Sildenafil acts as the active ingredient in the Fildena 150 drug. Fildena 150mg is taken shortly before intercourse, which lasts for 4-5 hours. The main function of Fildena 150 Mg is to increase blood flow to the uterus during ED. So that the couple can feel the sex better for a long time at the time of their sex. Seek medical advice before taking Fildena 150 Mg.