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NBME 18 Answers

nbme18/Block 2/Question#21 (22.6 difficulty score)
66 yo woman, 2 days of fever, flank pain, ...
Calcium carbonateπŸ”
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 +5 
submitted by krewfoo99(93),
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almcCiu rataCenob si na catnaid cwhih acn hltecea and saederec tfsvnfeeceesi of thero gdusr schu sa ltctnacseriye and usrofloionqulne




 +4 
submitted by madmoroccan(4),
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taidelnv itasnco eeneitrfr hitw eth bptisnoaor abrin(o)sot?d fo xincfio.oparlC

redvelvet  divalent cations interfere with the absorption of tetracyclines, not fluoroquinolones. anti-acids interfere with the absorption of fluoroquinolones. (like in this q, it's ca carbonate) +2  
keyseph  According to SketchyPharm, divalent cations also interfere with the absorption of fluoroquinolones +10  
nbmeanswersownersucks  Calcium carbonate is an antacid but it has Calcium in it....which is a divalent cation +2