Answer:
Viagra is a Pfizer product for curing impotence in men. Basics like Sildenafil Citrate deliver energizing effects by working on the force of blood flow. The arteries in the penile get cleared off, which widens the passage for increased blood supply. Medically, Viagra is also known as PDE5 inhibitor working on the cGMP enzyme by overall nurturing the natural straightening process. In short Viagra helps to attain erection.