click below
click below
Normal Size Small Size show me how
Pharm Abx 2
Fall 2011, pharm I
Question | Answer |
---|---|
What is the name of the main sulfa abx used? | Trimethoprim/Sulfamethoxazole (TMP/SMX) |
MOA of TMP/SMX? | -Blocks folate pathway=inhib DNA, RNA, protein produx |
TMP/SMX is the DOC for what? | -Pneumocystitis pneumonia (AIDS) (for trtmt and prophylaxis) -UTI:uncomplicated cystitis (when E.coli sensitive) |
Other common uses of TMP/SMX? | -RTI, UTI, GI infex |
TMP/SMS comes in what forms? | Oral, IV |
TMP/SMX trade names? | Bactrim, Septa |
AE of TMP/SMX? | -HyperK+ (esp w/ACEi/ARB, K+sp diuretic, K+supp) -15%sulfa allergy -GI upset, rash, photosens -Rare: TENS/SJS, leukopenia.. |
CI for TMP/SMX? | -Hypersens to any sulfa drug, folate defic anemia, infants<2mo, marked hep/renal dysfxn, lactat |
What is a special drug interax to consider w/TMP/SMX? | -Warfarin..should decrs dose (CYP2C9 inhib) |
Gentamicin and Tobramycin are both examples of? | Aminoglycosides |
Aminoglycoside spectrum of activity? | -Good activity against all G- aerobes |
What are aminoglycosides used for, commonly? | -Serious hosp-acquired infex caused by enterobacteriacea, pseudomonas |
Common AEs of aminoglycosides? | Ototoxicity - usually irreversible |
Common example of a tetracycline? | Doxycycline |
Trade name of Doxycycline? | Doxy,Vibramycin |
Resistance to tetracyclines is wide-spread, what may be the cause? | Included in animal feeds to promote wt gain |
What is the spectrum of activity in tetracyclines? | Broad |
Any pharmacokin consid w/ tetracyclines? | -Absorption is decrsd by milk, antacids, iron supps, other Ca2+, alum, iron |
Doxycycline is DOC for? | Early stage Lyme dz |
Dosing for Doxy? | 100mg bid x 7-10days |
AEs of tetracyclines? | -Teeth discolor in kids<8 and preg/lactat, GI upset, photosens |
What are the Macrolide meds? | -Erythromycin -Clarithromycin -Azithromycin |
Trade name of Azithromycin? | Zithromax |
Erythromycin covers? | Atypical RTI pathogens |
How is Erythromycin elim? | Excreted in bile |
What is the DOC for Bordatella pertussis? | (whooping cough) -Erythromycin |
Erythromycin inhibits metab of? | -Theophylline and warfarin (=^d levels) |
If a drug has a ^er bioavail, what does that mean for the GI tract? | Less effects! Erythromycin 25% vs Clarithromycin 50%! |
Clarithromycin inhibits metab of? | -Theophylline and Warfarin =^d levels, but only 50% amt that Erythromycin affects it |
Clarithrymycin advantages over Erythromycin? | -^spectrum of activity -Less drug interax -Fewer GI side effects |
Azithromycin has great action on which class of dz's? | STIs |
Which macrolide really gets into the cells and has a t1/2 of 68hrs? | Azithromycin |