Aminopenicillins
Ampicillin – IV/PO
Amoxicillin – PO (better absorbed)
Coverage: like natural PCN (Strep, Enterococcus, Listeria) plus:
E. coli (60%)
Proteus mirabilis
H. influenzae (70%)
Clinical Uses
Otitis media (Drug of Choice)
Listeria monocytogenes
Enterococcus (if susceptible)
Alternative for Strep. species
Community-acquired upper respiratory infections (sinusitis)
Penicillinase Resistant Penicillins
Nafcillin (IV)
Oxacillin (IV)
Dicloxacillin (PO)
Cover Staphylococcus aureus (MSSA) and most Streptococcus
Usually drug of choice (DOC) for serious methicillin-susceptible staph infections (along with cefazolin)
Also used for simple cellulitis