Tadalafil, the active ingredient in medications like Tadasoft 20mg, is a phosphodiesterase type 5 (PDE5) inhibitor. It works by increasing blood flow to certain areas of the body, particularly the penis. Here is a step-by-step explanation of how Tadalafil works to treat erectile dysfunction:

Release of Nitric Oxide
Increased Levels of cGMP
Relaxation of Smooth Muscle Cells
PDE5 Inhibition
Erection Maintenance