NBME 21

nbme21/Block 3/Question#44

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

Stabilization of mast cell membranes

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submitted by mcl(0),

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.