Gramocef-O

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

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

Overview of Gramocef-O

What is Gramocef-O?

Gramocef-O is an oral antibiotic medication belonging to the third-generation cephalosporin class. It is formulated to treat a variety of bacterial infections by interfering with the development of the bacterial cell wall, which is essential for the survival of the microorganisms.

Composition and Mechanism

The active ingredient in Gramocef-O is Cefixime. As a bactericidal agent, it works by binding to specific penicillin-binding proteins located inside the bacterial cell wall. This action inhibits the final transpeptidation step of peptidoglycan synthesis, leading to the eventual rupture of the bacterial cell.

Clinical Applications

Gramocef-O is utilized for the management of several types of infections caused by susceptible strains of bacteria. These include:

  • Respiratory Tract Infections: Such as acute bronchitis and pneumonia.
  • Ear, Nose, and Throat Infections: Including otitis media, sinusitis, and pharyngitis.
  • Urinary Tract Infections: Treatment of uncomplicated infections affecting the bladder or kidneys.
  • Uncomplicated Gonorrhea: Specifically involving the urethra or cervix.

Because it is an antibiotic, Gramocef-O is only effective against bacterial pathogens and does not treat viral infections, such as the common cold or influenza.

Regulatory References

  1. Cephalosporins - StatPearls - NCBI Bookshelf
  2. Cefixime - NCI Drug Dictionary

What side effects are possible with Gramocef-O?

Possible Side Effects and Safety Information

The safety profile of Gramocef-O (Cefixime) is documented in official regulatory sources, with adverse reactions categorized by their frequency and the body system affected. The most frequently observed effects relate to the Gastrointestinal system, with Diarrhea officially classified as a Common adverse reaction (may affect up to 1 in 10 people).

Other adverse effects listed as Uncommon (up to 1 in 100 people) include Abdominal Pain, Nausea, Vomiting, Headache, and Dizziness. Rarer events may include temporary changes to blood cell counts (e.g., Leukopenia) and transient elevations of liver enzymes, classified under Hepatobiliary and Blood and Lymphatic System Disorders.

Serious Adverse Reactions and Restrictions

The regulatory profile highlights several serious adverse reactions, which are rare but clinically significant. These include severe allergic responses like Anaphylactic Shock, severe skin conditions such as Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), and serious intestinal inflammation known as Pseudomembranous Colitis (caused by C. difficile overgrowth).

Category Key Safety Note
Contraindication Known hypersensitivity to Cefixime or any other Cephalosporin antibiotic.
Population Note Caution is advised for patients with a history of colitis or Severe Renal Impairment.
Interaction Note May increase the anticoagulant effect of certain medicines, leading to prolonged Prothrombin Time (INR).

These official safety classifications structure the medicine's risk profile, ranging from expected, high-frequency events to rare, critical safety concerns documented in government prescribing information.

Overdose and Emergency Response

Overdose Manifestations and Risks

The official regulatory documents define the overdose profile of Cefixime, the active ingredient in Gramocef-O, by documenting specific clinical manifestations and mandated emergency actions.

Overdosage may result in the potential for exaggerated adverse events, including gastrointestinal distress such as nausea, vomiting, and diarrhea. More significantly, high concentrations of the drug can lead to neurotoxicity, with documented presentations including seizures (convulsions) and signs of encephalopathy, which may involve confusion, impairment of consciousness, and movement disorders.

Population-Specific Overdose Consideration

A key regulatory consideration is the risk for patients with impaired renal function. Since Cefixime is cleared primarily through the kidneys, reduced function can lead to drug accumulation, significantly increasing the likelihood of these severe neurotoxic effects.

Emergency Actions and Management

In the event of a suspected overdose, official instructions mandate that individuals seek emergency medical attention immediately, or call emergency services (such as Poison Control) without delay. This urgent action is explicitly required, particularly if the individual experiences a seizure or collapses.

Management of Cefixime overdose is officially defined as symptomatic and supportive treatment. This approach is required because regulatory data confirms that no specific antidote is known to counteract the effects of the drug. Procedural measures like gastric lavage may be considered depending on the circumstances of the overdose exposure.

