Vigora 100 tablets are recommended for men suffering from impotence. This medicine helps men to get hard and long lasting erections in their sex life. Vigora 100 contains Sildenafil as an active ingredient. Taking this medicine strengthens and relaxes blood vessels in men. This medicine is taken in different doses. Vigora 100 is taken 30 minutes before sexual intercourse. The effect of this medicine is observed for 4 to 5 hours in men.