How to Think About Abx

Abx Categories:

Think in terms of 6 categories you need to cover, rather than all the organisms (except PSA and MRSA):

Gram (+)
Gram (-)
Atypicals
Anaerobes
PSA
MRSA

So for different regimens:

Zosyn (IV): G(+), G(-), PSA, Anaerobes
Vanc (IV): MRSA/MSSA
Azithro (PO): Atypical


OR


Levaquin (PO)(s/e: tendon rupture): PSA, G(-), G(+), Atypicals, Anaerobes
Doxy (PO): Atypical, MRSA (esp community acquired)


Complicated UTI:

Rocephin (IV)(s/e: transaminitis): G(+),G(-)