Nucef

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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 Nucef

The medicine Nucef is a strictly prescription-only medicine that contains the active pharmaceutical ingredient Cefixime. Its primary function is derived from its precise action as a bactericidal agent, meaning it is formulated to actively kill susceptible bacterial pathogens, thereby serving as a systemic antimicrobial.

Property Description
Active ingredient Cefixime
Form Tablet and Oral Suspension
Pharmacological class Cephalosporin Antibiotic
General purpose Broad-spectrum antimicrobial action
Origin Semisynthetic

What Type of Medicine is Nucef (Cefixime)?

Nucef belongs to the classification of cephalosporin antibiotics, which are a large group of synthetic agents chemically related to penicillins. The active compound Cefixime is specifically classified as a third-generation cephalosporin. This classification reflects an expanded capability against various Gram-negative bacteria and improved stability compared to older cephalosporin generations. The substance is also known as a semisynthetic cephalosporin due to its derivation from a naturally occurring source, subsequently modified in the laboratory. This advanced profile is recognized for its efficacy against certain common bacterial infections.

Composition and Available Forms of Nucef

The medication is a single-ingredient product composed of the active component Cefixime (INN), which is frequently supplied in the form of its salt, Cefixime Trihydrate. Nucef is primarily intended for oral administration, meaning it is taken by mouth for systemic absorption. The effective oral absorption of Cefixime allows for its use as a common agent for systemic antibacterial treatment. This allows the medication to effectively deliver the active ingredient throughout the patient's system via its common tablet and oral suspension dosage forms. The liquid suspension form is often highlighted for its utility in treating pediatric or geriatric patient groups who may have difficulty swallowing solid tablets.

General Purpose as a Bactericidal Agent

The general purpose of Nucef is to resolve health conditions caused by the growth and proliferation of susceptible bacteria through a targeted, lethal action. As a bactericidal agent, Cefixime exerts its effect by interfering with the synthesis of the bacterial cell wall, a critical protective structure unique to the pathogen. This mechanism is the basis for how the drug works to clear infections by directly causing bacterial cell death. For instance, it is typically employed in scenarios requiring the elimination of bacterial pathogens from the respiratory or urinary tracts. This specific action ensures the permanent elimination of the pathogenic source, which is the core benefit and primary function of this broad-spectrum antimicrobial therapy.

What side effects are possible with Nucef?

Possible Side Effects and Safety Information

The official safety profile for Nucef, which contains Cefixime, is established by government regulatory agencies through classifications based on clinical trials and post-marketing surveillance. This information strictly describes the officially documented risks without providing clinical advice.


Adverse Reaction Scope

The most frequently reported adverse effects are categorized as Common, primarily affecting the Gastrointestinal System. These often include diarrhea, loose stools, abdominal pain, nausea, and dyspepsia. Other systems documented in regulatory texts include the Immune System, Hemic and Lymphatic System, and the Renal and Hepato-biliary systems, which are associated with less frequent or transient changes.

Serious Adverse Reactions and Safety Considerations

The regulatory profile explicitly documents the potential for rare but serious adverse reactions. These include severe Hypersensitivity Reactions such as Anaphylaxis and life-threatening Severe Cutaneous Adverse Reactions (e.g., Stevens-Johnson Syndrome). Additionally, the risk of severe intestinal inflammation, specifically Clostridium difficile-Associated Diarrhea (CDAD), is noted, with symptoms that may appear during or up to two months after treatment cessation.

Safety notes specify that patients with existing Renal Impairment may require adjusted monitoring, as impaired kidney function can increase the risk of systemic effects like seizures or encephalopathy. Caution is also required in individuals with a known history of Penicillin Hypersensitivity due to the potential for cross-reaction, a formally documented safety restriction.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documents state that an overdose of Nucef (Cefixime) carries a significant risk of neurotoxicity, which may manifest as encephalopathy and related central nervous system disturbances.

Overdose Manifestations Severe Outcomes
Convulsions, Seizures Encephalopathy, Acute Renal Failure Risk
Confusion, Abnormal Movements Severe Neurological Compromise

The documented manifestations of overdose include convulsions, confusion, impaired consciousness, and other abnormal movements. This risk of severe neurological symptoms is particularly elevated when overdose occurs in patients with pre-existing impaired renal function.

