Megalis 20 Mg is a medication primarily used to treat erectile dysfunction (ED) in men. It contains the active ingredient tadalafil, which belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. Tadalafil works by increasing blood flow to the penis during sexual stimulation, resulting in improved erectile function. Megalis 20 Mg is available in the form of oral tablets, with each tablet containing 20 milligrams of tadalafil.