Which category of medications is used for peripheral vascular diseases characterized by excessive vasoconstriction, such as Raynaud's disease?
a. Adrenergic agents
b. Alpha-adrenergic blocking agents
c. Beta-adrenergic blocking agents
d. Cholinergic agents
ANS: B
Alpha-adrenergic blocking agents interfere with the stimulation of alpha-1 and alpha-2 receptors. Because the primary action of alpha receptor stimulation is vasoconstriction, alpha-adrenergic blocking agents are indicated for patients with diseases associated with vasoconstriction. Adrenergic drugs cause vasoconstriction. Beta-adrenergic blocking agents are used to treat hypertension and dysrhythmias. Cholinergic drugs are used to treat ocular diseases such as glaucoma, respiratory tract disease, and urinary system diseases.
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