Fildena 100 purple pills is a brand manufactured by Fortune healthcare India to treat male impotence also known as erectile dysfunction. Inability to maintain or achieve a proper erection during sexual intercourse. Fildena contains the popular salt Sildenafil citrate. It comes in a pack of 10 tablets, which are purple in color and triangular-shaped. When a man is sexually stimulated, the body releases nitric oxide, which stimulates the production of cyclic guanosine monophosphate (cGMP), a chemical that relaxes the smooth muscles in the penis, allowing for increased blood flow to the area. PDE5 is an enzyme that breaks down cGMP, reducing blood flow to the penis and causing ED.