Fildena 50 is a very effective drug used to treat sexual problems in men. This drug contains the main ingredient sildenafil, which works to increase blood flow in the penis and relax the muscles. This medicine works best on an empty stomach, so you should take this medicine on an empty stomach. You can use this medicine 1 hour before sexual intercourse and enjoy a strong 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 also be seen on your body.