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Cefixime 100 Mg/5ml

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Cefixime 100 Mg/5ml

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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.

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Overview of Cefixime 100 Mg/5ml

Quick Facts: Cefixime 100 Mg/5ml

Property Description
Active ingredient Cefixime (Cefixime trihydrate)
Form Oral suspension (Liquid preparation)
Pharmacological class Third-generation cephalosporin; beta-lactam antibiotic
General purpose Systemic bacterial pathogen eradication
Origin Semisynthetic compound

What Pharmacological Class Does Cefixime 100 Mg/5ml Belong To?

Cefixime 100 Mg/5ml is a prescription-only medicine classified as a semisynthetic beta-lactam antibiotic, belonging specifically to the third-generation cephalosporin class. The active ingredient is Cefixime, which is chemically synthesized and functions as a powerful systemic agent against bacterial pathogens. This classification is clinically recognized for providing enhanced stability against certain bacterial defense mechanisms, such as beta-lactamase enzymes, which older antibiotic classes may lack. Cefixime is an established agent used to treat susceptible infections. This means the medicine is specifically recognized for its ability to target and help eliminate bacterial infections in the body.

Why is Cefixime 100 Mg/5ml Formulated as an Oral Suspension?

Cefixime 100 Mg/5ml is presented as an oral suspension, a liquid preparation where the active ingredient is finely dispersed in an aqueous suspension vehicle. This format is a defining characteristic, making it a critical pediatric formulation that facilitates the oral route of administration for children or any individual who has difficulty swallowing solid medications. The concentration of 100 mg/5 ml defines this specific preparation, ensuring the precise amount of the Cefixime is available per unit volume for accurate dosing. This liquid form is used for antibiotic administration where delivery to children is necessary, serving as a practical necessity for accurate medication delivery in these target patient populations.

What is the General Purpose of this Systemic Antibiotic?

The general purpose of this systemic antibiotic is to achieve bacterial pathogen eradication by using a bactericidal mechanism to resolve underlying systemic bacterial infections. As a broad-spectrum antimicrobial agent, Cefixime functions by directly killing susceptible bacteria throughout the body. Its physiological action involves interfering with the bacteria's ability to build and maintain their cell wall synthesis, thus defining its role as a curative systemic agent. A common use scenario involves addressing acute infections caused by susceptible bacterial strains, helping the patient's system eliminate the microbial cause of the illness.

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What side effects are possible with Cefixime 100 Mg/5ml?

Possible Side Effects and Safety Information

The safety profile of Cefixime 100 mg/5 mL oral suspension is defined by adverse reactions categorized by their frequency and the body system affected, based on authoritative regulatory labeling.

Frequency-Classified Adverse Reactions

Adverse reactions are classified by the likelihood of their occurrence:

  • Common (may affect up to 1 in 10 people): Diarrhea.
  • Uncommon (may affect up to 1 in 100 people): Headache, dizziness, abdominal pain, nausea, vomiting, dyspepsia, pruritus (itching), and transient increases in liver enzymes.
  • Rare (may affect up to 1 in 1,000 people): Hypersensitivity reactions (e.g., hives, angioedema) and certain changes in blood counts (e.g., leukopenia).

System Organ Class (SOC) Safety Groups

Reported effects are grouped by the body system involved, including Gastrointestinal Disorders, Skin and Subcutaneous Tissue Disorders, Blood and Lymphatic System Disorders, and Immune System Disorders.

Serious Adverse Reactions

Although rare, certain severe reactions are documented in regulatory sources and require immediate attention. These include:

  • Severe Cutaneous Adverse Reactions (SCARs): Such as Stevens-Johnson Syndrome (SJS), Toxic Epidermal Necrolysis (TEN), and Drug reaction with eosinophilia and systemic symptoms (DRESS).
  • Clostridium difficile-Associated Diarrhea (CDAD): Which can range from mild to life-threatening and may occur even months after treatment has ended.
  • Anaphylaxis and Severe Allergic Reactions.
  • Acute Kidney Injury (nephritis).

