Sildigra is a medication used to treat erectile dysfunction (ED) in men. The active ingredient in Sildigra is Sildenafil Citrate, which is the same ingredient found in Viagra. Sildenafil works by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually aroused. Sildigra should be taken with a glass of water, about 30 to 60 minutes before sexual activity. It can be taken with or without food, but consuming it with a heavy or fatty meal may delay its effects. A prolonged, painful erection lasting more than 4 hours, which requires immediate medical attention.