Original OrderSubstitution
Amoxicillin-Clavulanate-250 (250mg/125mg) PO tid in adultsAmoxicillin-Clavulanate-500 (500 mg/125mg) PO bid
Amoxicillin-Clavulanate-500 (500mg/125mg) PO tid in adults With CrCl greater than 30mL/minAmoxicillin-Clavulanate- 875 (875 mg/125mg) PO bid
Amoxicillin-Clavulanate 125 or 250 suspension (4:1) PO bid in pediatricsAmoxicillin-Clavulanate 400 suspension ( 7:1) PO bid ( same dose of amoxicillin)
Amoxicillin-Clavulanate 125 or 250 suspension (4:1) PO tid in pediatricsAmoxicillin-Clavulanate 400 suspension (7:1) PO tid (same dose of amoxicillin)
Ampicillin IV 500mg in adultsAmpicillin 1g IV
Ampicillin PO qidAmoxicillin PO tid at same dose excluding shigellosis
Anidulafungin 200mg IV in adultsCaspofungin 70mg IV in adults **excluding patients with Child-Pugh scores greater than 9
Anidulafungin 100mg IV in adults Caspofungin 50mg IV in adults **excluding patients with Child-Pugh scores greater than 9
Cefaclor 250mg PO tid in adults Cefuroxime axetil 250mg PO bid
Cefaclor 500mg PO tid in adults Cefuroxime axetil 500mg PO bid
Cefaclor PO in pediatrics Ceprozil q12h same dose
Cefazolin IV q6h Cefazolin IV q8h at same dose
EXCEPT ID consulted patients, septic arthritis, S. aureus bacteremia or obesity
Cefoxitin in surgical prophylaxis Cefazolin 2g IV + metronidazole 500mg IV
Cefotetan Cefazolin 2g IV q8h + metronidazole 500mg IV q12h
Cefotaxime 1g IV q8h in adults Ceftriaxone 1g q24h
Cefotaxime 2q IV q8h in adults Ceftriaxone 2g q24h
Cefotaxime 2g IV q6h in adults Ceftriaxone 2g q12h
Cefotaxime xmg IV q8h in pediatrics (neonates excluded) Ceftriaxone xmg q24h same mg dose
Cefotaxime xmg IV q6h in pediatrics (neonates excluded) Ceftriaxone xmg q12h same mg dose
Cefriaxone IV q12h in adults EXCEPT CNS infection and Enterococcal endocarditis for synergy Ceftriaxone IV q24h same mg dose
Ciprofloxacin 200mg IV q12h in adultsCiprofloxacin 400mg IV q24h
Clindamycin IV q6h Clindamycin IV q8h at same dose
Clindamycin IV > 600mg per dose

** Excluding necrotizing fasciitis or streptococcal toxic shock syndrome
Clindamycin IV 600mg
Imipenem IV Meropenem IV same dose
Meropenem IV 1gm q8h Meropenem IV 500mg q6h

**Except CNS infections and febrile neutropenia
Metronidazole IV q6-8h in adults Metronidazole IV q12h at same dose excluding subdural empyema or brain abscess (use q8h) and excluding C-difficile (can use q6-8h)
Nitrofurantoin macrocrystals (shortacting) – ordered as QID Please contact prescriber to change to Macrobid bid

For patients whose medications required crushing (i.e. tube feeding), can automatically autosubstitute with short-acting nitrofurantoin microcrystals tablets at same dose and frequency
Norfloxacin 400mg PO Ciprofloxacin 250mg PO same frequency
Oseltamivir in doses >75mg BID x 5 days in adults Oseltamivir 75 mg BID for 5 days
Penicillin G K+ PO Penicillin V K+ PO at equivalent dosage and form