Population and Safety Restrictions

Safety constraints and necessary precautions are specified for certain patient groups:

  • Hypersensitivity: Cefixime is contraindicated in patients with a history of severe allergic reactions to Cefixime, other cephalosporins, or a history of immediate severe hypersensitivity to penicillin or other beta-lactam drugs.
  • Renal Impairment: A dose reduction is required for patients with significant kidney function impairment, as defined by their creatinine clearance.
  • Laboratory Interference: This medication can cause false-positive results for certain laboratory tests, including the direct Coombs’ test and specific tests for glucose and ketones in the urine.
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Overdose and Emergency Response

Overdose and When to Seek Help

All information regarding overdose is derived strictly from official government regulatory sources, detailing the documented manifestations and mandated emergency procedures.


Officially Documented Overdose Profile

Domain Official Regulatory Statements
Documented Overdose Presentations Gastrointestinal symptoms, including nausea, vomiting, and diarrhea; potential for reversible encephalopathy (rarely).
Physiological Systems Affected Primarily gastrointestinal system; potential for central nervous system (CNS) effects (e.g., convulsions).
Population-Specific Overdose Notes Risk of convulsions is increased in patients with pre-existing renal impairment due to reduced drug clearance.
Emergency-Response Statements Treatment must be symptomatic and supportive. May involve considering gastric lavage and administering activated charcoal. No specific antidote is known.

Seeking Urgent Medical Attention

Regulatory documents mandate that individuals must seek immediate medical attention when an overdose of Cefixime is suspected. Since no specific antidote is known, management focuses on supportive care and limiting drug absorption. Hemodialysis or peritoneal dialysis are not considered effective means of drug removal. Close clinical monitoring may be required, particularly for patients with compromised kidney function who face an increased risk of severe outcomes, such as convulsions, following the ingestion of high doses.

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Therapeutic Uses of Cefixime 100 Mg/5ml

What Cefixime 100 Mg/5ml Treats: Main Uses and Benefits

The therapeutic scope of this medication involves acute bacterial infections that cause symptoms related to systemic imbalance or physical discomfort in multiple areas of the body. This approach to managing acute bacterial infections is commonly used to help with conditions that present with acute or disruptive episodes, including uncomplicated urinary tract infections (UTIs), otitis media (middle ear infection), pharyngitis, tonsillitis, and acute bacterial flare-ups of chronic bronchitis.

The medication is applied in clinical settings where short-term symptomatic assistance is needed to address bacterial pathogens, and may offer support that helps ease the overall symptom burden. As a pediatric formulation, it assists in managing symptoms that interfere with daily comfort in children and other patients requiring liquid administration.

“The primary role of this medication is providing supportive relief when symptoms linked to a bacterial pathogen become disruptive.”


Quick Fact: Relief for Acute Discomfort

Symptom Domain Conditions Managed Patient-Oriented Benefit
Localized Pain & Fever Otitis Media, Pharyngitis, Tonsillitis Supports comfort during periods of heightened symptoms.
Urinary Distress Uncomplicated UTIs May assist in supporting functional stability by easing painful urination.
Systemic Illness Typhoid Fever, Shigellosis May provide support to help ease overall distress during difficult episodes.

Regulatory References

  1. NIH DailyMed overview
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Eligibility and Restrictions for Use

Who Can and Cannot Use Cefixime 100 Mg/5ml?

The population eligibility for Cefixime 100 mg/5ml is strictly defined by regulatory documentation concerning age, allergy status, and pre-existing medical conditions.

Absolute Non-Eligibility (Contraindications)

This medicine is contraindicated and must not be used by individuals with a known hypersensitivity or allergy to Cefixime itself, to any other cephalosporin antibiotic, or to a history of severe immediate reaction to penicillin or other beta-lactam antibiotics.

