If prescribed, your medication will be delivered straight to your door in discreet packaging within 4 hours, at no additional cost. The production of fake Viagra is completely unregulated. If you experience any side effects after taking Viagra, it is important to seek medical attention immediately. It lasts 4 to 5 hours, or longer if you have mild to moderate ED. The company hopes more of its partners will purchase the readers based on recommendations from the U. Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure.Pfizer won’t say how much money they lose on fake Viagra, but the drug is one of the company’s blockbusters, pulling in more than $2 billion in Viagra isn’t Pfizer’s only . What is Fake Viagra? Fake Viagra is a counterfeit version of the real medication. It is often sold online or on the black market and can be difficult to distinguish from the real thing. . Pfizer fights fake Viagra with RFID. Drug maker release details of high-tech plan to ensure its most frequently counterfeited product is the real thing. Photo: Viagra RFID takes aim .