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# Tabgenixim (Cefixime)
## Overview
Tabgenixim is a brand name for **Cefixime**, a third-generation oral cephalosporin antibiotic. It exerts bactericidal activity by inhibiting bacterial cell wall synthesis via binding to penicillin-binding proteins (PBPs). It carries an extended spectrum compared to first/second-generation cephalosporins, with increased stability against many beta-lactamases.
## Primary Indications
* Uncomplicated urinary tract infections (UTIs)
* Otitis media
* Pharyngitis and tonsillitis
* Acute bronchitis and acute exacerbations of chronic bronchitis
* Uncomplicated gonorrhea (cervical, urethral, or rectal)
## Adult Dosing
* **General bacterial infections:** 400 mg daily, administered either as a single dose or divided into 200 mg every 12 hours.
* **Uncomplicated gonorrhea:** 800 mg as a single oral dose.
## Pediatric Dosing
* **Weight-based:** 8 mg/kg/day, administered as a single daily dose or divided into 4 mg/kg every 12 hours.
* **Maximum:** Do not exceed 400 mg/day.
* *Note: Safety and efficacy have not been established in infants younger than 6 months.*
## Dose Adjustments
* **Renal Impairment:** If CrCl is 21–60 mL/min, administer 75% of the standard dose. If CrCl <20 mL/min (or on hemodialysis), administer 50% of the standard dose.
* **Hepatic Impairment:** No specific dosage adjustments provided by the manufacturer; use with caution.
## Contraindications
* Known hypersensitivity to cefixime or any component of cephalosporin-class antibiotics.
* History of severe, immediate hypersensitivity reactions (e.g., anaphylaxis) to penicillins or other beta-lactam antibiotics.
## Adverse Effects
* **Common:** Diarrhea (most common), abdominal pain, nausea, dyspepsia, flatulence.
* **Serious:** *Clostridioides difficile*-associated diarrhea (CDAD), hypersensitivity reactions (rash, Stevens-Johnson syndrome, toxic epidermal necrolysis), and hematologic abnormalities (leukopenia, thrombocytopenia).
## Key Drug Interactions
* **Anticoagulants:** May enhance the effects of warfarin; monitor INR.
* **Probenecid:** Increases serum concentration of cefixime by inhibiting renal tubular secretion; monitor for toxicity.
* **Live Vaccines:** Antibiotics may diminish the therapeutic effect of the BCG vaccine or Typhoid vaccine.
## Monitoring
* Monitor periodic renal and hepatic function during prolonged therapy.
* Observe for signs of secondary superinfection or severe diarrhea.
* Assess for resolution of initial infection symptoms.
## Clinical Pearls
* Cefixime is generally ineffective against *Staphylococcus aureus*.
* The suspension form and tablet form are not necessarily bioequivalent; verify formulation instructions.
* Diarrhea is dose-dependent and may be significant; patients should maintain adequate hydration.
* Always verify local institutional antibiograms as resistance patterns for *Neisseria gonorrhoeae* and respiratory pathogens vary significantly by region.
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*Disclaimer: This information is for educational purposes only. Clinical guidelines and resistance patterns change frequently. Always verify current prescribing information, dosing calculations, and patient-specific contraindications via institutional protocols or official drug monographs (e.g., Lexicomp, Micromedex) before prescribing or administering medication.*
