Maxon is a medicinal product used totreat erectile dysfunction in adult men. Maxon Active contains theactive ingredient sildenafil, which belongs to the drugs from the group ofphosphodiesterase type 5 (PDE5) inhibitors. It works by relaxing the bloodvessels in your penis, allowing blood to flow into your penis when you are sexuallyexcited. Sildenafil will only help you to get an erection if you are sexuallystimulated.