Viagra was the company’s sixth best-selling drug last year, pulling in income of $2.05 billion, up 4 per cent on 2011.

Pfizer’s little blue pill, Viagra, loses patent protection in Ireland and Britain today. It is just the latest blockbuster drug to fall off the patent(...)

It was the drug that launched a thousand quips. It not only propelled Pfizer into the public consciousness but put the company’s Irish headquarters an(...)