Age and Developmental Status

The oral suspension is approved for adults and pediatric patients six months of age or older. Safety and efficacy have not been established for use in infants under six months of age, and use in this group is generally not recommended. Older adults typically use the standard adult dose unless severe kidney impairment is present.

Conditional Use and Restrictions

Certain populations require caution or dose adjustment as defined by the official labeling:

  • Renal Impairment: Use is restricted and requires a conditional dose adjustment for patients with impaired kidney function (e.g., low creatinine clearance).
  • Pregnancy and Lactation: Use during pregnancy is generally reserved only if clearly needed/essential. Nursing mothers should consider discontinuing breastfeeding temporarily.
  • Gastrointestinal History: Use requires caution in patients with a history of Gastrointestinal Disease, particularly Colitis.
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What should I know about interactions with other medicines?

Official Interaction Profile

This section describes documented interaction patterns between Cefixime and other medicinal products or substances, as formalized in government regulatory labeling.

Interaction Type Interacting Substances (Examples) Official Regulatory Outcome
Exposure Modification (Cefixime) Probenecid, Nifedipine Probenecid reduces Cefixime's renal clearance through competition for tubular secretion, resulting in elevated plasma concentrations. Nifedipine, a calcium channel blocker, may increase Cefixime's bioavailability by up to 70%.
Exposure Modification (Co-drug) Warfarin/Coumarin Anticoagulants, Carbamazepine An increased prothrombin time has been reported with anticoagulants, necessitating the monitoring of coagulation parameters. Elevated plasma levels of Carbamazepine have also been reported in postmarketing experience.
Pharmacodynamic/Efficacy Loss Live Bacterial Vaccines, Hormonal Contraceptives Co-administration with live bacterial vaccines (e.g., Typhoid live) is not recommended because the antibacterial action may reduce vaccine efficacy. Cefixime may also lead to the decreased effectiveness of oral hormonal contraceptives.
Additive Toxicity Nephrotoxic Agents, Strong-Acting Diuretics Combination with potentially nephrotoxic substances, such as aminoglycoside antibiotics, or strong-acting diuretics, poses an increased risk of additive impairment of renal function.

Population and Monitoring Notes: The risk of additive nephrotoxicity is specifically heightened for patients with restricted renal function when Cefixime is combined with nephrotoxic agents, a situation requiring particular monitoring of kidney function. The regulatory information establishes these constraints based on pharmacokinetic or pharmacodynamic effects; no mandatory timing rules for dose separation are documented, nor are formal interactions with food or herbal products detailed.

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Mechanism of Action

How Cefixime 100 Mg/5ml Works: Mechanism of Action

Cefixime acts by irreversibly binding to Penicillin-Binding Proteins (PBPs), which are specific enzymes (transpeptidases) found in the bacterial cell membrane. This molecular interaction prevents the bacteria from completing its essential cell wall construction pathway.


The inhibition of PBPs blocks the final step in synthesizing the rigid peptidoglycan layer—the cross-linking of structural monomers. This failure causes the bacterial cell wall to become structurally compromised, leading directly to the cell's inability to withstand its high internal osmotic pressure.


This structural compromise and subsequent osmotic instability result in the lysis (rupture) of the bacterial cell. This mechanism provides a direct bactericidal effect, resulting in the reduction of susceptible bacterial cell viability.

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Dosage and Administration Information

How Cefixime 100 Mg/5ml is Used: Administration Guidelines

Cefixime 100 mg/5 ml is administered strictly via the oral route, consistent with its formulation as a liquid suspension. The standardized approach to using this medicine follows specific dosage, frequency, and preparation protocols.


Standard Dosage and Frequency Patterns

The typical adult daily dosage is 400 mg, which may be taken either once daily or divided into two equal 200 mg doses administered every 12 hours. The duration of the treatment course is generally established as a short-term regimen, typically ranging from 7 to 14 days, based on the specific condition being addressed.


