Cialis 10mg is a prescription medication that primarily serves the purpose of treating erectile dysfunction (ED) in men. The active ingredient in Cialis is Tadalafil, which belongs to a group of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Tadalafil works by relaxing the blood vessels in the penis, thereby increasing blood flow during sexual stimulation. This enhanced blood circulation facilitates the achievement and maintenance of an erection, making it an effective treatment option for individuals experiencing difficulties related to ED.