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# Tabgenixim (Cefixime)
## Overview
Tabgenixim is a brand name for **Cefixime**, a third-generation cephalosporin antibiotic. It possesses broad-spectrum activity against many Gram-negative bacteria (including *Haemophilus influenzae* and *Moraxella catarrhalis*) and some Gram-positive activity, though it is generally less effective against *Staphylococcus aureus* than first-generation cephalosporins.
## 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 Infections:** 400 mg orally once daily or 200 mg every 12 hours.
* **Uncomplicated Gonorrhea:** 400 mg orally as a single dose.
* **Maximum Dose:** 400 mg per day.
## Pediatric Dosing
* **Weight-based:** 8 mg/kg/day orally as a single dose or divided into two doses (4 mg/kg every 12 hours).
* **Otitis Media:** 8 mg/kg/day once daily or divided BID.
* **Maximum Dose:** Do not exceed 400 mg/day.
## Dose Adjustments
* **Renal Impairment:** If CrCl < 60 mL/min, reduce dose or increase dosing interval.
* **CrCl 21–60 mL/min:** Administer 75% of the standard dose.
* **CrCl < 20 mL/min (or hemodialysis):** Administer 50% of the standard dose.
* **Hepatic Impairment:** No specific adjustment required.
## Contraindications
* Known hypersensitivity to cefixime or other cephalosporins.
* History of severe allergic reaction (e.g., anaphylaxis) to penicillins or other beta-lactams (cross-reactivity is possible).
## Adverse Effects
* **Common:** Diarrhea (most frequent), abdominal pain, nausea, dyspepsia.
* **Serious:** *Clostridioides difficile*-associated diarrhea, hypersensitivity reactions (rash, urticaria, serum sickness), and rare instances of Stevens-Johnson syndrome or toxic epidermal necrolysis.
## Key Drug Interactions
* **Anticoagulants:** May enhance the effects of warfarin (monitor INR).
* **Probenecid:** May elevate cefixime serum concentrations by inhibiting renal tubular secretion.
* **Live Vaccines:** Antibiotics may decrease the therapeutic effect of the BCG vaccine or Typhoid vaccine.
## Monitoring
* Monitor for signs of hypersensitivity.
* If treatment is prolonged, monitor renal and hepatic function.
* Observe for persistent/bloody diarrhea (potential *C. difficile* infection).
## Clinical Pearls
* **Formulation:** Cefixime is available as tablets and oral suspension. Ensure specific weight-based calculations are verified for pediatric patients.
* **Bioavailability:** The bioavailability of the tablet and suspension forms may vary; consult local formulary if switching between forms.
* **Resistance:** Cefixime is not indicated for the treatment of *Staphylococcus aureus* infections.
* **Susceptibility:** Always consider local antibiograms; empiric use should be based on local resistance patterns.
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**Disclaimer:** This information is for educational purposes only. Always consult the most recent product monograph, clinical guidelines, or institutional pharmacy protocols before prescribing or administering medication. Confirm accuracy through official drug databases (e.g., Lexicomp, Micromedex) or the manufacturer's official labeling.
