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. 2019 Jan 25;8:F1000 Faculty Rev-102. [Version 1] doi: 10.12688/f1000research.16576.1

Figure 1. Molecular pathway of erections (black) and location of action of medications for erectile dysfunction (red).

Figure 1.

AC, adenylyl cyclase; ATP, adenosine triphosphate; cAMP, cyclic adenosine monophosphate; cGMP, cyclic guanosine monophosphate; GC, guanylate cyclase; GTP, guanosine triphosphate; NE, norepinephrine; NO, nitric oxide; PDE5, phosphodiesterase type 5; PDE5i, phosphodiesterase type 5 inhibitor; PDE, phosphodiesterase; PDEi, phosphodiesterase inhibitor; PGE1, prostaglandin E1.