3.Pharmacological action (3)redistribution of coronary blood flow (4)Inhibition of platelet aggregation, increase the release of PGL,and CGRP3. Pharmacological action (3) redistribution of coronary blood flow (3) redistribution of coronary blood flow (4) Inhibition of platelet aggregation (4) Inhibition of platelet aggregation, increase the release of PGI increase the release of PGI2and CGRP and CGRP