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# Tabgenixim (Cefixime)
## Overview
Tabgenixim is a brand name for **Cefixime**, a third-generation cephalosporin antibiotic. It acts by inhibiting bacterial cell wall synthesis through binding to penicillin-binding proteins (PBPs). It is noted for its stability against many beta-lactamases and extended gram-negative spectrum.
## Primary Indications
* Acute Otitis Media (AOM)
* Pharyngitis and Tonsillitis (caused by *S. pyogenes*)
* Uncomplicated Urinary Tract Infections (UTI)
* Uncomplicated Gonorrhea (cervical, urethral, and rectal)
* Acute exacerbation of chronic bronchitis
## Adult Dosing
* **Respiratory/UTI Infections:** 400 mg orally once daily or 200 mg every 12 hours.
* **Uncomplicated Gonorrhea:** 800 mg orally as a single dose (note: guidelines may vary by region regarding dual therapy requirements).
## Pediatric Dosing
* **General infections (Children >6 months):** 8 mg/kg/day orally as a single dose or divided every 12 hours.
* **Maximum Dose:** 400 mg/day.
## Dose Adjustments
* **Renal Impairment:**
* Creatinine Clearance (CrCl) 21–60 mL/min: Reduce dose by 25% (or 300 mg/day).
* CrCl <20 mL/min: Reduce dose by 50% (or 200 mg/day).
* **Hepatic Impairment:** No specific adjustment required.
## Contraindications
* Known hypersensitivity to cefixime, other cephalosporins, or any component of the formulation.
* History of severe anaphylactic reactions to penicillins or other beta-lactams (use with extreme caution or avoid).
## Adverse Effects
* **Common:** Diarrhea (very common), abdominal pain, nausea, dyspepsia, flatulence.
* **Serious:** *Clostridioides difficile*-associated diarrhea, hypersensitivity reactions (rash, urticaria), rare instances of Stevens-Johnson syndrome or toxic epidermal necrolysis.
## Key Drug Interactions
* **Warfarin/Anticoagulants:** May increase the anticoagulant effect (monitor INR).
* **Probenecid:** May increase serum levels of cefixime by inhibiting renal tubular secretion.
## Monitoring
* Monitor for signs of hypersensitivity.
* Assess for resolution of infection symptoms.
* If diarrhea develops, monitor for signs of *C. difficile* infection (unrelenting diarrhea, fever, abdominal pain).
## Clinical Pearls
* **Food:** Can be taken with or without food.
* **Suspension:** Shake the oral suspension well before use.
* **Spectrum:** While it covers many gram-negatives, it has poor activity against *Staphylococcus aureus* (methicillin-susceptible) compared to first-generation cephalosporins and no activity against *Pseudomonas aeruginosa*.
* **Diarrhea:** The high rate of diarrhea is attributed to its formulation; counsel patients that this is common and usually self-limiting.
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**Educational Disclaimer:** This information is for educational purposes only. Clinical practice guidelines vary by region and institution. Always consult the most current official product labeling (FDA/EMA) and local institutional antimicrobial stewardship protocols before prescribing or administering any medication.
