<b> Fildena 100 mg purple pills </b> is a medicine used to deal with erectile dysfunction (ED) in men. It consists of the energetic ingredient sildenafil citrate, which is a phosphodiesterase kind five (PDE5) inhibitor. PDE5 is an enzyme that restricts blood go with the flow to the penis, making it hard for guys to gain and preserve an erection. Erectile dysfunction is the inability to achieve or maintain an erection sufficient for sexual intercourse.