Introduction
Cefpodoxime is an oral third generation cephalosporin antibiotic with effectiveness against most Gram positive and Gram negative bacteria. Commonly used to treat acute otitis media, pharyngitis, and sinusitis, cefpodoxime proxetil is a prodrug which is absorbed and de-esterified by the intestinal mucosa to Cefpodoxime.
Uses
Cefpodoxime is a third-generation cephalosporin antibiotic used in the treatment of various bacterial infections, including gonorrhea, community acquired pneumonia, and sinusitis.
Indicated for the treatment of patients with mild to moderate infections caused by susceptible strains of the designated microorganisms.
Associated Conditions
Pharmacodynamics
Cefpodoxime is shown to be effective against most Gram positive and Gram negative bacteria, except Pseudomonas aeruginosa, Enterococcus, and Bacteroides fragilis.
Mechanism of Action
Cefpodoxime is active against a wide spectrum of Gram-positive and Gram-negative bacteria. Cefpodoxime is stable in the presence of beta-lactamase enzymes. As a result, many organisms resistant to penicillins and cephalosporins, due to their production of beta-lactamase, may be susceptible to cefpodoxime. Cefpodoxime is inactivated by certain extended spectrum beta-lactamases. The bactericidal activity of cefpodoxime results from its inhibition of cell wall synthesis. The active metabolite of cefpodoxime binds preferentially to penicillin binding protein 3, which inhibits production of peptidoglycan, the primary constituent of bacterial cell walls.
Absorption
Cefpodoxime proxetil is a prodrug that is absorbed from the gastrointestinal tract and de-esterified to its active metabolite, cefpodoxime. Following oral administration of 100 mg of cefpodoxime proxetil to fasting subjects, approximately 50% of the administered cefpodoxime dose was absorbed systemically.
Protein Binding
22 to 33% in serum and from 21 to 29% in plasma.
Route of Elimination
Over the recommended dosing range (100 to 400 mg), approximately 29 to 33% of the administered cefpodoxime dose was excreted unchanged in the urine in 12 hours.
Half Life
2.09 to 2.84 hours
Food Interactions
- Take on an empty stomach. Take at least 1 hour before or 2 hours after meals.
Dosage
- Pharyngitis/tonsillitis: 100 mg 12 hourly, 5 to 10 days
- Acute maxillary sinusitis: 200 mg 12 hourly, 10 day
- Community-acquired pneumonia: 200 mg 12 hourly, 14 days
- Acute bacterial exacerbations of chronic bronchitis: 200 mg 12 hourly, 10 days
- Skin and skin structure: 400 mg 12 hourly, 7 to 14 days
- Uncomplicated urinary tract infection: 100 mg 12 hourly, 7 days
- Uncomplicated gonorrhea: single dose of 200 mg
- Rectal gonococcal infections in women: single dose of 200 mg
- Acute otitis media: 5 mg/kg body weight 12 hourly, 5 days
- Pharyngitis /tonsillitis: 5 mg/kg body weight 12 hourly, 5 to 10 days
- Acute maxillary sinusitis: 5 mg/kg body weight 12 hourly, 10 days
Patients with liver cirrhosis: Cefdox Capsule 100 mg pharmacokinetics in cirrhotic patients are similar to those in healthy subjects. Dose adjustment is not necessary in this population.