In the event of a suspected overdose, regulatory authorities mandate that the patient immediately seek emergency medical attention or call the Poison Help line. Urgent emergency services must be contacted if the affected individual has collapsed, is experiencing a seizure, has trouble breathing, or cannot be awakened.

Management procedures are constrained by the fact that no specific antidote is known for Cefixime overdose. Treatment is therefore symptomatic and supportive, which may involve procedures like gastric lavage. Official information also confirms that techniques such as hemodialysis or peritoneal dialysis are not effective for removing the medication from the circulation in significant quantities.

Therapeutic Uses of Nucef

Nucef (Cefixime) is an antibiotic therapy used to help address acute bacterial infections across several key domains, and is relevant for easing symptomatic discomfort. This medication is commonly used to treat infections of the ears, throat, tonsils, urinary tract, and airways. Its therapeutic profile is applied across domains where additional symptomatic support is needed in situations involving distressing symptoms.


What Nucef Helps Manage: Therapeutic Domains

This medication is applied in addressing symptom clusters that may become intense or disruptive, such as symptoms related to pharyngitis, otitis media, and the dysuria and urgency of uncomplicated UTIs. It is also used across conditions presenting with acute or fluctuating manifestations, including bacterial bronchitis and specific systemic or gastrointestinal infections. The treatment provides support that helps ease the overall symptom burden.

“It is commonly used across conditions presenting with acute episodes, offering symptomatic relief that supports the patient during difficult episodes by easing distress.”

Quick Fact: Relief for Acute Localized Discomfort

Nucef is commonly used when symptoms related to inflammatory or irritative states create functional strain. It provides supportive relief when symptoms interfere with routine activities.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Official Eligibility Profile for Nucef (Cefixime)

Eligibility to use Nucef is strictly governed by the population restrictions and contraindications documented in official government regulatory labels.

Eligibility Status Patient Group/Condition
Absolutely Contraindicated Known allergy or hypersensitivity to Cefixime, any cephalosporin antibiotic, or a history of severe reaction to any penicillin or other beta-lactam drug.
Restricted/Conditional Use Patients with markedly impaired renal function (requiring dose adjustment).
Individuals with a history of colitis or known bleeding problems (requires caution).
Not Established Infants less than six months of age (safety and efficacy data are insufficient).
Established/Allowed Use Adults and adolescents (>12 years); Pediatric patients (ge 6 months).

Eligibility for pregnancy is restricted to cases where the medication is deemed clearly needed or essential by a prescriber (FDA Category B). During lactation, official guidance advises consideration for temporarily discontinuing nursing as it is unknown if the drug is excreted in human milk. Elderly patients are generally eligible under adult conditions, unless severe renal impairment is present.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

Official regulatory documents identify specific medicinal products and substance categories that require monitoring or management when used concurrently with Nucef (Cefixime).

Documented Interacting Agents and Constraints

The primary concerns involve agents that affect blood clotting and a specific anticonvulsant, based on postmarketing reports and clinical data reflected in regulatory labeling.

Interacting Medicine Category Specific Interacting Agent Official Constraint or Requirement
Anticoagulants (e.g., Vitamin K Antagonists) Warfarin and others Requires close monitoring of coagulation indices (e.g., Prothrombin Time) with or without observed bleeding.
Anticonvulsants Carbamazepine Requires drug monitoring or surveillance for potential elevations of Carbamazepine plasma concentrations.

Official Interaction Structure

The simultaneous use of Nucef with Warfarin or other anticoagulants has been officially associated with an increased Prothrombin Time. This effect requires active management through coagulation testing to mitigate potential risks. For the anticonvulsant Carbamazepine, regulatory information indicates that elevated plasma levels have been reported when co-administered with Nucef. This finding mandates that plasma concentrations of Carbamazepine be monitored to detect and manage these alterations. These specific requirements form the basis of the official interaction profile for Nucef, guiding practitioners on necessary monitoring protocols.

Mechanism of Action

How Nucef Works: A Bactericidal Mechanism

Nucef (Cefixime) operates exclusively through a direct, targeted interference with the biological machinery of susceptible bacteria. Its mechanism causes the physical breakdown and lysis of the bacterial cell.


