Tadalafil Femalefil is backed by science to some extent, as it contains Tadalafil, a PDE5 inhibitor that increases blood flow—similar to how Cialis works for men. Some clinical studies suggest it may help women with Female Sexual Arousal Disorder (FSAD) by enhancing genital blood circulation and sensitivity. However, unlike male ED drugs, research on its effectiveness for women is still limited and ongoing. While many users report positive results, it’s not a guaranteed solution and should be used under medical supervision. So, it’s part science-backed, part hype—depending on individual response.