Malegra 100 is a medication used to treat erectile dysfunction (ED) in men. It contains Sildenafil Citrate as its active ingredient, which belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Malegra 100 is known for its relatively rapid onset of action, typically starting to work within 30 minutes to 1 hour after ingestion. Its effects can last for up to 4-6 hours, providing a window of opportunity for sexual activity.