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# Tabgenixim (Cefixime)
## Overview
Tabgenixim is a brand trade name for **Cefixime**, a third-generation cephalosporin antibiotic. It exhibits broad-spectrum activity against Gram-negative organisms and limited activity against Gram-positive organisms. It is stable against many beta-lactamases.
## Primary Indications
* Uncomplicated urinary tract infections (UTIs)
* Otitis media
* Pharyngitis and tonsillitis
* Gonococcal infections (uncomplicated gonorrhea of the cervix, urethra, or rectum)
* Acute bronchitis or acute exacerbation of chronic bronchitis
## Adult Dosing
* **General 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.
* *Note: Duration of therapy typically ranges from 5 to 14 days depending on the severity and site of infection.*
## Pediatric Dosing
* **General Infections (>6 months of age):** 8 mg/kg/day, administered as a single dose or divided into 4 mg/kg every 12 hours.
* **Maximum Dose:** Do not exceed 400 mg per day.
* *Note: Safety and efficacy specifically for children under 6 months have not been established.*
## Dose Adjustments
* **Renal Impairment:**
* CrCl 21–60 mL/min: Reduce dose to 75% of the standard dose.
* CrCl <20 mL/min: Reduce dose to 50% of the standard dose.
* **Hepatic Impairment:** No specific adjustment guidelines exist; use with caution.
## Contraindications
* Known hypersensitivity to cefixime or other cephalosporin-class antibiotics.
* History of severe allergic reactions (e.g., anaphylaxis) to penicillins or other beta-lactams (due to potential for cross-reactivity).
## Adverse Effects
* **Common:** Diarrhea (most frequent), abdominal pain, nausea, dyspepsia, and flatulence.
* **Serious:** *Clostridioides difficile*-associated diarrhea (CDAD), hypersensitivity reactions (rash, urticaria), and secondary fungal infections.
## Key Drug Interactions
* **Anticoagulants:** May enhance the anticoagulant effect of warfarin (monitor INR).
* **Probenecid:** Increases serum concentrations and toxicity risk of cefixime by reducing renal excretion.
* **Live Vaccines:** Antibiotics may diminish the therapeutic effect of the BCG vaccine or typhoid vaccine.
## Monitoring
* Monitor for signs of anaphylaxis during the first dose.
* Assess for persistent diarrhea or signs of colitis (*C. difficile*).
* Monitor renal function in patients with pre-existing impairment or those on high-dose/long-term therapy.
## Clinical Pearls
* **Food interaction:** Cefixime can be taken with or without food.
* **Suspension:** Oral suspension should be shaken well before use. Once reconstituted, discard any unused portion after 14 days.
* **Spectrum:** It lacks reliable activity against *Staphylococcus aureus* and is generally not the drug of choice for suspected MRSA.
* **Dosing protocol:** Specific institutional guidelines for bacterial resistance patterns may supersede standard dosing regimens for off-label use.
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**Disclaimer:** This information is intended for educational purposes only. Always verify current prescribing information, institutional guidelines, and drug-interaction databases before clinical application, as dosing protocols and safety warnings are subject to change.
