Despite the similarity in the cellular mechanism of action among calci
um channel blockers, they differ in potency, cardiovascular properties
, and pharmacokinetics. Among calcium channel blockers, the dihydropyr
idine-type agents have greater vascular specificity and antihypertensi
ve effects. Nicardipine, an example of an intravenous dihydropyridine
calcium channel blocker, also has favorable pharmacokinetic and pharma
codynamic characteristics, which allow easy titration and monitoring o
f antihypertensive effect. This article reviews the characteristics of
calcium channel blockers and their relevance for the treatment of acu
te hypertension.