Comparative Pharmacology
Head-to-head clinical analysis: AVYCAZ versus CEFDINIR.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AVYCAZ versus CEFDINIR.
AVYCAZ vs CEFDINIR
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.
Cefdinir is a third-generation cephalosporin antibiotic that inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs), thereby inhibiting peptidoglycan cross-linking, leading to cell lysis and death.
1 vial (ceftazidime 2g and avibactam 0.5g) IV over 2 hours every 8 hours.
300 mg orally twice daily for 5-10 days, or 600 mg orally once daily for 10 days.
None Documented
None Documented
Clinical Note
moderateCefdinir + Picosulfuric acid
"The therapeutic efficacy of Picosulfuric acid can be decreased when used in combination with Cefdinir."
Clinical Note
moderateIron sucrose + Cefdinir
"The serum concentration of Cefdinir can be decreased when it is combined with Iron sucrose."
Clinical Note
moderateIron + Cefdinir
"The serum concentration of Cefdinir can be decreased when it is combined with Iron."
Clinical Note
moderateFerric pyrophosphate + Cefdinir
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: 1.7 ± 0.6 hours (range 1.4-2.3 h) in healthy adults; prolonged in renal impairment (e.g., up to 8 hours in end-stage renal disease).
Ceftazidime: primarily renal (80-90% unchanged); avibactam: primarily renal (85-95% unchanged). Fecal excretion <1%.
Renal: 90-95% unchanged in urine via glomerular filtration and tubular secretion. Biliary/fecal: <1% biliary, <5% fecal.
Category C
Category A/B
Cephalosporin Antibiotic
Cephalosporin Antibiotic
"The serum concentration of Cefdinir can be decreased when it is combined with Ferric pyrophosphate."