Penegra 100 mg Tablet is used to treat erectile dysfunction (ED) in men. It helps improve blood flow to the penis, allowing men to get and maintain an erection. It works by relaxing the blood vessels in the penis, so more blood flows in when you're sexually aroused. You can take Penegra 100 mg Tablet with or without food. It’s best to take it about 1 hour before sexual activity. The effects usually begin within 30 to 60 minutes. This medicine only works when you're sexually stimulated and should not be used if you don’t have ED.