New Studies on Viagra (Sildenafil citrate)
Viagra is a drug used to treat male erectile dysfunction. Also known as Sildenafil citrate or Revatio, its primary competitors on the market are tadalafil (Cialis), and vardenafil (Levitra).
As with all medications, proper dosage should be determined by a doctor. The normal dose of Viagra (sildenafil) is 25mg to 100mg taken once per day between […]