Why don’t doctors necessarily hand out free Viagra samples anymore? Viagra is now available as a generic, making it more ...

The day after Pfizer Inc’s patent for Viagra expired in Brazil, Carlos Sanchez flooded pharmacies with his generic erectile dysfunction pills. It was a day his army of lawyers, researchers and ...

Learn more with How to Get Viagra: Do You Need A Prescription?) Since 1998, the Pfizer-created drug sildenafil citrate has been a reliable treatment for the management of ED. But the active ...

Nearly three decades ago, Viagra (sildenafil) was invented in a Pfizer laboratory as a groundbreaking treatment for erectile dysfunction (ED). Since then, the drug used has been highly marketed ...