Malegra 50 Mg belongs to a class of medications known as PDE5 inhibitors. PDE5 inhibitors work by blocking the enzyme phosphodiesterase type 5 (PDE5), which constricts blood vessels in the penis and prevents proper blood flow. By inhibiting PDE5, Malegra 50 Mg allows the blood vessels in the penis to relax and dilate, facilitating the increased blood flow necessary to achieve an erection.