tetracyclins Flashcards
1st gen. chloro floro carbons damage o2 and dermis
tetracycline
oxytetracycline
chlortetracycline
demeclocycline
2nd gen. mini metha maar rahi ha k oxy se doxy hu giya ha
minocycline
methacycline
doxycycline
3rd generation
glycylcyclin
syn gylcyl amido der. of minocycline
not available
MOA
entry through porins g- bact. entry in g+ bact. unknown energy dependent bind reversibly to 30S subunit of ribosome prevent attachment of t- RNA
resistance
efflux pump
dec. penetration
enzymatic deactivation of drug
dec. access due to ribosome protecting proteins
absorption
incomplete
best absorbed on empty stomach
on empty stomach chlortetracycline oxy demeclo tetra doxy mino
30%
60-80% (D)
95 -100%
impaired absorption
dairy products
al hydro oxide gel
ca mg iron zn salts
bismuth subsalicylates
widely distributed
throughout body
found in secretion; prostate and urine
accumulated in
reticuloendothelial cells; liver + spleen + bone marrow
bones
dentin + enamel - unerupted teeth
can cross
placental barrier
found in breast milk
exretion
primarily by kidney
liver met.
minocycline
g+ organisms
SHY FIPPi Bought a Cute Little Vallet
(anaerobes + aerobes)
s. pneumonia
h. ducreyi
helicobacter pylori
yersenia; pestis + eneterocolitica
francisella tularensis
h. influenza
p. multocida
pseudomonas pseudomallie
brucella
compylobacter jejuni
liogenella pneumophilla
vibrio cholera
rickettsia
rocky mountain spotted fever
q fever
scrub typhus
typhus
miscellaneous
SuB TuM sa ha
spirochetes borellia treponema pallidum treponema pertenue mycobacterium marinum
effect on intestinal flora
incomplete absorption high lvls reach bowel effect intestinal flora yellow greenish discoloration to stool soft consistency pseudomem. colitis - c. dificile
rickettsia
rocky mountain spotted fever
typhus
rickettisial pox
q fver
mycoplasmal inf.
mycoplasma pneumonia
chlamydia
lymphogranuloma venerum -doxy
pnuemonia + bronchitis + sinusitis -c. pneumonia
trachoma
non specific urithritis - c. trachomatis
sexualy transmitted diseases
uncomplicated gonococcal inf.
3rd gen. cephalosporins gen. prescribed
bacilary inf.
brucellosis
tularemia
cholera
acne
propioni bact.
toxicities
KAPIL DeV G
kidney disorder - fanconi syn.
anabolic effects
phototoxicity
inc. intracranial hypertension - until drug use
liver toxicity - oxy + tetra less toxic
dental discoloration/ hypoplasia /hypersensitivity
vesitubuler dysfunc. - minocycline + ataxia
GI disturbances + pseudomem. colitis
contraindications
pregnant ladies
children under 8 yrs