It is known as generic viagra. It relaxes muscles and improves blood flow to specific areas of the body. It is commonly used in the treatment of erectile dysfunction (a disorder in which men are unable to erect their penis during intercourse). Suhagra should be taken 30 minutes before physical intercourse. It starts showing its effect within 30 minutes of its consumption and the effect lasts up to 4 hours. It is administered by oral route. The drug starts its action only when the male is aroused.