Fildena Function 1. What is Fildena and what is the active substance? Fildena 100 is a drug for the treatment of Erectile Dysfunction or Male Impotence that contains the active substance Sildenafil Citrate. The factory is Fortune Healthcare, an Indian drug company founded in 1973. Sildenafil Citrate is patented by the Pfizer drug company, which became world-famous thanks to Viagra. The patent was not valid in India, which allowed Fortune Healthcare to start manufacturing the same active component . Similar preparations are also known as generic drugs. They contain the same active ingredient as the original drugs, in this case, Sildenafil citrate. The impact of a generic drug on the original is comparable at a lower price. "Generic Viagra Medications " with the most popular Sildenafil Citrate are: · Fildena (Fortune Healthcare) · Sextreme (Shree Venkatesh) · ...