The active ingredient has been classified as a selective inhibitor of PDE-5. When a man is sexually aroused or aroused, he triggers the production of the chemical cGMP. Vidalista 20 works by blocking the action of the enzyme PDE-5, which in turn produces more cGMP in the smooth muscles of the genitals. It is cGMP that is responsible for producing an erection, by promoting relaxation and vasodilation. This drug allows cGMP to build up, which improves blood flow to the genitals and allows for stronger, longer-lasting erections for satisfying s*xual intercourse. Patients taking Vidalista 20 mg have reported fast onset times and being able to achieve firmer, stronger erections. For more information on tadalafil, Vidalista 20 mg, or any other tadalafil medication, readers are advised to consult their physician or health care professional.