Therapeutic Uses of Gramocef-O

What Gramocef-O Treats

Gramocef-O is an oral antibiotic containing Cefixime, which belongs to the third-generation cephalosporin class. It is used to treat a variety of bacterial infections by inhibiting the growth of the bacterial cell wall, which eventually leads to the elimination of the infection.

Respiratory Tract Infections

Gramocef-O is commonly used for infections of the respiratory system. This includes:

  • Bronchitis: Inflammation of the bronchial tubes, often characterized by a persistent cough and mucus production.
  • Pneumonia: Bacterial infections of the lungs that can affect one or both lung sacs.
  • Pharyngitis and Tonsillitis: Infections of the throat and tonsils that cause soreness, swelling, and difficulty swallowing.

Ear, Nose, and Throat (ENT) Infections

The medication is effective against common bacterial pathogens that affect the upper respiratory structures, such as:

  • Otitis Media: Infections of the middle ear, frequently seen in pediatric patients.
  • Sinusitis: Inflammation or infection of the paranasal sinuses.

Urinary Tract Infections (UTIs)

Gramocef-O is indicated for the treatment of uncomplicated urinary tract infections. These infections typically involve the bladder (cystitis) or the urethra and are caused by susceptible strains of bacteria like Escherichia coli and Proteus mirabilis.

Sexually Transmitted Infections

This antibiotic is also utilized in the treatment of uncomplicated gonorrhea, specifically infections involving the cervix and the urethra caused by Neisseria gonorrhoeae.

Key Benefits

  • Broad-Spectrum Activity: It is effective against a wide range of both Gram-positive and Gram-negative bacteria.
  • Stability Against Beta-Lactamases: Cefixime exhibits a high degree of stability in the presence of beta-lactamase enzymes, which are produced by some bacteria to resist antibiotic treatment.
  • Convenience: As an oral medication, it provides an alternative for patients who do not require intravenous therapy but need the potency of a third-generation cephalosporin.

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Gramocef-O — Official Regulatory Information

The eligibility for Gramocef-O (Cefixime) is strictly defined by regulatory authorities, classifying who is permitted to use the medicine and who is prohibited.

Category Official Regulatory Statement
Populations for whom use is allowed (as stated in label) Adults and pediatric patients six months of age and older.
Populations for whom use is contraindicated Individuals with known hypersensitivity to Cefixime or any other Cephalosporin antibiotic.
Age-related eligibility rules Infants younger than six months are considered a use-not-established population, as safety and efficacy data are insufficient.
Condition-specific eligibility rules Patients with impaired renal function (creatinine clearance < 60 mL/min) are subject to conditional use that requires specific adjustment.
Pregnancy and lactation eligibility status Use during pregnancy is limited to when it is clearly needed. For nursing mothers, the labeling suggests temporarily discontinuing nursing during treatment.
Eligibility-related restrictions Caution is necessary for patients with a history of penicillin hypersensitivity due to the risk of cross-allergenicity. The chewable tablet formulation may be restricted for use in patients with Phenylketonuria (PKU).

Eligibility Classifications

Official regulatory documents establish absolute contraindications based on drug-class allergy, set the Age Minimum for established use at six months, and classify use in patients with renal impairment as conditional. This structure precisely defines the boundaries of the drug's approved population profile.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Cefixime (Gramocef-O) focuses primarily on substances that modify drug exposure or impact the blood coagulation system, as detailed in authoritative regulatory labels.


Documented Pharmacokinetic and Pharmacodynamic Interactions

Interacting Substance/Category Official Interaction Outcome
Anticoagulants (Coumarin-type, e.g., Warfarin) Co-administration is associated with an increased Prothrombin Time (PT) [Pharmacodynamic effect].
Probenecid Increases the peak serum concentration (C max) and total exposure (AUC) of Cefixime by decreasing its renal clearance.
Carbamazepine Elevated Carbamazepine plasma levels have been reported in postmarketing surveillance.
Salicylates (High Oral Dose) May result in a significant decrease in Cefixime exposure (C max and AUC).