Irreversible Targeting of Bacterial Cell Wall Synthesis

The drug's primary action is the irreversible inhibition of Penicillin-Binding Proteins (PBPs), which are bacterial enzymes essential for building the protective peptidoglycan layer of the cell wall. By binding covalently to the PBP active site, Cefixime permanently blocks the final cross-linking step in the cell wall construction pathway. This targeted molecular interference leads to a loss of structural rigidity in the bacterial cell, which establishes the structural instability required for the subsequent physiological consequence.


Mechanistic Cascade: From Enzyme Blockade to Osmotic Lysis

The failure to properly construct the cell wall causes the bacterial cell to become highly unstable and unable to withstand the normal fluid pressures surrounding it (osmotic pressure). This initiates a mechanistic cascade resulting in the activation of self-destruct enzymes within the pathogen, leading to the cell membrane rupturing and the cell contents spilling out (lysis). This sequence of events is the resultant physiological consequence of the mechanism, which causes the irreversible death of the susceptible bacterial cells.


Limitations Due to Enzymatic Deactivation

The drug's mechanism is fundamentally reliant on the integrity of its chemical structure. However, the action may be constrained when certain bacteria produce beta-lactamase enzymes. These enzymes act as a molecular counter-mechanism by cleaving the drug's active chemical structure, deactivating Cefixime before it can bind to the PBPs. This failure to reach and inhibit the target enzyme prevents the structural breakdown cascade from initiating, allowing the bacterial cells to maintain viability.

Dosage and Administration Information

The administration of Nucef (Cefixime) follows standardized patterns for administration, dose, and duration. This third-generation cephalosporin is administered exclusively via the oral route using available forms, which include tablets, capsules, chewable tablets, and a powder for oral suspension.


Administration Scope: Official Guidelines

Instruction Official Guideline
Standard Adult Dose 400 mg daily, administered either as a single 400 mg dose or in two divided doses (200 mg every 12 hours).
Timing Tablets and capsules may be taken without regard to food.
Course Duration The treatment course for infections caused by Streptococcus pyogenes must be at least 10 days.
Pediatric Dosing For children weighing less than or equal to 45 kg, the dose is 8 mg/kg/day of the oral suspension.

Procedural Structure and Adjustments

The instructions define specific procedural conditions related to the dosage form. The oral suspension requires reconstitution with water prior to initial use and must be shaken well before measuring each subsequent dose. When the chewable tablet form is used, it must be chewed or crushed before swallowing. Furthermore, administration protocols include dosage adjustments for patients with reduced kidney function (creatinine clearance less than or equal to 60 mL/min) to prevent medication accumulation; for example, the dose is typically reduced to 260 mg daily for moderate impairment.


Recent Clinical Evidence

Research evidence / Overview of studies for Nucef (Cefixime)

The research available for Cefixime (Nucef) is primarily based on clinical trials and systematic reviews, which form the foundation for understanding how this medication has been studied. The goal of this evidence is to contextualize the design and focus of studies involving specific bacterial infections, detailing the measured events related to pathogen observation and symptom change.


Evidence for use in Uncomplicated Urinary Tract Infections (UTIs)

Research on Cefixime for uncomplicated UTIs involved Randomized Controlled Trials (RCTs) and controlled clinical studies. The key metrics that studies examined were bacteriological measurements (negative cultures) and patient-reported outcomes describing perceived discomfort related to acute symptoms. The findings describe patterns observed in the studies by reporting the rates of negative cultures at the tested follow-up point. However, long-term outcomes are not well characterized regarding recurrence rates or follow-up beyond the immediate infection period.


Evidence for use in Acute Otitis Media

The evidence base for middle ear infections largely involves comparative trials and RCTs that studies explored in children (infants 6 months and older). These studies examined outcomes capturing phases of heightened symptom activity alongside the observation of bacterial pathogens. The research highlights changes measured during the study period relating to how frequently negative cultures were observed. Comparative trials indicate that findings were mixed when certain common ear infection bacteria, like Streptococcus pneumoniae, were involved.


