Tadagra Softgel 20 mg is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient tadalafil, which belongs to a class of medications known as phosphodiesterase type 5 (PDE5) inhibitors. Similar to other formulations of tadalafil, such as tablets or capsules, Tadagra Softgel 20 mg works by increasing blood flow to the penis during sexual stimulation, thereby helping men achieve and maintain an erection. It does this by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which is responsible for the breakdown of cyclic guanosine monophosphate (cGMP) in the smooth muscle cells of the penis. By inhibiting PDE5, tadalafil allows cGMP to accumulate, leading to relaxation of the smooth muscles and dilation of the blood vessels in the penis, which facilitates an erection.