Megalis 20 mg is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient Tadalafil, which is also found in Cialis. Tadalafil belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors, which work by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection sufficient for sexual activity. https://www.genericday.com/megalis-20-mg.html