Fildena is a medication used to treat erectile dysfunction (ED) in men. It contains Sildenafil citrate, the same active ingredient found in Viagra. Fildena is part of a class of drugs known as PDE5 inhibitors, and it helps to improve blood flow to the penis, allowing men with ED to achieve and maintain an erection during sexual activity. Sildenafil works by blocking the enzyme PDE5 (phosphodiesterase type 5), which is responsible for breaking down a molecule called cyclic GMP.
https://www.genericday.com/fildena.html