sildenafil citrate

[ sil-den-uh-fil ]

noun

, Pharmacology.

1. a white crystalline powder, C 22 H 30 N 6 O 4 S, that temporarily normalizes erectile function of the penis by blocking an enzyme known to inhibit the production of a chemical that causes erections: used in the form of a pill to treat impotence.

Example Sentences

And with sildenafil citrate going generic in three years, Pfizer will soon lose sole ownership over the Viagra formula.

From The Daily Beast