Vigora 100 is intended for the treatment of impotence in men. This medicine contains an ingredient called Sildenafil, which relaxes the muscles that circulate blood in the penis. This medicine is recommended only for men above 18 years of age. You can use this medicine 1 hour before sexual intercourse and enjoy a strong erection. The effect of this medicine usually lasts for 4-5 hours. Using this medicine improves your sex life. Cold drinks or alcohol should not be consumed while taking this medicine as it slows down the effect of the medicine.