비아그라에 대해 알아야 할 고려 사항

Sildenafil belongs to a class of medicines named phosphodiesterase type five (PDE5) inhibitors. A class of medicines is a group of medications that work in an analogous way. These prescription drugs in many cases are applied to deal with similar disorders.Priapism warning: This drug can cause priapism, that's an erection that received’t disappear