Vidalista 2.5 mg is a medication used to treat erectile dysfunction (ED) in men. It contains Tadalafil (Cialis), which is a PDE5 inhibitor that helps improve blood flow to the penis. This medicine works by relaxing the blood vessels, allowing more blood to enter the penis when a man is sexually aroused, which helps achieve and maintain an erection. An erection happens when blood fills the penis. The blood vessels carrying blood to the penis widen, while those that carry blood away narrow. This traps the blood and results in an erection. When a man is sexually stimulated, his body releases nitric oxide in the penis. This triggers the production of cGMP, a chemical that helps regulate blood vessel dilation and promotes an erection.