Tadalista 20 (Tadalafil 20mg) is a generic version of the prescription medication Cialis, which is used to treat erectile dysfunction (ED) in men. It is a phosphodiesterase type 5 (PDE5) inhibitor, which blocks the PDE5 enzyme. PDE5 is an enzyme that breaks down cyclic guanosine monophosphate (cGMP), a chemical messenger that helps to relax muscles and blood vessels. When PDE5 is blocked, cGMP...