Fildena is a medication that contains Sildenafil Citrate 300 mg (though the standard common dose is usually 25 mg–100 mg; 300 mg is considered very high and unusual). Sildenafil is the active ingredient also found in Viagra. It is primarily used to treat erectile dysfunction (ED) in men. Sildenafil works by increasing blood flow to the penis during sexual stimulation. It relaxes blood vessels in the penis, allowing more blood to enter and help achieve and maintain an erection. It does not automatically cause an erection; sexual arousal is still required. https://www.genericday.com/fildena.html