Malegra Pro 100 mg contains the active ingredient sildenafil citrate and is primarily used to treat erectile dysfunction (ED) in men. Sildenafil citrate is a phosphodiesterase type 5 (PDE5) inhibitor, which works by increasing blood flow to the penis during sexual stimulation, thereby helping men to achieve and maintain an erection. Malegra Pro 100 mg is available in tablet form, and the recommended dosage is usually one tablet taken orally with water, as needed, approximately 30 minutes to one hour before sexual activity. The effects of Malegra Pro typically last for up to four hours, during which time sexual stimulation is required for the medication to be effective.