The phosphodiesterase 5 inhibitor Fildena 100mg - https://genericvillage.com/product/fildena-100mg/ relaxes the smooth muscles of the penis and increases blood flow there. Only when there is sexual stimulation can an erection be achieved and maintained.
An inhibitor of phosphodiesterase (PDE-5) is Fildena 200mg Tablet. By relaxing the muscles in the penile blood vessels, it increases blood flow to the penis.