What is the chemical formula of Viagra?

The chemical formula for Viagra is C28H38N6O11S. Viagra is simply the brand name of sildenafil citrate and is also sold under the brand name Revatio when it is used to treat pulmonary arterial hypertension.

Viagra is used to treat erectile dysfunction in men, and comes in the form of a small, blue, diamond-shaped tablet. Doctors have found that taking Viagra after consuming a meal that is high in fat may delay the drug's effectiveness. The drug's other form, Revatio, is used to treat high blood pressure in the arteries of the lungs, and comes in the form of a small, round, white tablet.