Viagra, trade name of the first oral drug for male impotence, introduced by the pharmaceutical company Pfizer, Inc., in 1998. Also known by the chemical name sildenafil citrate, it is one of a category of drugs known as phosphodiesterase-5 inhibitors. See also PDE-5
Sildenafil Emerges as a Candidate Drug for Alzheimer's Disease – Consult QD
How did Viagra become 'Viagra'? Through this fascinating process
Is Viagra about to lose its pulling power in the UK?, Pharmaceuticals industry
How to Take Viagra with Water or Milk, Plus Other Tips
Viagra: The little blue pill that could
Viagra to Treat, Even Prevent, Alzheimer's? Early Research Leads to New Clinical Trial
Viagra tablets hi-res stock photography and images - Alamy
Generic Viagra (sildenafil): Everything you need to know in 2024
Doctors: Viagra Could Hide Signs of Heart Trouble
Customs Officers Find More Than 900 Viagra Erectile Dysfunction Pills Inside Man's Bag at Philadelphia International Airport, Officials Say – NBC10 Philadelphia
Why Viagra may be useful in treating lung diseases
How does Viagra work? What is it Used For?
Viagra to be available without a prescription in UK