Key Limitations and Areas of Scientific Uncertainty

The scientific evidence available for Cefixime, while providing context for its studied uses, does contain recognized limitations. A number of the core trials are older, and in some areas, comparative evidence is lacking against the full range of newer treatments now available. Sample sizes were modest in some studies, and evidence quality varies across studies based on design and methodology. Furthermore, long-term outcomes are not fully established across all indications, meaning that the available data offer research exploring short-term symptom changes but little insight into outcomes beyond the immediate post-treatment period.

Key Studies & References

  1. CEFIXIME - FDA Verification Portal (Used for general approved indications and regulatory context)

Frequently Asked Questions (FAQ)

Common questions about Nucef (FAQ)

Q: How quickly should I expect Nucef to start working?

A: Regulatory documents indicate that the active ingredient, Cefixime, typically reaches its highest level in the bloodstream about 3 to 4 hours after you take a dose. This time frame gives context on the time frame associated with the medication's systemic absorption.

Q: Does Nucef have an immediate effect or does it take time to build up?

A: According to official product information, Nucef’s action is not immediate; it begins working as the drug is absorbed into your system. Maximum drug levels in the blood are generally achieved within 3 to 4 hours after administration.

Q: Is it common to feel tired when taking Nucef?

A: Official safety documents do not list general tiredness or fatigue among the most frequently reported side effects. Adverse events that occur in patients are continuously monitored and documented in the official safety profile.

Q: What should I do if I forget a dose of Nucef?

A: If a dose is missed, regulatory instructions mention taking the dose upon remembrance. However, if it is almost time for the next dose, the missed dose is typically skipped. The regular dosing schedule is generally maintained thereafter.

Q: Are there any common foods or drinks I need to avoid while on Nucef?

A: The official administration guidance states that Nucef tablets and capsules can be taken without regard to food. Regulatory documents do not list any specific common foods or drinks that require strict avoidance during therapy.

Q: Can I use Nucef if I have stomach sensitivity or acid reflux?

A: Official safety warnings note that caution is required for individuals who have a history of specific gastrointestinal diseases, such as colitis. This information is provided in regulatory documents to guide prescribers in managing potential risks.

Q: Does Nucef affect birth control pills?

A: Regulatory documents on drug-drug interactions do not list Cefixime as having a known interaction that reduces the effectiveness of hormonal oral contraceptives.

Q: Is it safe to drive or operate machinery while taking Nucef?

A: Official product information notes that certain side effects, such as dizziness, have been reported infrequently. These reports serve as information regarding potential effects that may alter performance of skill-based tasks.

Q: How long does Nucef stay in your system after you stop taking it?

A: Regulatory pharmacokinetic data indicates that the half-life of the active ingredient, Cefixime, is approximately 3 to 4 hours. The half-life is the time it takes for the amount of drug in the body to be reduced by half.

Q: Can Nucef cause mood changes or anxiety?

A: According to the official safety profile, rare reports of temporary central nervous system or psychiatric effects, including agitation and anxiety, have been documented. This information is gathered from clinical trials and post-marketing surveillance.

Q: Do research studies show that Nucef is effective for its main use?

A: Clinical studies summarized in regulatory documents focused on specific susceptible bacterial infections, reporting observed bacteriological outcomes and symptom changes. Research also examined changes in patient-reported symptoms during the study periods.

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

A: The official safety profile notes that certain serious adverse events, such as Clostridium difficile-associated diarrhea (CDAD), have been documented to occur during treatment or up to two months after the medicine is stopped. Official research summaries often note that long-term outcomes following treatment are not fully characterized.

Q: Why is Nucef used for specific conditions but not others?

A: The drug is formally indicated only for infections caused by organisms that official microbiology testing has identified as susceptible to the active ingredient, Cefixime. If an infection is caused by a resistant organism, the drug's mechanism is limited.

Q: Can Nucef affect blood sugar levels?

A: Official adverse event reporting includes infrequent reports of temporary changes in metabolic markers. This has involved transient increases in blood glucose levels in some documented cases.

Q: Is there a generic version of Nucef available?

A: Regulatory public records confirm that the active ingredient, Cefixime, is available in generic form.

Q: How important is it to finish the full course of Nucef?

A: Regulatory guidance specifies the minimum duration of treatment, which is a specific requirement. This required duration is established to support the elimination of the bacterial organism and help reduce the potential for recurrence.

Q: Is Nucef typically prescribed for short-term or long-term use?

