Vigora Oral Jelly is a medicine used for the treatment of erectile dysfunction (ED) in men. It commonly contains sildenafil citrate, a phosphodiesterase type 5 (PDE5) inhibitor that helps improve blood flow to the penis during sexual stimulation. Sildenafil helps block the PDE5 enzyme, which increases levels of cGMP, a chemical that relaxes smooth muscles in penile blood vessels. This allows more blood to flow into the penis, helping achieve and maintain an erection when a man is sexually aroused. It does not increase sexual desire and does not work without stimulation.