Fildena Professional and Viagra the same? Similarities: Both contain the same active ingredient: Sildenafil Citrate. Both are used to treat erectile dysfunction (ED) in men. Both work by increasing blood flow to the ***** to help achieve and maintain an erection during ***** stimulation. Dosages are similar (e.g., 25 mg, 50 mg, 100 mg). Differences: Brand vs. Generic/Generic-like: Viagra is the original brand-name drug developed and marketed by Pfizer, with FDA approval and extensive clinical testing. Fildena Professional is a generic or branded generic made by other pharmaceutical companies (like Fortune Healthcare) and may not have FDA approval, depending on the country. Formulation: Fildena Professional is often marketed as a sublingual tablet, meaning it dissolves under the tongue for potentially faster absorption. Viagra typically comes as a standard oral tablet that you swallow. Regulation: Viagra is FDA-approved in the U.S. and many other countries. Fildena Professional may not be FDA-approved, depending on the market. Summary: They both contain sildenafil and work similarly, but Viagra is the original, FDA-approved brand with stringent quality controls, while Fildena Professional is a generic alternative that may differ in formulation and regulatory approval.