Administration Context and Adjustments

Administration of the oral suspension can occur with or without food. Prior to measuring any dose, the container must be shaken vigorously to ensure the uniform distribution of the active ingredient. The exact volume of the dose must be measured using a calibrated measuring device provided with the product.

For the pediatric population (six months and older), the daily dosage is calculated based on body weight, commonly at 8 mg/kg per day. A high-level procedural constraint for use in adults with severe renal impairment is the reduction of the daily dose, typically to 200 mg once daily, to prevent systemic accumulation.


Handling Missed Doses

If a dose is missed, it should be taken immediately upon remembering. However, if the time for the subsequent scheduled dose is near, the missed dose should be skipped, and the regular schedule resumed. A double dose should not be taken to compensate for a skipped one.

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Recent Clinical Evidence

The research evidence for Cefixime 100 Mg/5ml primarily consists of Randomized Controlled Trials (RCTs) and controlled studies used to evaluate its role in managing several acute bacterial infections. Research focused on two main outcomes: the clinical response (how symptoms evolved in the observed populations) and the pathogen status (the status of infectious bacteria measured post-treatment).

Studies were conducted for conditions such as uncomplicated urinary tract infections (UTIs), pharyngitis, and tonsillitis. Findings describe patterns observed in the microbial status of bacteria like E. coli. For throat infections, research explored outcomes related to a treatment duration of at least 10 days and monitored the subsequent pathogen status.

Cefixime was also studied for otitis media (middle ear infection) in pediatric patients from 6 months of age, and for acute exacerbations of chronic bronchitis (AECB) in adults. Clinical response rates were assessed in comparison trials, and research highlighted that the results for infections caused by Streptococcus pneumoniae were evaluated against comparator treatments. The medicine was also studied for typhoid fever, though the response results were observed to be variable across different studies.

Key limitations across the research record include that data are not established for infants younger than 6 months of age for any indication. Furthermore, long-term effects are not fully established regarding the prevention of subsequent disease, such as rheumatic fever following throat infection treatment. For most indications, the available evidence primarily describes patterns observed during the acute infection episode, meaning follow-up durations were defined as short.

Key Studies & References

  1. Cefixime Suspension Labeling (DailyMed/NIH) - Prescribing Information
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Frequently Asked Questions (FAQ)

Common questions about Cefixime 100 Mg/5ml (FAQ)

Q: How quickly does Cefixime 100 Mg/5ml start working?

A: Regulatory information indicates that after taking Cefixime by mouth, the highest concentration of the medicine in the bloodstream is generally reached within 2 to 6 hours. While the medication begins acting at a molecular level right away, the full treatment course for an infection is typically established as a short-term regimen, ranging from 7 to 14 days.

Q: Can Cefixime 100 Mg/5ml cause diarrhea?

A: Yes, diarrhea is classified as a common adverse reaction in official regulatory documents. Gastrointestinal effects, including diarrhea, abdominal pain, nausea, and vomiting, are known to occur during use of the medication.

Q: Why does Cefixime sometimes cause stomach upset?

A: Cefixime, similar to other antibacterial agents, can alter the normal balance of bacteria in the colon, which may lead to gastrointestinal disturbances. This change in the intestinal flora is why stomach upset, including nausea, vomiting, and abdominal pain, is sometimes reported.

Q: What is the age limit for using Cefixime suspension?

A: The oral suspension is approved for use in adults and in pediatric patients who are six months of age or older. Official labeling states that the safety and effectiveness have not been established for infants less than six months old.

Q: Are there any risks when Cefixime is used during pregnancy?

A: Use during pregnancy is a factor that requires caution, according to regulatory documents. Official guidance reserves the use of Cefixime during pregnancy only if it is clearly needed or essential. The decision to use this medicine during pregnancy is determined by a healthcare professional based on individual circumstances.

Q: How long does Cefixime stay in the body after the last use?

