Zenegra 100 mg Tablet is used to treat Erectile Dysfunction (ED) in men. It helps increase blood flow to the penis, making it easier to get and maintain an erection during sexual arousal. It works by relaxing the blood vessels in the penis to allow better blood flow. The key point is that Zenegra 100 mg only works if you are sexually stimulated. You can take Zenegra 100 mg Tablet with or without food, about one hour before planned sexual activity. It usually takes effect in 30 to 60 minutes, but this may vary from person to person. This medicine should only be used if you have erectile dysfunction and is not meant for use by men without this condition.