Malegra 100 contains sildenafil citrate, which belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. It works by increasing blood flow to the penis during sexual stimulation, enabling the achievement and maintenance of an erection. It usually starts working within 30 to 60 minutes after ingestion. The effects of Malegra 100 can last up to 4 to 6 hours, providing a suitable timeframe for sexual activity. Take Malegra 100 mg orally with a full glass of water, approximately 1 hour before engaging in sexual activity. Avoid taking more than one dose per day to prevent potential side effects and complications.