A: Nucef is generally prescribed for acute bacterial infections. The typical duration of treatment outlined in official guidelines usually ranges from about 7 to 14 days.

Q: Can Nucef make skin more sensitive to the sun?

A: Official adverse reaction lists include various skin-related events, such as rash. However, a specific warning for photosensitivity (increased skin sensitivity to the sun) is not commonly documented in regulatory labeling.

Q: Are there any differences between the brand-name Nucef and a generic equivalent?

A: Regulatory agencies require that all generic versions of Cefixime meet the same strict standards for quality, strength, purity, and performance as the brand-name product. The active ingredient remains identical in both formulations.

Q: What does the official patient information say about discontinuing Nucef?

A: Official patient counseling advises against stopping the medication before the full course is completed, even if symptoms show improvement. Treatment should continue unless otherwise instructed by a prescriber.

Q: Can Nucef cause dizziness?

A: Dizziness has been reported infrequently in the official adverse event data documented for this medication. This is a potential but not common effect recorded in the safety profile.

Q: Is it okay to drink alcohol in moderation while on Nucef?

A: Official regulatory documents do not list a specific interaction warning or constraint related to the consumption of alcohol with the active ingredient, Cefixime.

Q: What should I ask my doctor about before starting Nucef?

A: Official guidance identifies factors relevant for discussion with the prescriber. These include any known allergies, a history of kidney impairment or colitis, and the use of interacting agents like warfarin or carbamazepine.

Q: Is Nucef associated with weight changes?

A: Regulatory documents do not list weight gain or weight loss among the common or frequent adverse effects that are recorded in the official safety profile.

Q: Can Nucef affect sleep patterns?

A: Official adverse reaction lists include rare reports of temporary central nervous system effects, such as insomnia (difficulty sleeping). This effect is considered uncommon in the overall safety profile.

Q: What level of research evidence supports Nucef’s safety profile?

A: The safety profile of Nucef is established through accumulated data. This evidence comes from both controlled clinical trials and ongoing post-marketing surveillance reports, which are collected and reviewed by regulatory agencies.

Q: Is it normal to have a slight headache after starting Nucef?

A: Headache has been reported infrequently in the official adverse event data documented for this medication. If this occurs, it is generally considered an uncommon finding in the safety profile.

Q: Can Nucef be crushed or split if a patient has trouble swallowing pills?

A: The official administration instructions specify that only the chewable tablet form is designed to be chewed or crushed. Guidance for standard tablets and capsules is to swallow them whole.

Q: What happens if Nucef is accidentally taken twice close together?

A: Regulatory documents on overdosage state that taking very high quantities may result in temporary adverse effects. At very high levels, potential symptoms such as encephalopathy (brain dysfunction) or seizures have been reported.

Q: Do regulatory bodies consider Nucef to have a high risk of dependency?

A: The drug is not classified as a controlled substance by regulatory agencies. This classification indicates that the medicine does not have an officially recognized potential for dependence or abuse.

Q: Are there specific medical tests needed before starting Nucef?

A: Official guidance mandates that certain laboratory parameters must be monitored only when the medicine is used in conjunction with specific interacting agents or in patients with pre-existing kidney impairment. Routine testing is not mandated in all cases.

Q: What should I do if a side effect of Nucef seems unusual or severe?

A: Official patient information advises that if signs of a severe allergic reaction or other serious adverse events occur, discontinuation of the medication is advised. Attention should be sought immediately to address the event.

How should Nucef be stored and disposed of?

Storage and Disposal Requirements for Nucef (Cefixime)

The official storage conditions for Nucef (cefixime) are defined by the dosage form and stability requirements.

Storage Conditions

Dosage Form Required Storage Conditions
Tablets/Capsules/Dry Powder Store at Controlled Room Temperature (20 C to 25 C), protected from light and moisture.
Reconstituted Suspension May be stored at Room Temperature or Refrigerated (2 C to 8 C). Do not freeze.

The reconstituted liquid suspension is stable for a maximum of 14 days and must be discarded after 14 days regardless of storage temperature. The container must be kept tightly closed.

Child Safety and Disposal

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

Unused or expired medicine should be discarded using a drug take-back program or by following standard FDA household disposal guidelines to ensure responsible and safe handling.

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

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