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The epidemiology of infections sustained by multidrug-resistant Gram-negative bacteria is rapidly evolving. New drugs are available or are on the horizon. Most are combinations of a β-lactam and a β-lactamase inhibitor. One part is the antibiotic cefiderocol that has a peculiar antibacterial mechanism of action. Dispensing of such an armamentarium requires in-depth knowledge of their microbiological spectrum of activity, pharmacokinetic/pharmacodynamic (PK/PD) properties, and clinical study results. The following will describe the antibacterial strategy of aztreonam in combination with avibactam.
DRUGS | PK/PD Index | T ½ (h) | Vd (L) | PB (%) | ELF/ Plasma (%) |
References |
---|---|---|---|---|---|---|
aztreonam/avibactam | 60% fT > MIC/ 50% fT > CT |
2.3–2.8/1.8–2.2 | 20/26 | 56/8 * | 30/30 | [6][8][11][12][13] |
cefepime/ enmetazobactam |
60% fT > MIC/ 20–45% fT > CT |
2.1/** | 18.2/** | 16–19/** | 61/53 | [14][15][16] |
cefepime/taniborbactam | 50% fT > MIC/ fAUC24/MIC |
2.1/4.7 * | 18.2/37.4 | 16–19/** | na | [16][17][18] |
cefepime/zidebactam | 30% fT > MIC/ fAUC24/MIC |
2.0/1.9 | 15.4/17.4 | 20/< 15 | 39/38 | [19][20] |
cefiderocol | ƒT/MIC ≥75% | 2.7 | 18 | 40–60 | 10–23 | [11][21][22] |
ceftaroline-fosamil/ avibacatm |
40–50% fT > MIC/ f T > CT; fAUC |
2.4/2.0 * | 19.8/18 * | 20/8 * | 23/30 * | [8][23][24] |
ceftolozane/ tazobactam |
35% fT > MIC/ % f T > CT |
3.5/2.5 | 13.5/18.2 | 21/30 | 61/63 | [25][26][27] |
ceftazidime/avibactam | 50 % fT > MIC/ 40 % fT > CT |
2.0/2.0 | 14.3/15–25 | <10/5.7–8.2 | 52/42 | [8][11][28][29][30] |
imipenem/relebactam | 6.5% fT > MIC/ fAUC24/MIC |
1/1.2 | 24.3/19 | 20/22 | 55/54 | [29][31][32] |
meropenem/nacubactam | 40% fT > MIC/ fAUC24/MIC * |
1/2.6 * | 15–20/21.9 * | 2/2 * | na | [33] |
meropenem/vaborbactam | 40% fT > MIC/ fAUC24/MIC * |
1.3/1.9 | 20.2/18.6 | 2/33 | 65/79 | [34][35][36][37] |
Drugs | Recommended Dosage | Adjustment in RI | Authorized for Use in the European Union and by FDA |
References |
---|---|---|---|---|
aztreonam/ avibactam |
Not available | Not available | no | |
cefepime/ enmetazobactam |
Not available | Not available | no | |
cefepime/ taniborbactam |
Not available | Not available | no | |
cefepime/ zidebactam |
Not available | Not available | no | |
cefiderocol | Pneumonia: 2 g q 8 h (7 days) cUTI: 2 g q 8 h (7–14 days) |
CrCl ≥120 mL/min: 2 g q 6 h CrCl 60–120 mL/min: 2 g q 8 h CrCl 30–60 mL/min: 1.5 g q 8 h CrCl 15–30 mL/min: 1 g q 8 h CrCl <15 mL/min: 750 mg q 12 h |
yes | [24][38][39] |
ceftaroline-fosamil/ avibactam |
Not available | no | ||
ceftozolane/ tazobactam |
cIAI: 1.5–3 g q 8 h (4–5 days) Pneumonia: 3 g q 8 h (7 days) Bloodstream infection, skin and soft tissues: 1.5–3 g q 8 h cUTI: 1.5 g q 8 h |
CrCl >50 mL/min: 1.5 g q 8 h 3 g q 8 h CrCl 30–50 mL/min: 750 mg q 8 h 1.5 g q 8 h CrCl 15–29 mL/min: 375 mg q 8 h 750 mg q 8 h |
yes | [40][41][42][43][44] |
ceftazidime/ avibactam |
cIAI: 2.5 g q 8 (4–5 days) Pneumonia: 2.5 g q h (7 days) cUTI: 2.5 g q 8 h (5–14 days) |
CrCl >50 mL/min: 2.5 g q 8 h CrCl 31–50 mL/min: 1.25 g q 8 h CrCl 16–30 mL/min: 0.94 g q 12 h CrCl 6–15 mL/min: 0.94 g q 24 h CrCl <5 mL/min: 0.94 g q 48 h |
yes | [30] |
imipenem/ relebactam |
cIAI: 1.25 g q 6 h (4–7 days) Pneumonia: 1.25 g q 6 h (7 days) cUTI: 1.25 g q 6 h (5–14 days) |
CrCl ≥90 mL/min: 1.25 g q 6 h CrCl 60–89 mL/min: 1 g q 6 h CrCl 30–59 mL/min: 0.75 g q 6 h CrCl 15–29 mL/min: 0.5 g q 6 h CrCl <15 mL/min: 0.5 g q 6 h |
yes | [32][45][46] |
meropenem/ vaborbactam |
cUTI: 4 g q 8 h (5–14 days) |
CrCl ≥50 mL/min: 4 g q 8 h CrCl 30–49 mL/min: 2 g q 8 h CrCl 15–29 mL/min: 2 g q 12 h CrCl <15 mL/min: 1 g q 12 h |
yes | [37][47][48][49][50] |
meropenem/nacubactam | Not available | Not available | no |