A: Official pharmacological data indicates that the elimination half-life of Cefixime, which is the time it takes for half of the drug to be removed from the body, typically ranges from 2.4 to 4 hours in adults with normal kidney function. The medicine is gradually eliminated by the body over time.

Q: What happens if a scheduled time is missed?

A: Regulatory guidance on a missed dose describes taking the dose immediately upon remembering. However, if it is nearly time for the subsequent scheduled dose, the missed dose should be skipped entirely, and the regular schedule should be resumed. It is explicitly advised against taking a double dose to compensate for a skipped one.

Q: What is the definition of 'pseudomembranous colitis' mentioned in drug information?

A: Pseudomembranous colitis is an inflammation of the colon that has been reported with the use of nearly all antibacterial drugs, including Cefixime. It is a condition that can range in severity from mild to life-threatening. Official labeling requires caution in patients with a history of gastrointestinal disease, particularly colitis.

Q: Is Cefixime use linked to yeast infections?

A: The use of antibiotics can sometimes lead to secondary infections, such as candidiasis (yeast infection), due to the alteration of the body's natural microbial flora. Postmarketing regulatory reports have noted other fungal infections, and vaginal itching or discharge is also listed as a known adverse event.

Q: Is the liquid Cefixime dose stable once it is mixed?

A: Yes, the reconstituted liquid suspension is stable, but for a limited time. Official handling instructions indicate the suspension has a shelf life of 7 to 14 days after preparation, depending on the specific product's instructions and storage temperature. Any unused portion must be discarded after this stability period.

Q: What if Cefixime does not seem to be working?

A: Regulatory documents emphasize that Cefixime is indicated only for infections proven or strongly suspected to be caused by susceptible bacteria. If the medicine does not appear to be working, it may be due to the infection being caused by a non-susceptible pathogen or by a non-bacterial (e.g., viral) cause.

Q: What is the difference between Cefixime and Amoxicillin?

A: Cefixime and Amoxicillin belong to two different, though related, chemical classes of antibiotics. Cefixime is officially classified as a third-generation cephalosporin, while Amoxicillin belongs to the penicillin class. Both are beta-lactam antibiotics, but their specific molecular structures and clinical profiles differ.

Q: Are there any risks when Cefixime is used during lactation (breastfeeding)?

A: Official documentation indicates Cefixime should be used with caution during breastfeeding. The decision to use Cefixime during breastfeeding should be made in consultation with a healthcare professional to discuss the potential risks in relation to individualized circumstances.

Q: What are the signs of an allergic reaction to Cefixime?

A: Signs of a serious allergic reaction, which is a rare event, may include hives, rashes, difficulty breathing, or swelling of the face, lips, tongue, or throat. Hypersensitivity reactions are listed in official documents as rare events that require immediate attention.

Q: Is a rash always a sign of a serious Cefixime allergy?

A: No. While a rash is a sign of a potential allergy, it is not always serious. Regulatory labeling lists a simple rash or itching (pruritus) as an uncommon adverse reaction. However, a rash is also a key feature of Severe Cutaneous Adverse Reactions (SCARs), which are rare but serious and require immediate professional attention.

Q: Can Cefixime affect blood tests or lab results?

A: Yes, regulatory information states that Cefixime can cause false-positive results for specific laboratory tests. This interference includes the direct Coombs’ test and certain specific tests for glucose and ketones in the urine.

Q: Is it normal to feel tired while using Cefixime?

A: General tiredness or weakness is not listed as a common side effect in regulatory documents, but it has been noted in less common postmarketing reports. Unusual fatigue or weakness is also documented as a possible sign of rare blood cell count issues.

Q: Does Cefixime cause drowsiness?

A: Drowsiness (somnolence) is not listed as a common or uncommon side effect in official regulatory documentation. The nervous system effects that are listed in the safety profile typically include headache and dizziness.

Q: Is Cefixime ever used for viral infections?

