Malegra Pro 100 mg contains sildenafil citrate, which is a medication primarily used to treat erectile dysfunction (ED) in men. Sildenafil citrate belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors, which work by increasing blood flow to the penis during sexual stimulation, leading to improved erectile function. Malegra Pro 100 mg is typically taken orally as needed, approximately 30 minutes to 1 hour before sexual activity. The onset of action may occur within 30 minutes to an hour, and the effects can last for up to 4 to 6 hours in some individuals.