Cephalosporin-probenecid drug interactions

Area of Science:

• Pharmacology
• Infectious Diseases

Background:

• Probenecid is often co-administered with cephalosporins.
• The interaction between probenecid and cephalosporins impacts drug pharmacokinetics.

Purpose of the Study:

• To analyze the effect of probenecid on cephalosporin pharmacokinetics.
• To evaluate the clinical relevance of these pharmacokinetic changes.

Main Methods:

• Review of existing studies on probenecid-cephalosporin interactions.
• Analysis of pharmacokinetic parameters like renal clearance, serum concentrations, and AUC.
• Assessment of drug distribution into various body fluids.

Main Results:

• Probenecid alters cephalosporin pharmacokinetics, increasing peak serum concentrations and AUC by impairing renal clearance.
• Distribution of cephalosporins can be affected, with increased penetration into ocular and CNS fluids reported for some agents.
• Ceforanide, ceftazidime, ceftriaxone, and latamoxef show no significant pharmacokinetic changes with probenecid.
• Probenecid dosage and timing are key factors in the interaction's magnitude.

Conclusions:

• Probenecid significantly impacts the pharmacokinetics of most cephalosporins, though specific agents are unaffected.
• While probenecid enhances cephalosporin concentrations, its necessity for treating gonorrhea, particularly with ceftriaxone, is questionable.
• Further research is needed to determine the clinical relevance of altered cephalosporin distribution.