The generic brand name Sildenafil Citrate is found in suhagra 100mg tablet. The drug is used to treat erectile dysfunction. The effect of suhagra tablet lasts for 4 to 6 hours. If you take this medicine 30 minutes to 1 hour before sexual intercourse, you can see the good effect of this medicine. Do not take this drug with beverages such as alcohol as this drug can be harmful.