The main active ingredient in Cenforce LD is sildenafil citrate, which belongs to a group of medicines called phosphodiesterase type-5 (PDE-5) inhibitors. Sildenafil works by relaxing the muscles in the blood vessel walls and increasing blood circulation in the penile area. When a man is sexually aroused, this improved blood flow helps produce a firm and long-lasting erection. However, the medication only works when sexual stimulation occurs and does not cause an automatic erection. https://www.genericday.com/cenforce-ld.html