Comparative Pharmacology
Head-to-head clinical analysis: AVYCAZ versus CEFOXITIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AVYCAZ versus CEFOXITIN.
AVYCAZ vs CEFOXITIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
AVYCAZ is a combination of ceftazidime, a cephalosporin beta-lactam antibiotic, and avibactam, a non-beta-lactam beta-lactamase inhibitor. Ceftazidime inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), leading to cell lysis. Avibactam protects ceftazidime from degradation by certain beta-lactamases, including Ambler class A, class C, and some class D enzymes.
Cefoxitin is a cephamycin antibiotic that inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), particularly PBP-1 and PBP-3, thereby inhibiting the final transpeptidation step of peptidoglycan synthesis. This leads to cell lysis and death. It is resistant to beta-lactamases produced by many Gram-negative and Gram-positive bacteria.
1 vial (ceftazidime 2g and avibactam 0.5g) IV over 2 hours every 8 hours.
1-2 g IV every 6-8 hours; maximum 12 g/day.
None Documented
None Documented
Clinical Note
moderateCefoxitin + Probenecid
"The serum concentration of Probenecid can be increased when it is combined with Cefoxitin."
Clinical Note
moderateCefoxitin + Picosulfuric acid
"The therapeutic efficacy of Picosulfuric acid can be decreased when used in combination with Cefoxitin."
Clinical Note
moderateWarfarin + Cefoxitin
"Warfarin may increase the anticoagulant activities of Cefoxitin."
Clinical Note
moderatePhenprocoumon + Cefoxitin
Ceftazidime: ~2.8 hours; avibactam: ~2.7 hours. Extended in renal impairment (e.g., CrCl <50 mL/min requires dose adjustment).
Terminal elimination half-life is approximately 0.7–1.1 hours (mean 0.8 h) in adults with normal renal function, extending to 5–10 hours in severe renal impairment (CrCl <10 mL/min).
Ceftazidime: primarily renal (80-90% unchanged); avibactam: primarily renal (85-95% unchanged). Fecal excretion <1%.
Renal excretion of unchanged drug accounts for approximately 85% of elimination; biliary excretion is minimal (<1%); fecal elimination is negligible.
Category C
Category A/B
Cephalosporin Antibiotic
Cephalosporin Antibiotic
"Phenprocoumon may increase the anticoagulant activities of Cefoxitin."