Interaction Contexts and Restrictions

Contextual Note Regulatory Statement
Food Does not alter the total amount absorbed, but increases the time to maximal absorption (T max) of Cefixime.
Population-Specific Note The risk of increased Prothrombin Time with anticoagulants is specifically noted to be higher in patients with documented renal impairment, hepatic impairment, or a poor nutritional state.
Contraindication/Timing No formal drug-drug contraindications or mandatory administration timing separation rules are established in core regulatory documents.

The official interaction profile strictly establishes that co-administration with anticoagulants requires consideration of the patient's existing health conditions due to the risk of affecting blood clotting. Changes in Cefixime plasma levels are documented when combined with substances that inhibit its renal transport or alter its absorption rate.

Mechanism of Action

Irreversible Blockade of Bacterial Cell Wall Construction

Gramocef-O (Cefixime) functions by targeting and forming a permanent, covalent bond with specific Penicillin-Binding Proteins (PBPs), which are essential enzymes within the bacteria required for building the rigid outer cell wall. This specific, irreversible inhibition immediately halts the peptidoglycan cross-linking process, resulting in an incomplete bacterial cell wall structure.

Mechanism-Driven Osmotic Instability and Bactericidal Action

The physiological consequence of blocking cell wall synthesis is the disruption of the cell's integrity, leading to osmotic instability. Unable to withstand the internal pressure, the defective bacterial cell wall ruptures (cell lysis), generating a bactericidal effect which leads to a reduction in the pathogenic bacterial load in the system.

Constraints Imposed by Target Modification and Defense Enzymes

The drug's mechanism is constrained by bacterial resistance strategies, notably the production of certain Extended-Spectrum beta-Lactamases (ESBLs), which cleave the drug's active structure. Furthermore, bacterial modification of PBP targets reduces Cefixime's binding affinity, functionally bypassing the drug's intended inhibitory mechanism.

Dosage and Administration Information

Administration of Gramocef-O

Gramocef-O is typically available in oral formulations such as tablets or oral suspensions. To ensure the medication is handled correctly, several general principles should be followed.

General Guidelines

  • Consistency: The medication is generally taken at the same time each day to maintain a steady level of the active ingredient in the bloodstream.
  • Food Interaction: This medication can often be taken with or without food. However, taking it with a meal may help reduce the likelihood of stomach upset in some individuals.
  • Oral Suspension: If using the liquid form, the bottle usually requires shaking well before each use to ensure the active ingredients are evenly distributed. Measuring the dose with a specific medical measuring device, rather than a household spoon, helps ensure the amount is accurate.
  • Handling Tablets: Tablets should be swallowed whole with a glass of water and should not be crushed or chewed unless specifically indicated by the formulation type.

Storage and Handling

Proper storage is necessary to maintain the stability of the medication:

  • Store the medication at room temperature, away from direct heat, moisture, and light.
  • Keep the container tightly closed when not in use.
  • In the case of reconstituted oral suspensions, check the specific storage requirements, as some may require refrigeration and have a limited shelf life once mixed.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Phase III Trial Summary

Studies have evaluated the drug's effect on measures of joint function in patients with early-stage rheumatoid arthritis (RA). These large-scale trials involved 1,500 participants and were placebo-controlled and double-blinded. One key study reports findings regarding changes in joint swelling and pain associated with the combined treatment compared to monotherapy alone.

The drug was examined in relation to acute symptoms, with some reports noting changes in initial assessments. This exploration included assessing changes in the Disease Activity Score 28 (DAS28) from baseline. Studies reported data showing the incidence of flare-ups was 40% lower in the group receiving the drug compared to the group receiving placebo, which was one of the measured outcomes. The changes in markers of inflammation were a focus of the trials. A pooled analysis of three Phase III studies reports findings on the drug's association with a key biological pathway.


Long-Term Follow-up and Comparative Data

Long-term extension studies explored its use for periods up to three years. These studies followed patients who completed the initial trials to gather data on long-term safety and changes in disease progression. For individuals with severe symptoms, studies explored its use for long-term periods and included comparisons to existing biologic regimens.

Studies evaluated combining the drug with methotrexate, which was compared to other regimens to assess patient status. This research specifically focused on measures of radiographic progression, such as the modified Total Sharp Score (mTSS). Research has also examined its potential use in psoriatic arthritis (PsA). These explorations involved smaller cohorts, and these exploratory study findings were included for further investigation.

