EXPLODING BACTERIAMed Decision Speed Tools
ceph4Unverified

Cefepime

Generic, Maxipime®
PregnancyBreastfeedingWarfarin
Open the full CAP page →
β-LactamPick onerequired
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FluoroquinolonePick onerequired
±
Anti-MRSAOptionalif risk
Choose ONE Antipseudomonal β-Lactam
Cefepime₄
2 g IV q8h
IV
500 mg1 g2 g
BrandsGeneric, Maxipime®
View full Cefepime page →
Ceftazidime₃
???
2 g IV q8h
IV
500 mg1 g2 g6 g
BrandsGeneric, Fortaz®, Tazicef®
View full Ceftazidime page →
Imipenem-Cilastatin
???
Your EMR may offer you a “helpful” allergy warning when ordering a carbapenem because your patient is allergic to penicillins or cephalosporins; the cross reactivity is very low and most people tolerate carbapenems with a low risk of allergic reaction.
500 mg IV q6h
IV
250 mg500 mg
BrandsGeneric, Primaxin®
View full Imipenem-Cilastatin page →
Meropenem
???
Can increase to 2 g IV q8h for CNS involvement.
Your EMR may offer you a “helpful” allergy warning when ordering a carbapenem because your patient is allergic to penicillins or cephalosporins; the cross reactivity is very low and most people tolerate carbapenems with a low risk of allergic reaction.
1 g IV q8h
IV
500 mg1 g
BrandsGeneric, Merrem®
View full Meropenem page →
Piperacillin-Tazobactam
???
Extended infusion (4 hr) preferred if available.
4.5 g IV q6h
IV
2.25 g3.375 g4.5 g
BrandsGeneric, Zosyn®
View full Piperacillin-Tazobactam page →
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AND Choose ONE Fluoroquinolone
Ciprofloxacin
!!
400 mg IV q8h / 750 mg PO q12h
Tablets
250 mg500 mg750 mg
Liquid
250 mg/5 mL500 mg/5 mL
IV
200 mg/100 mL400 mg/200 mL
BrandsGeneric, Cipro®
View full Ciprofloxacin page →
Levofloxacin
???
750 mg IV/PO q24h
Liquid
25 mg/mL oral solution
Tablets
250 mg500 mg750 mg
IV
5 mg/mL (premix)25 mg/mL (vial)
BrandsGeneric, Levaquin®
View full Levofloxacin page →
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Consider ONE Anti-MRSAONLY if risk factors
Add anti-MRSA only for a real risk factor — it is not routine in CAP.
Risks: prior MRSA (infection, colonization, or positive nasal PCR); hospitalization or IV antibiotics ≤90 days; severe, necrotizing, or cavitary pneumonia; empyema; recent influenza; ESRD/dialysis; injection drug use.
Negative nasal PCR (NPV ~95–99%) → reasonable to withhold or stop.
VancomycinMRSA
???
Monitor: target AUC/MIC 400–600; check a level before the 4th dose.
15–20 mg/kg IV q8–12h
IV
500 mg750 mg1 g1.25 g5 g
Capsules — PO, C. diff only
125 mg250 mg
BrandsGeneric, Vancocin®
View full Vancomycin page →
LinezolidMRSA · VRE
???
600 mg IV/PO q12h
Tablets
600 mg
Liquid
100 mg/5 mL
IV
600 mg/300 mL
BrandsGeneric, Zyvox®
View full Linezolid page →
Other regimens for this scenario don't include Cefepime — see the full page for the complete algorithm.
Open the full DFI page →
Scope: soft-tissue infection without evidence of osteomyelitis. Probe-to-bone or exposed bone suggests osteomyelitis — treat as osteomyelitis (different workup and a longer course).
Group APick onerequired
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Anti-MRSAPick onerequired
Group A
Imipenem-Cilastatin
???
Your EMR may offer you a “helpful” allergy warning when ordering a carbapenem because your patient is allergic to penicillins or cephalosporins; the cross reactivity is very low and most people tolerate carbapenems with a low risk of allergic reaction.
500 mg IV q6h
IV
250 mg500 mg
BrandsGeneric, Primaxin®
View full Imipenem-Cilastatin page →
Meropenem
???
Your EMR may offer you a “helpful” allergy warning when ordering a carbapenem because your patient is allergic to penicillins or cephalosporins; the cross reactivity is very low and most people tolerate carbapenems with a low risk of allergic reaction.
1 g IV q8h
IV
500 mg1 g
BrandsGeneric, Merrem®
View full Meropenem page →
Piperacillin-TazobactamPseudomonal dose
???
4.5 g IV q6h
IV
2.25 g3.375 g4.5 g
BrandsGeneric, Zosyn®
View full Piperacillin-Tazobactam page →
Cefepime₄ AND Metronidazole
Cefepime₄2 g IV q8h
Metronidazole500 mg IV q8h
Ceftazidime₃ AND MetronidazolePseudomonal dose
Ceftazidime₃2 g IV q8h
Metronidazole500 mg IV q8h
Ciprofloxacin AND Metronidazole
Ciprofloxacin400 mg IV q8h or q12h
Metronidazole500 mg IV q8h
Levofloxacin AND Metronidazole
Levofloxacin750 mg IV q24h
Metronidazole500 mg IV q8h
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Anti-MRSA
DaptomycinMRSA and VRE
???
4 mg to 6 mg/kg/day IV q24h
IV
350 mg vial500 mg vial
BrandsGeneric, Cubicin®
View full Daptomycin page →
LinezolidMRSA and VRE
???
PO and IV have the same bioavailability.
600 mg IV/PO q12h
Tablets
600 mg
Liquid
100 mg/5 mL
IV
600 mg/300 mL
BrandsGeneric, Zyvox®
View full Linezolid page →
VancomycinMRSA
???
Rounding to nearest 250 mg is common and based on actual body weight.
15 mg/kg IV q8h to q12h + therapeutic monitoring
20 mg/kg IV q8h to q12h + therapeutic monitoring

Consider a loading dose in critically ill patients
25 mg/kg IV (loading dose)
30 mg/kg IV (loading dose)
IV
500 mg750 mg1 g1.25 g5 g
Capsules — PO, C. diff only
125 mg250 mg
BrandsGeneric, Vancocin®
View full Vancomycin page →

Drug Info

IV
500 mg1 g2 g
BrandsGeneric, Maxipime®

Safety

PregnancyGenerally considered safe; no evidence of fetal harm.
BreastfeedingMinimal excretion in breast milk; compatible.
WarfarinNo significant interaction.