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NBME 21 Answers

nbme21/Block 3/Question#44

A 23-year-old woman develops persistent sneezing ...

Stabilization of mast cell membranes

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 +3  upvote downvote
submitted by hungrybox(175),

other answers:

inhibition of H2 receptors: (for GERD) prevent gastric acid secretion (cimetidine,

inhibition of phosphodiesterases (PDE):

  • theophylline (asthma) inhibits cAMP PDE
  • -nafils (dick pills) for ED inhibit cGMP PDE

β2 agonists: (for asthma) cause bronchodilation

  • albuterol (short acting - A for Acute)
  • salmeterol, formoterol (long acting - prophylaxis)

(idk lymphocyte membrane stabilization)

hungrybox  H2 blockers are the -tidines +1  
yotsubato  > dickpills lol +5  
temmy  hungrybox, you are a life saver +1  
cienfuegos  Via FA: take H2 before you dine, think "table for 2" to remember H2 +  

 +2  upvote downvote
submitted by mcl(167),

While antihistamines with action at H1 receptors are used for allergies, H2 antihistamines are typically used for ulcers. Therefore the best answer is stabilization of mast cell membranes. These drugs (cromolyn) prevent vesicles of histamine from fusing with the membrane.