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# Tabgenixim (Cefixime)
## Overview
Tabgenixim is a brand name for **Cefixime**, a third-generation oral cephalosporin antibiotic. It exhibits broad-spectrum activity against Gram-negative bacteria (e.g., *Haemophilus influenzae*, *Moraxella catarrhalis*, *Neisseria gonorrhoeae*) and limited activity against Gram-positive organisms (e.g., *Streptococcus pneumoniae*).
## 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 either 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
* **Children > 6 months (weight < 50 kg):** 8 mg/kg/day administered as a single daily dose or in two divided doses of 4 mg/kg.
* **Children > 50 kg or > 12 years:** Use adult dosing (400 mg daily).
## Dose Adjustments
* **Renal Impairment:**
* CrCl 21–60 mL/min: Administer 75% of the standard dose (300 mg daily).
* CrCl < 20 mL/min: Administer 50% of the standard dose (200 mg daily).
* **Hepatic Impairment:** No formal dosage adjustment guidelines; use with caution.
## Contraindications
* Known hypersensitivity to cefixime or other cephalosporins.
* History of severe allergic reactions (e.g., anaphylaxis, Stevens-Johnson syndrome) to any penicillin-class antibiotic.
## Adverse Effects
* **Common:** Diarrhea (frequently dose-dependent), abdominal pain, nausea, dyspepsia, and flatulence.
* **Serious:** *Clostridioides difficile*-associated diarrhea (CDAD), hypersensitivity reactions, seizures (rare, risk increased with renal failure), and elevation in liver enzymes.
## Key Drug Interactions
* **Anticoagulants:** May enhance the anticoagulant effect of Warfarin. Monitor INR closely.
* **Probenecid:** Can increase serum concentrations of cefixime by inhibiting renal excretion.
* **Live Vaccines:** Antibiotics may diminish the efficacy of the BCG vaccine or typhoid vaccine.
## Monitoring
* Monitor for signs of hypersensitivity.
* In patients on long-term therapy, assess renal, hepatic, and hematologic function periodically.
* Monitor for persistent diarrhea, evaluating for *C. difficile* if symptoms are severe.
## Clinical Pearls
* **Administration:** Cefixime may be taken with or without food.
* **Absorption:** Oral suspension typically has higher bioavailability than tablets; consider this if switching formulations.
* **Spectrum:** Note that cefixime has poor activity against *Staphylococcus aureus* and *Enterococcus* species.
* **Local Protocols:** Treatment for gonorrhea frequently requires combination therapy (e.g., with ceftriaxone or doxycycline) based on local resistance patterns and current CDC/regional guidelines.
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**Disclaimer:** This information is for educational purposes only. Clinical practice guidelines and local resistance patterns evolve frequently. Always verify current prescribing information, institutional protocols, and patient-specific factors before administering medication.
