Malegra 100 is a medication primarily used to treat erectile dysfunction (ED) in men. It contains Sildenafil Citrate, which is the same active ingredient found in Viagra. Malegra 100mg works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which is responsible for breaking down cGMP, a substance that relaxes the blood vessels in the penis. By blocking PDE5, Malegra 100 enhances the effects of nitric oxide, allowing for increased blood flow to the penis when sexually aroused, leading to a firmer and longer-lasting erection. It is important to note that Malegra 100 should be taken as prescribed by a healthcare provider, and it works only when combined with sexual stimulation.