horny goat weed

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In our last post, we discussed a recent USPTO ruling that rejected a claim of the Pfizer patent on the erectile dysfunction drug, sildenafil (Viagra®), to a novel oral treatment for the disorder. The patent appeals panel ruled that the existence of horny goat weed, a traditional Chinese medicine used orally for impotence, was grounds…

Reuters and Bloomberg reported earlier this week on an ongoing patent battle (read: pissing match) between Pfizer and Eli Lilly & Co. relating to their erectile dysfunction drugs Viagra and Cialis, respectively. A US Patent and Trademark Office (USPTO) appeals committee has ruled that an element of Pfizer’s patent on sildenafil, the active chemical in…