t5drugs Flashcards
antibacterial, antidepressants
Penicilloic acid
one of the breakdown products of penicillin that can cause an hypersensitivity rxn
how to tx pseudomonas
1. anti-pseudomonas penicillins: ticracillin and piperacillin
3rd gen cepholosonin(zone and dime),
4th gen cepholosporin
Carbapenems(except Etrapenem)
Monobactam/ Aztronam
amino glycoside
tx febrile neutropenia
anti-pseudomonas penicillins: ticracillin and piperacillin
Cefipime - 4th gen cepholosporins
Chloramphenicol
anything broad spectrum will work
MRSA tx
5th gen - ceftraroline
Vancomycin(DOC)
Daptomycin
tetracyclines
clindamycin
linezolid
mupirocin
rifampin
can be given by inhalation to CF patiences
aztronam for pseudomonas
binds D-ala D-ala
vancomycin
becomes resistant is D-ala changes to D-lactate
empiric
treatment of infective endocarditis
what if the person has a valve replacement
what is there is resistance to the first line
Vanco and gent
if there is a valve replacement add rifampin
if there is resistance to vanco try daptomycin / linezolid
tx c.diff
Vanco (oral!)
Fidaxomicin
Metronidazole
what is daptomycin off limits for (2)
pneumonia
also do not give with statins bc both elevate creatine phosphokinase/ causes muscle pain.
Binds to cell membrane via calcium-dependent insertion
of lipid tail, results in
daptomycin
Results in depolarization of cell membrane with K+ efflux
→ cell death
Bind reversibly to 30S subunit of ribosome, preventing….
tetracyclines
preventing attachment of aminoacyl tRNA
drug that can target intracellular orgs
what else does this drug cover
list then
tetracycline
and covers atypical
listeria, Rocky Mountain, chlamydia/neisseria, mycoplasma
intracellular orgs
10
listeria, Neisseria, herpes, toxplasmosis, chlamydia, mycoplasma tuberculosis, rickettsia, leishmania, brucella-parasite
common tetracycline resistnace
increased efflux pump
inference with binding of ribosomes.
severe acne & rosacea
tetracycline
emperic therapy of outpatient community acquired pneumonia
outpatient with comorbidities
doxycycline
or
macrolide
if comorbidities: rest fluoroquinolone or macrolide plus beta lactam
treating atypical pneumonia
examples?
tetracyclines
macrolides(DOC)
Mycoplasma,
Chlamydia, Legionella
syphillus tx if allergic to peniclinnin
tetracycline
tetracyclin
Drugs of choice for:
Used in combination for:
* H.pylori eradication
* Malaria prophylaxis and treatment
* Treatment of plague, tularemia, brucellosis
- *Chlamydia
- *Mycoplasma pneumoniae
- Lyme disease
- Cholera
- Anthrax prophylaxis
- Rickettsia (Rocky Mountain Spotted Fever,
dont take with calcium
tetracycline
floroquinolones
tetracyclines AE
discoloration of teeth, growth stunt(dont give in pregnancy and under 8yo)
fatal hepatotoxicity
accumulation in many organs including skin causing photosensitivity
concentration dependent killing
aminoglycosides
one dose a day is more efficious
all the other drugs are time dependent killing
30S ribosomal subunit prior to
ribosome formation leading to irreversible inhibition of
initiation complex :
* misreading of mRNA, &
* blockade of translocation
amino glycoside
aminoglycoside resistance
synthesis of enzymes that
modify and inactivate drug by acetylation,
phosphorylation and adenylation
issue with 30s
Empiric therapy of serious infections eg, septicemia,
nocosomial respiratory tract infections, complicated
UTI’s, endocarditis etc
aminoglycosides
Neomycin for
bowel surgery prep and hepatic
encephalopathy, as well as topically
gonorhea
first line
2nd line
if resistant
- ceftriaxone
- aztronam
Gentamicin + azithromycin
high levels of amino glycoside in
renal coretx and inner ear
amino glycoside AE
time and concentration dependent(can accumulate in blood)
ototoxicity, nephrotoxicity, NM blockade, contraindicated in pregnancy bc can cause tubular necrosis
hepatic encephalopathy
neomycin, lactulose, oral vanco, oral metro, rafiximin
reduce
plasma ammonia concentrations
laculose
also acts as a factitive
Reversibly bind to the 23S rRNA of the 50S subunit
blocking…
macrolides
blocking translocation
Binding site is identical or close to that for clindamycin & chloramphenicol
-chloramphenicol blocks peptidyltransferase
-clindamycin blocks translocation
streptogramins also bind here
macrolides resistance
Production of esterase that hydrolyze drugs
modification of ribosomal binding site
emperic therapy of inpatient community acquired pneumonia
macrolide + beta lactam
3/4th gen floroquinolone
(can mix up all three)
DOC for whooping cough (B.pertussis)
erythromycin
CYP P450 inhibition
macrolides: E and C
macrolides AE
hepatic
QT prolongation
GI upset(give fluids)
which antibiotics have contraindications with statins
macrolides (bc inhibits CYP 450)
daptomycin(both elevate CPK)
babesiosis tx
macrolides
life threatening with no alternatives
chloramphenicol
glycyclin
cifipem
streptogratins(G+)
Can inhibit protein synthesis in mitochondrial ribosomes
result?
