Men with erectile dysfunction (ED) are the main patients for the drug Fildena 150 mg. A phosphodiesterase type 5 (PDE5) inhibitor, sildenafil citrate, 150 mg of which is present in it, increases blood flow to the penis and facilitates an erection when sexually stimulated. Men can effectively acquire and sustain an erection during sexual activity with the use of Fildena 150. It functions by allowing for more blood flow by relaxing the blood vessels of the penis. One 150 mg tablet given orally 30 to 60 minutes prior to sexual activity is the standard dosage for Fildena. A daily intake of no more than 150 mg is advised.