The active ingredient in Snovitra XL 60 mg is Vardenafil, a PDE5 inhibitor. Vardenafil works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. It functions by inhibiting the action of the enzyme PDE5, which is responsible for the breakdown of cGMP. This increase in cGMP levels causes the blood vessels in the penis to relax, allowing more blood to flow in and leading to an erection. Snovitra XL 60 mg is usually taken about 30 to 60 minutes before sexual activity, and its effects can last for up to 12 to 14 hours due to the extended-release mechanism. However, it is important to note that Snovitra XL 60 mg does not cause an erection without sexual arousal.