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## Tabgenixim
### Overview
Tabgenixim is a brand name for cefixime, a third-generation cephalosporin antibiotic. It is administered orally and works by inhibiting bacterial cell wall synthesis.
### Primary Indications
* **Uncomplicated urinary tract infections (UTIs)** caused by susceptible strains of *Escherichia coli*, *Proteus mirabilis*, *Klebsiella pneumoniae*, or *Streptococcus pneumoniae*.
* **Otitis media** (middle ear infection) caused by susceptible strains of *Haemophilus influenzae*, *Moraxella catarrhalis*, or *Streptococcus pyogenes*.
* **Pharyngitis and tonsillitis** caused by susceptible strains of *Streptococcus pyogenes*.
* **Acute bronchitis and acute exacerbations of chronic bronchitis** caused by susceptible strains of *Haemophilus influenzae*, *Moraxella catarrhalis*, or *Streptococcus pneumoniae*.
### Adult Dosing
* **Uncomplicated UTIs, Otitis Media, Pharyngitis/Tonsillitis, Bronchitis:** 400 mg once daily or 200 mg every 12 hours.
* Maximum daily dose: 400 mg.
### Pediatric Dosing
* **Otitis media, pharyngitis/tonsillitis:** 8 mg/kg once daily or 4 mg/kg every 12 hours.
* Maximum daily dose: 400 mg.
* **Other indications:** Dosing guidelines vary and may depend on local protocols. Consult pediatric-specific guidelines.
### Dose Adjustments
* **Renal Impairment:**
* If creatinine clearance (CrCl) is > 60 mL/min: No dose adjustment needed.
* If CrCl is 21-60 mL/min: 400 mg once daily or 200 mg every 12 hours.
* If CrCl is < 20 mL/min: 200 mg once daily or 100 mg every 12 hours.
* For patients on hemodialysis: Dosing may require adjustment based on the dialysis protocol, often lower doses or less frequent administration.
### Contraindications
* Known hypersensitivity to cefixime, other cephalosporins, or any component of the formulation.
* History of immediate and severe reaction (e.g., anaphylaxis) to penicillin or other beta-lactam antibiotics.
### Adverse Effects
* **Common:** Diarrhea, nausea, vomiting, abdominal pain, headache, dizziness.
* **Serious:**
* *Clostridioides difficile*-associated diarrhea (CDAD)
* Hypersensitivity reactions (rash, pruritus, urticaria, angioedema, anaphylaxis)
* Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN)
* Hepatitis, cholestatic jaundice
* Seizures (rare, particularly with high doses or renal impairment)
* Hemolytic anemia
### Key Drug Interactions
* **Warfarin:** May increase the anticoagulant effect of warfarin. Monitor INR closely.
* **Carbamazepine:** Cefixime may increase carbamazepine levels. Monitor carbamazepine levels.
* **Live bacterial vaccines:** Reduced efficacy of live vaccines.
### Monitoring
* Monitor for signs and symptoms of hypersensitivity reactions.
* Assess for and treat diarrhea promptly, considering CDAD.
* Monitor renal function, especially in patients with pre-existing renal impairment or those receiving other nephrotoxic agents.
* Monitor stool for *C. difficile* if diarrhea is prolonged or severe.
### Clinical Pearls
* Administer with or without food.
* Shake oral suspension well before use.
* Discontinue if hypersensitivity reaction occurs.
* Consider alternative therapy if diarrhea develops, especially if severe or persistent.
* Efficacy for *Streptococcus pyogenes* pharyngitis and tonsillitis has not been established. Penicillin is the drug of choice.
* Should not be used for infections caused by organisms not susceptible to cefixime.
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**Disclaimer:** This information is intended for healthcare professionals and does not replace current prescribing information. Always consult the official product monograph, institutional protocols, and peer-reviewed literature for complete and up-to-date guidance before prescribing.
