Penicillins

Antimicrobial Normal Adult Dose Cost ($)/Day
amoxicillin 500mg PO tid 1.03
amoxicillin-clavulanate    
7:1 ratio (875mg-125mg) 875mg PO bid 1.11
4:1 ratio (500mg-125mg) 500mg PO tid 2.00
5:1 ratio (500mg-100mg and 1000mg-200mg) 1000mg-200mg IV q8h 12.00
10:1 ratio (2000mg-200mg) 2000mg-200mg IV q8-12h 11.56-17.34
ampicillin 1-2g IV/IM q4-6h 21.29 - 63.87
penicillin VK 300mg PO qid 0.75
penicillin G Na 3-4MU IV/IM q4-6h 12.24 - 24.48
cloxacillin 500mg PO qid 2.93
  1-2g IV/IM q4-6h 22.40 - 43.86
piperacillin-tazobactam 3.375g IV q6h 25.04
HAP/VAP 4.5g IV q6h 33.38
IAI 4.5g IV q8h 25.04

HAP = hospital-acquired pneumonia
IAI = intra-abdominal infection
VAP = ventilator-associated pneumonia