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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 |