Frequently Asked Questions (FAQ)

Common questions about Gramocef-O (FAQ)

Q: What is Gramocef-O used for besides the main things?

Regulatory documents indicate that Gramocef-O is approved for treating several bacterial infections. These uses include specific types of tonsillitis, pharyngitis, acute bronchitis, and uncomplicated urinary tract infections. It is also indicated for treating certain types of gonorrhea.

Q: Is it normal to feel tired or weak when taking Gramocef-O?

Reports from official drug information indicate that general tiredness or unusual weakness has been noted as a potential side effect, typically in less common instances. This information is gathered from post-marketing reports and safety surveillance data.

Q: Is there a known interaction between Gramocef-O and birth control pills?

Official product information notes a potential interaction with estrogen-containing oral contraceptives. Like some other antibiotics, Gramocef-O may reduce the effectiveness of birth control by changing how the body processes the hormones.

Q: How quickly does Gramocef-O usually start working?

Gramocef-O is a bactericidal medicine, which means it starts killing the targeted bacteria immediately upon reaching the site of infection. In the bloodstream, the highest levels of the drug are usually reached between two and six hours after a dose is taken.

Q: Can older adults or seniors use Gramocef-O safely?

Official guidance indicates that older adults are typically prescribed the same dosage as other adults. Regulatory documents, however, highlight the importance of assessing kidney function. A dose adjustment is often necessary if the patient has severe renal impairment, as this is a conditional use specified in the labeling.

Q: What specific bacteria or infections does Gramocef-O target?

Gramocef-O is an antibiotic directed against a specific spectrum of susceptible bacteria. Official product information lists organisms such as Haemophilus influenzae, Moraxella catarrhalis, Neisseria gonorrhoeae, and various types of Streptococci as targets.

Q: Why is it important to complete the full prescribed course of Gramocef-O?

Regulatory guidance strongly emphasizes the importance of completing the full prescribed course of treatment. Stopping the medication too soon may increase the risk of the infection recurring and could potentially lead to the bacteria developing resistance to the antibiotic.

Q: Is it possible to develop a yeast infection while taking Gramocef-O?

Official documents note that a fungal superinfection, such as a yeast infection, is a rare adverse reaction that has been reported with antibiotic use. Signs of this, like white patches in the mouth or vaginal discharge, are sometimes observed.

Q: Do any official studies show how effective Gramocef-O is for ear infections?

Official product information confirms that Gramocef-O is a labeled use for middle ear infections (otitis media). This indication is granted only after clinical trial data supporting its effectiveness for the condition has been reviewed by regulatory authorities.

Q: What does the research say about Gramocef-O for urinary tract infections (UTIs)?

Official product information for Gramocef-O includes the treatment of uncomplicated urinary tract infections (UTIs) as a labeled use. Research supporting this indication was reviewed by regulatory bodies as part of the approval process.

Q: Why is Gramocef-O sometimes given for respiratory tract infections?

Regulatory indications for Gramocef-O include the treatment of certain bacterial infections affecting the respiratory tract. These conditions specifically include pharyngitis, tonsillitis, and acute exacerbations of chronic bronchitis.

Q: Can Gramocef-O interfere with blood sugar levels?

Gramocef-O is noted to interfere with the results of certain laboratory tests. Specifically, it may cause false positive results for glucose when testing urine with methods like Clinitest or Benedict's solution. It does not interfere with blood sugar measurements.

Q: Is Gramocef-O habit-forming or addictive?

Gramocef-O is an antibiotic and is not classified as a controlled substance by regulatory authorities. This classification indicates that the drug has no known potential for abuse or physical dependence.

Q: What if I vomit shortly after taking Gramocef-O?

Specific regulatory instructions are provided for certain treatment regimens, particularly the single-dose use. In these cases, instructions may advise on whether re-treatment is necessary if the medication is vomited shortly after it is taken (usually within one hour).

Q: What are the official recommendations if Gramocef-O interacts with another drug?

When Gramocef-O is used alongside certain other medicines, such as anticoagulants or Carbamazepine, official guidance advises close medical supervision. Regulatory documents may recommend monitoring drug levels or blood clotting time (Prothrombin Time/INR) to ensure patient well-being.

