Malegra 100 is a medication containing sildenafil citrate, which is used to treat erectile dysfunction in men. The onset of action can vary from person to person, but typically it takes around 30 minutes to 1 hour for Malegra 100 to start working. However, it’s important to note that the medication’s effectiveness can be influenced by various factors, such as the individual’s metabolism, presence of food in the stomach, and overall health. It’s recommended to follow the instructions provided by the healthcare professional or the information leaflet that comes with the medication for specific guidance on usage and onset of action. Additionally, it’s always advisable to consult with a healthcare professional for personalized advice and recommendations regarding the use of any medication.