cocopark.fr is one of the world's most counterfeited medicines. According to a Pfizer study, around ... Sildenafil 100 milligram tablets (prescription in the European Union) Pfizer's patent on sildenafil citrate expired in some member countries of the EU, Austria, Denmark, France, Germany, Ireland, Italy, The Netherlands, Spain, Sweden, the United Kingdom and Switzerland on 21 June 2013. A UK ...