비아그라에 대한 모든 것

Sildenafil belongs to a class of medicine termed phosphodiesterase type 5 (PDE5) inhibitors. A class of medication is a group of prescription drugs that get the job done in the same way. These prescription drugs tend to be used to take care of very similar problems.It's unsure whether or not PDE5 inhibitors right cause the vision reduction. Halt us