ORDER HERE : https://shorturl.at/nuAIT ED happens because of the reduced flow of the blood in the walls of the penile region. Viagra, which is the brand name given to a drug called Sildenafil Citrate. It belongs to a group of drugs known as PDE5. They function by relaxing the blood vessels which allows for an increased blood flow to the penis and helps in achieving and maintaining erections. The Benefits that Sildenafil citrate are mentioned below : → Sildenafil helps in increasing the flow of blood in the penile region. → Hence, it helps to hold the erection while having sexual intercourse.