Respiratory Drugs Flashcards
What is COPD most commonly d/t?
Cigarette smoke
What are two different types of COPD?
Bronchitis
Emphysema
How is chronic bronchitis caused?
Mucociliary escalator system becomes paralyzed
How is emphysema caused? D/t what?
Alveoli become hyper-inflated
D/t macrophage releasing protease that destroys elastin
What are three things that cause SOB in asthma?
Bronchoconstriction
Edema
Mucus production
What are environmental factor that cause asthma?
Exercise
Cold air
Allergens
What inflammatory chemicals cause asthma?
Histamine
Prostaglandins
Leukotrienes
ECF-A
What does ICS inhibit?
PLA2
What does LTRA stand for?
Luekotriene receptor antagonist
What are the 3 classes of bronchodilators?
Beta-2 agonist
Anticholinergics
Methylxanthines
What are two types of beta-2 agonist?
LABA
SABA
What is the MOA of beta agonists?
Activate adenylate cyclase to increase cAMP which causes SM dilation
What does phosphodiesterase (PDE) do to cAMP?
Breaks down cAMP
What is the MOA of methylxanthines?
Inhibits PDE and adenosine
What does adenosine do?
Increases release of histamine which increases bronchoconstriction
What is the MOA of muscarinic antagonists?
Decrease the release ACh which causes bronchoconstriction