Viagra Connect contains the active ingredient sildenafil, a medication that belongs to a group of medicines called phosphodiesterase type 5 (PDE5) inhibitors. It works by helping to relax the blood vessels in your penis, allowing blood to flow into your penis when you are sexually aroused. This helps you to achieve and maintain an erection. Viagra Connect is suitable for men who are experiencing erectile dysfunction (ED) due to various factors such as neurogenic, vascular, or psychological causes.