Fildena 25 medicine belongs to the PDE5 inhibitor class of drugs used to treat erectile dysfunction (ED). Sildenafil citrate is the chemical ingredient present in it. It is also known as generic viagra or generic sildenafil. This medicine is only recommended for men aged 18 and above. Using this medicine improves your sex life. You can use this medicine 1 hour before intercourse and enjoy a satisfactory erection. Cold drinks or alcohol should not be consumed while taking this medicine as it slows down the effect of the medicine and its side effects can be seen directly on your body.