Suhagra 100 is one such drug. Used in the treatment of erectile dysfunction in men. This drug works by increasing blood flow to the muscles. This drug is used for men over 18 years of age. This drug is taken 1 hour before the plan of intercourse. The drug takes effect in 30 minutes. This medicine works for 4 to 5 hours. This drug has proven to be 100% effective for impotence.