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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 organisms and selected Gram-positive bacteria, though it lacks reliable activity against *Staphylococcus aureus* or *Enterococcus* species.
## Primary Indications
* Uncomplicated urinary tract infections (UTIs)
* Otitis media
* Pharyngitis and tonsillitis
* Acute bronchitis and acute exacerbations of chronic bronchitis
* Uncomplicated gonorrhea (cervical/urethral/rectal)
## Adult Dosing
* **General infections:** 400 mg daily, administered as a single dose or in two divided doses (200 mg every 12 hours).
* **Uncomplicated gonorrhea:** 800 mg as a single oral dose.
## Pediatric Dosing
Patients > 50 kg should follow adult dosing. For children < 50 kg:
* **General infections:** 8 mg/kg/day, administered as a single dose or in two divided doses (4 mg/kg every 12 hours).
* **Otitis media:** 8 mg/kg/day once daily or divided every 12 hours.
## Dose Adjustments
* **Renal Impairment:** If CrCl is 21–60 mL/min, administer 75% of the standard dose. If CrCl < 20 mL/min, administer 50% of the standard dose.
* **Hepatic Impairment:** No specific adjustment guidelines provided by the manufacturer; use with caution.
## Contraindications
* Known hypersensitivity to cefixime or any cephalosporin antibiotic.
* History of severe allergic reactions (e.g., anaphylaxis) to penicillins or other beta-lactams (risk of cross-reactivity exists).
## Adverse Effects
* **Gastrointestinal:** Diarrhea (very common), nausea, abdominal pain, and dyspepsia.
* **Neurological:** Headache, dizziness.
* **Rare/Serious:** *Clostridioides difficile*-associated diarrhea, Stevens-Johnson syndrome, toxic epidermal necrolysis, and neutropenia.
## Key Drug Interactions
* **Warfarin:** Cefixime may enhance the anticoagulant effect; monitor INR closely.
* **Probenecid:** Increases serum concentrations of cefixime by reducing renal tubular secretion.
* **Vaccines:** May decrease the efficacy of the BCG vaccine or typhoid vaccine; avoid concomitant administration.
## Monitoring
* Monitor for signs of hypersensitivity (e.g., rash, pruritus).
* If treatment is prolonged, monitor renal and hepatic function.
* Assess for persistent diarrhea to rule out *C. difficile* infection.
## Clinical Pearls
* **Administration:** Cefixime may be taken with or without food.
* **Suspension:** Oral suspension should be stored at room temperature and discarded after 14 days. Do not refrigerate.
* **Activity:** It is not effective against MRSA or *Pseudomonas aeruginosa*.
* **Efficacy:** The 400 mg dose is often more effective in a single dose for compliance, but split-dose administration may be better tolerated if gastrointestinal side effects occur.
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**Educational Disclaimer:** This information is for educational purposes only. Clinical practice guidelines vary by region and institution. Always verify specific dosing, safety, and contraindications against the current manufacturer’s prescribing information or an institutional pharmacy clinical database before prescribing or administering medication.