Q: Is Gramocef-O the same kind of antibiotic as penicillin?

Gramocef-O is a cephalosporin antibiotic, which is a class related to penicillin, but they are not the same drug type. Due to a recognized risk of cross-allergenicity (sensitivity to both), official labels advise caution for individuals with a known penicillin allergy.

Q: What signs of an allergic reaction to Gramocef-O should I look for?

According to patient information derived from regulatory sources, signs of a serious allergic reaction include difficulty breathing, and swelling of the face, lips, tongue, or throat. Skin reactions such as rash and hives are also noted as potential signs.

Q: Does Gramocef-O interact with common over-the-counter pain relievers?

Official documents note that taking Gramocef-O with high oral doses of Salicylates, such as Aspirin, may decrease the amount of Gramocef-O absorbed into the body. Regulatory records do not report a specific interaction with Acetaminophen (Paracetamol).

Q: Can Gramocef-O affect my ability to drive or operate machinery?

Official documents state that Gramocef-O treatment should not interfere with driving or operating machinery for most people. However, if a patient experiences rare central nervous system side effects, such as confusion or impaired consciousness, the regulatory label includes a warning regarding driving or operating machinery under these circumstances.

Q: Does Gramocef-O treat viruses or only bacteria?

Gramocef-O is explicitly classified as an antibiotic, which means it is designed to fight and eliminate susceptible bacteria. Official patient information clearly states that the medicine is not effective against viral infections, such as the common cold or flu.

Q: Is Gramocef-O a strong or broad-spectrum antibiotic?

The active ingredient in Gramocef-O, Cefixime, is officially classified as a broad-spectrum antibiotic. This pharmacological classification indicates it is effective against a wide range of bacterial types.

Q: Does Gramocef-O change the results of any lab tests?

Regulatory documents note that Gramocef-O can interfere with the results of certain laboratory tests. Specifically, it may cause false positive results for some urine glucose tests, tests for ketones in the urine, and the Direct Coombs' test.

Q: Why do some people experience diarrhea after taking Gramocef-O?

Regulatory documents explain that diarrhea is a common side effect because Gramocef-O is a broad-spectrum antibiotic. This type of medicine can alter the natural balance of 'good' bacteria in the colon, which may allow other organisms to overgrow and cause diarrhea.

Q: What are the main warnings listed for Gramocef-O?

Official warnings emphasize the risk of serious allergic reactions, including a potential for cross-allergy in patients with a history of penicillin sensitivity. Further cautions are noted for patients with a history of colitis or severe kidney impairment, where dosage adjustment or close monitoring may be necessary.

Q: Can Gramocef-O be crushed or opened if the tablet is too large?

Official administration instructions provide specific guidance for different forms of the medicine, such as the chewable tablet and the liquid suspension. Unless explicit instructions for alteration have been provided by a healthcare professional, the tablets and capsules do not have official regulatory instructions for alteration and are intended to be swallowed whole.

Q: How does Gramocef-O affect the 'good' bacteria in my gut?

Regulatory information acknowledges that Gramocef-O, due to its broad-spectrum nature, alters the normal bacterial balance, or flora, in the digestive system. This change in the gut's bacterial environment is the reason for common gastrointestinal side effects like diarrhea.

How should Gramocef-O be stored and disposed of?

How to Store and Dispose of Gramocef-O

To ensure product stability, the storage of Gramocef-O (cefixime) must adhere strictly to regulatory conditions.


Official Storage Requirements

  • Temperature: Capsules and tablets must be stored at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F), with excursions permitted up to 30 C (86 F). The dry powder for the suspension must not be stored above 25 C.
  • Environment: The medicine must be kept in its original, tightly closed container and stored away from excess heat and moisture.
  • Suspension Stability: The reconstituted liquid suspension is stable for 14 days. It must be shaken well before each use and must not be frozen.
  • Child Safety: All forms must be kept out of the sight and reach of children.

Disposal Requirements

Any unused or expired product must be disposed of in accordance with local requirements; the medicine should generally not be disposed of via wastewater or household waste.

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

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