Homo Sildenafil, an analog of Sildenafil, acts as a phosphodiesterase inhibitor.
[1]. Jackie D Corbin, et al. Vardenafil: Structural Basis for Higher Potency Over Sildenafil in Inhibiting cGMP-specific phosphodiesterase-5 (PDE5). Neurochem Int. 2004 Nov;45(6):859-63.
















