Abx, Antivirals Flashcards
Linezolid MOA
blocks protein synthesis by binding 23S RNA on ribosome subunit
lactic acidosis, if therapy >2wks
linezolid
HTN due to decreased breakdown of dietary tyr
linezolid
crystalline in urinary tract
sulfonamide
hemolytic anemia
sulfonamide
90% bound to serum albumin
daptomycin
contraindicated in PKU
linezolid
competes with deoxyCTP
cidofovir
metabolized to penciclovir
famciclovir
nephrotoxicity
cidofovir
Bacitracin MOA
inhibits wall synth by inhibiting phosphorylation of isoprenyl pyrophosphate carrier protein **no movement of peptidoglycan from inside to outside of mem
causes muscle toxicity if given IM
daptomycin
neurotoxicity, incl seizures
acyclovir valacyclovir
chelates Ca++
foscarnet
antagonizes surfactant = not for trx of pneumonia
daptomycin
inherently active
cidofovir foscarnet
blocks chain elongation
foscarnet
causes electrolyte imbalance
foscarnet
inhibits monoamine oxidase
linezolid
Contraindicated if heme disease or folic acid deficiency
bactrim
prodrug for acyclovir
valacyclovir
cross hypersensivity:
*acyclo, *famciclo, ganciclo, *valacyclo, valaganciclo
peripheral neuropathy
linezolid
concurrent probenecid
cidofovir
muscle pain and weakness
daptomycin
Bactrim MOA
sulfonamide: inhibits PABA for folic acid synthesis trimethoprim: inhibits DHFR (highly selective for bacterial enzyme)
selectively inhibits viral DNA-pol and rev transcriptase at pyrophosphate binding site
foscarnet
distributed to all tissues
bactrim
contraindicated in crohn’s disease
sulfonamide
Causes -penia’s
ganciclovir
NVD, possible psudomembranous colitis
linezolid
optic neuropathy
linezolid
increases protein bound drugs, like warfarin
sulfonamide
use with statins cautioned
daptomycin
metabolized into 2 inactive metabolites
linezolid
Renal failure, due to PEG
bacitracin
Myelosuppression, reversible neutropenia/anemia/thrombocytopenia
linezolid
Mupirocin MOA
reversibly binds to staph isoleucyl tRNA synthetase
increased reaction in HIV patients
bactrim
Daptomycin MOA
disrupts cell membrane => depolarizes => loss of mem potential and K efflux
teratogenic
valacyclovir