Figures & data
Figure 1. Causes of erectile dysfunction (adapted from Guay [Citation6]).
![Figure 1. Causes of erectile dysfunction (adapted from Guay [Citation6]).](/cms/asset/a547622b-5d2c-4cb0-aae5-836d0ea9a132/itam_a_801952_f0001_b.jpg)
Figure 2. Action mechanism of sildenafil. eNOS – endothelial nitric oxide synthase; NO – nitric oxide; GTP – guanosine-5'-triphosphate; cGMP – cyclic guanosine monophosphate; GMP – guanosine monophosphate; PDE 5 – phosphodiesterase type 5; Ptn – protein; PKG – protein kinase G.
![Figure 2. Action mechanism of sildenafil. eNOS – endothelial nitric oxide synthase; NO – nitric oxide; GTP – guanosine-5'-triphosphate; cGMP – cyclic guanosine monophosphate; GMP – guanosine monophosphate; PDE 5 – phosphodiesterase type 5; Ptn – protein; PKG – protein kinase G.](/cms/asset/07728843-87f1-45e4-a5ad-a11b9763f813/itam_a_801952_f0002_b.jpg)