ADP	Adenosine diphosphate
ADPβS	Adenosine 5′-O-2-thiodiphosphate
AMP	Adenosine 5′-monophosphate
ATP	Adenosine 5′-triphosphate
cGMP	Cyclic guanosine monophosphate
CGRP	Calcitonin gene-related peptide
CNS	Central nervous system
DBP	Diastolic blood pressure
D–R curves	Dose-response curves
I.v.	Intravenous route of administration