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NBDE Part II > Antihistamines > Flashcards

Antihistamines Flashcards

1
Q

What are H1 antihistamines useful for?

A
  1. Treating dermatologic manifestations of an allergic response (like chlorpheniramine)
  2. Pre-operative medication for sedation, anti-emetic properties, anticholinergic effects (promethazine)
  3. For controlling the symptoms of parkinsonism (diphenhydramine)
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2
Q

What are H2 antihistamines used for?

A

To reduce gastric acid secretion (like cimetidine - now OTC for heartburn)

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3
Q

What is a common H1 antihistamine used for preop medication?

A

Promethazine

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4
Q

What is the mechanism of action of H1 antihistamines?

A

Competitive Antagonism - they are competitive antihistamine receptor blockers.

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NBDE Part II (13 decks)

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