chloramphenicol
bone marrow toxicity- irreversible aplastic anemia
Inhibits hepatic oxidases (3A4 & 2C9)
chloramphenicol
chloramphenicol AE
bone marrow toxicity
grey baby syndrome
ricketsia
chloramphenicol
causes C diff
clindamycin
amp/amoxicillin
cepholosporins
fluoroquinolone
PCP tx
co-trimethoprim
or
clindamycin + primaquine
toxoplasmosis tx
cotrimoxazole + pyrimethamine
or
clindamycin + pyrimethamine
Binds to unique site on 23S ribosomal RNA of 50S
subunit causing…
linezolid
causing inhibition of 70s complex formation
linezolid ae
long term
bone marrow suppression/ thrombocytopenia
optic neuropathy
peripheral neuropathy
serotonin syndrom if also taking MAO I
Block protein synth by binding RNA polymerase
providing coverage against…
fidaxomicin
covers G+ aerobes and anaerobes
Fidaxomicin AE
GI
approved for all bactrove 6 mo
Only topical/intranasal agent with activity against
MRSA
mupirocin
only treats staph and strep
Binds to bacterial isoleucyl transfer-RNA synthetase
resulting in the inhibition of protein synthesis
mupirocin
meningitis prophylaxis
Cefriaxone
Rifampin
Ciprofloxacin
tx travelers diahrea
first choice and alt
ciprofloxacin
or
amoxicillin
levofloxacin can tx
community acquired pneumonia / walking pneumonia
STDs(not syphillus)
URTI
TB
emperic tx for pylonephritis
floroquinolone
fluoroquinolone ae
CT snapping
peripheral neuropathy
QT prolongation
superinfections
not for children less than 18
Structural analogs of p-aminobenzoic acid (PABA) which will….
sulfonamides
which will inhibit the production of folic acid bc it is a competitive inhibitor to dihydrohopterate synthase
sulfonamides uses
topically for ocular or burns ir orally for UTI
coveras G- and G+
sulfonamides AE
nephrotoxicity - crystaluria
in pts with G6PD causes haemapoetic disturbances
kernicterus
takes other drugs off albumin, so will fuck up warfarin/ phenytoin
Structurally similar to folic acid which will inhibit….
trimethoprime
which will inhibit dihydrofolate reductase
*antifolate products are contraindicated in pregnancy
trimethoprime uses
UTI
prostatitis
vagninitis
reaches high concentrations in the urine and prostatic fluids
cotrimoxazole uses
DOC UTI
DOC PCP
DOC norcardia
toxo, UTRI
cotrimoxazole AE
pancytopenia/hemolytic anemia
renal tubular acidosis in babies
contraindicated in pregnancy for kernicterus, albumin problem and other sulfa AE
cyp450 inhibitor
Undergoes reductive bioactivation of its nitro group by
ferredoxin. Forms cytotoxic products that interfere with nucleic acid
synthesis
metronidazole
Blocks transcription by binding to b subunit of bacterial
DNA-dependent RNA polymerase leading to…
inhibition of RNA synthasis
rifampin
rifampin uses
mycobacteria…TB!
MRSA
G+ and G-(Hib prophylacis)
prophylaxis meningitis
rifampin resistance
rpoB mutation in RNA polymerase
Hib prophylaxis
rifampin
cyp 450 inducers
rifampin