A<unk> is a drug that blocks one or more of the five subtypes of the enzyme<unk>  (PDE), therefore preventing the inactivation of the intracellular second messengers, cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP), by the respective<unk> ubtype(s).
Phosphodiesterase inhibitors
COX-2 inhibitor
Glycoprotein IIb/IIIa inhibitors
Renin inhibitor
Statins
ACE inhibitor
Calcium channel blocker
Antagonist 