Zudena 100 mg Tablet is used to treat erectile dysfunction. It generally starts to work within about 15 to 30 minutes after taking the tablet. However, its effectiveness can depend on factors like individual response, whether it's taken with food, and the level of sexual arousal. For optimal results, it's best to follow the dosing instructions provided by your healthcare provider. If you have any concerns or questions about its use, consulting a healthcare professional is a good idea.