieved in severely ill patients, and the comparative evidence is lacking for some of the newer antibiotic regimens.

Key Studies & References

  1. Cefotaxime - StatPearls - NCBI Bookshelf (Indications and Spontaneous Bacterial Peritonitis)
  2. Optimal dose of cefotaxime in neonates with early-onset sepsis: A developmental pharmacokinetic model-based evaluation - Frontiers
  3. NG240 Meningitis (bacterial) and meningococcal disease: recognition, diagnosis and management - NICE (Guidance on comparative effectiveness)

Frequently Asked Questions (FAQ)

Common questions about Alsef (FAQ)

Q: Where can I find summaries of the clinical research evidence for Alsef?

Official sources like the FDA Prescribing Information and the European Medicines Agency (EMA) Summary of Product Characteristics (SmPC) are the authoritative places to find summaries of the clinical research. These government-mandated documents outline the studies conducted to support the drug's approved uses and indications.


Q: What does the term 'contraindication' mean in relation to Alsef?

The official product information uses the term 'contraindication' to describe a specific condition or patient history where the drug should not be used. This usually occurs when the known risks, such as a severe allergy to Alsef or similar antibiotics, are judged to clearly outweigh any potential benefit.


Q: Why might the time it takes for Alsef to work vary significantly between different patients?

Regulatory data shows that how quickly the drug is cleared from the body (known as drug clearance) can vary significantly between patients. This variation is often based on factors like a patient's age (e.g., neonates) or their existing renal (kidney) function, which alters the drug's presence over time.


Q: Is Alsef intended for short-term use, or is it a long-term therapy?

Alsef is defined by regulatory documents for short courses of therapy, often lasting days or a few weeks. This approach is reflected in its official dosage schedule, which is designed for frequent administration due as the drug has a relatively short half-life in the body.


Q: Is Alsef a first-line treatment for the condition it addresses?

Official clinical guidelines often list Alsef as a primary or key alternative agent for certain serious infections, such as bacterial meningitis and septicemia. However, whether it is considered the absolute 'first-line' choice depends on the specific type of infection being treated and local antibiotic resistance patterns.


Q: Can Alsef be taken with common pain or fever relievers?

Regulatory documents state that Alsef may interact with common pain relievers. Specifically, there is a noted potential for increased risk to the kidneys when used with Acetylsalicylic acid (Aspirin), and an awareness of altered levels of Acetaminophen in the body.


Q: How long does it usually take to feel the initial effects of Alsef?

Pharmacokinetic data, which tracks how the drug moves through the body, indicates Alsef is rapidly absorbed after an injection. Peak concentrations in the bloodstream are typically reached in less than 30 minutes following an intravenous dose.


Q: Can Alsef interact with over-the-counter cold and flu remedies?

Because common cold and flu remedies often contain ingredients like Acetaminophen or Acetylsalicylic acid (Aspirin), official documents note potential interactions. Combining Alsef with these remedies could lead to altered levels of the drugs in the body or potential issues affecting the kidneys.


Q: Is there a known interaction between Alsef and herbal supplements?

Official patient information describes that herbal or vitamin supplements should be used with caution alongside Alsef. This general caution is given because specific drug interaction studies with all herbal supplements may not have been conducted.


Q: Does Alsef cause drowsiness or affect the ability to operate machinery?

The official adverse effects profile for Alsef includes neurological events such as dizziness, confusion, and encephalopathy (a form of brain disorder). These reported effects may impair a patient's ability to drive or safely operate heavy machinery.


Q: How long after stopping Alsef does the drug typically stay in the body?

The elimination half-life of Cefotaxime, the active ingredient in Alsef, is relatively short, approximately 1 to 1.5 hours in adults with normal kidney function. The half-life describes the time it takes for the amount of drug in the body to decrease by half.


Q: Is Alsef available as a generic drug, or is it only brand name?

Cefotaxime, which is the active ingredient in Alsef, is not only known by the brand name. Official regulatory drug monographs confirm that Cefotaxime is widely available as a generic medication.


Q: Why is Alsef only available with a prescription from a healthcare provider?

Alsef is classified as a potent, systemic, broad-spectrum antibiotic. Its use is regulated and restricted to prescription status to ensure it is administered correctly, allows for complex management of treatment, and supports efforts to control antimicrobial resistance.


Q: Is Alsef known to be habit-forming or create dependency?

The drug is officially classified as a non-controlled antibiotic medication. Regulatory safety documents contain no warnings or reports regarding the drug having habit-forming potential or causing dependency.


Q: Is Alsef known to cause changes to mood or sleep patterns?

Neurotoxicity, which refers to potential adverse effects on the nervous system, is a listed safety concern for Alsef, especially in patients with kidney problems. This condition may potentially include changes to mental state or behavior.

How should Alsef be stored and disposed of?

The storage and disposal of Alsef (Cefotaxime sodium powder for injection) must strictly follow official regulatory guidelines to maintain potency and ensure safety.

Mandatory Storage Conditions

The unopened dry powder vial must be stored at Controlled Room Temperature, which is typically mandated to be below 30 C in most regions. It is an explicit requirement to keep the vial in the outer carton to protect the contents from light and excessive heat, which can lead to discoloration and reduced stability over the product's 3-year shelf-life.

Handling and Disposal

Once reconstituted, the solution should be used immediately on microbiological grounds. While chemical stability may allow for a maximum of 24 hours of refrigeration (2 C to 8 C), unused solution must be discarded immediately after use as the product is a single-use preparation.

For public safety, Alsef must be secured out of the sight and reach of children.

Expired or unused medicine must not be thrown into household waste or flushed down the drain. It must be disposed of through a dedicated pharmaceutical take-back program or as directed by a pharmacist according to local regulatory requirements.

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

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