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Viagra FDA approval[np] In 1998, Sildenafil citrate (marketed as Viagra) was approved by the U.S. Food and Drug Administration (FDA). Viagra was the first oral pill to treat impotence, a dysfunction affecting millions of men in the U.S. It was patented by, and is manufactured by Pfizer Phamaceuticals, New York, N.Y. Viagra is reported to be its sixth-biggest drug product, with annual sales of about $2 billion. It subsequently lost its monopolu on the treatment when Eli Lilly released the longer acting drug Cialis. In Canada, the patent was invalidated on 8 Nov 2012 by the Canadian Supreme Court for being too vague in its Canadian patent filing, by failing to meet adequate disclosure obligations on the active ingredient. That patent had been challenged by the world's largest generic drug maker, the Israeli-based Teva Pharmaceutical Industries, Ltd.«
Gary and Martin were standing at the urinals in a public lavatory, when Gary glanced over and noticed that Martin's penis was twisted like a corkscrew. "Wow," Gary said. "I've never seen one like that before."
"Like what?" Martin said.
"All twisted like a pig's tail," Gary said.
"Well, what's yours like?" Martin said.
"Straight, like normal," Gary said.
"I thought mine was normal until I saw yours," Martin said.
Gary finished what he was doing and started to give his old boy a shakedown prior to putting it back in his pants. "What did you do that for?" Martin said.
"Shaking off the excess drops," Gary said. "Like normal."
"&%$#@ !," Martin said. "And all these years I've been wringing it."