A: No. Official documents explicitly state that Cefixime is an antibacterial drug that is used only to treat bacterial infections. It is noted that it does not work for viral infections such as the common cold or the flu.

Q: Is Cefixime 100 Mg/5ml a broad-spectrum or narrow-spectrum antibiotic?

A: Cefixime is classified by authoritative sources as a broad-spectrum third-generation cephalosporin antibiotic. This means it is generally active against a wide variety of both Gram-positive and Gram-negative bacteria.

Q: Are there any known interactions between Cefixime and vitamins or supplements?

A: Regulatory information does not generally detail formal interactions with standard vitamins or supplements. However, studies of its interactions have noted a potential for reduced Cefixime concentrations when used with high-dose salicylates (a class of drugs that includes aspirin).

Q: Can patients with a history of seizures use Cefixime?

A: Seizure disorders are listed as a disease interaction where caution is recommended. Although seizures have been noted in postmarketing reports, regulatory information specifies that dose adjustments are required for patients with severe kidney impairment, which is a main risk factor for neurotoxicity with some antibiotics.

Q: Does Cefixime interact with any vaccines?

A: Yes. Co-administration with live bacterial vaccines, such as the oral Typhoid and Cholera vaccines, is not recommended. This is because the antibacterial action of Cefixime may reduce the vaccine's intended efficacy and immune response.

Q: How long after using Cefixime can side effects appear?

A: Most common side effects, such as diarrhea, may occur while the medication is being used. However, official safety documentation notes that some serious adverse reactions, particularly Clostridium difficile-Associated Diarrhea (CDAD), have been reported to occur even months after the treatment has been completed.

Q: Is it true that Cefixime is generally only used for specific types of bacteria?

A: Although Cefixime is a broad-spectrum agent, its use is officially indicated only for infections caused by specific, susceptible microorganisms listed in the official documents. It is documented as being ineffective against certain bacteria, such as Staphylococcus aureus and Pseudomonas species.

Q: Is a bitter or chalky taste normal with the liquid Cefixime?

A: Yes, Cefixime itself is known to have a naturally bitter taste. The liquid formulation typically includes various flavors and sweeteners to help mask this taste, but the inherent bitterness is considered a property of the medicine, not a side effect.

Q: How does Cefixime affect the intestinal flora?

A: Studies examining the impact of Cefixime on the normal intestinal flora found that it can lead to a decrease in the numbers of certain bacteria, such as E. coli and streptococci. At the same time, it can allow other bacteria, like enterococci, to increase in number, leading to an alteration in the normal gut balance.

Q: Are there known drug-drug interactions involving Cefixime and gout medications?

A: Yes. Official interaction information documents that Probenecid, a medication sometimes used to treat gout, can affect the amount of Cefixime in the body. Probenecid reduces Cefixime's elimination by the kidneys, which results in elevated concentrations of Cefixime in the plasma.

Q: Why is Cefixime sometimes referred to as a 'third-generation' drug?

A: Cefixime is classified as a 'third-generation' cephalosporin because of its specific chemical structure and its antimicrobial characteristics. This designation indicates that it has enhanced stability against certain bacterial defense mechanisms, such as beta-lactamase enzymes, compared to older generations.

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How should Cefixime 100 Mg/5ml be stored and disposed of?

Storage and Disposal Requirements for Cefixime 100 mg/5 mL Oral Suspension

Unreconstituted dry powder must be stored at room temperature, typically below 30 C, and protected from heat, moisture, and light. The reconstituted liquid suspension must not be frozen and is stable for a limited time.

Stability and Handling

The reconstituted suspension has a limited shelf life of 7 to 14 days from preparation, depending on the storage temperature (room temperature or refrigerated) and specific product labeling. The container must be kept tightly closed and shaken well before each use.

Disposal

Any unused portion of the liquid suspension must be discarded after the specified stability period. All forms of the medicine must be stored out of the reach of children. Unused or expired product should be disposed of according to local pharmaceutical waste regulations.

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

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