Zenegra 100mg is used to treat erectile dysfunction (ED). ED is a common condition where a man has difficulty achieving or maintaining hardness. Zenegra contains sildenafil citrate as the active ingredient, increasing blood flow, and leading to improved hardness. This medication should be taken with a glass of water, approximately 30 minutes before going on bed, and only once in a 24-hour period. It is essential to talk to your doctor before taking Zenegra to ensure it is safe for you to use and to determine the appropriate dosage.