Fildena 100 Purple pills help relax the blood vessels in the penis by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which restricts blood flow. By blocking PDE5, sildenafil increases nitric oxide levels, allowing for smoother blood circulation. This mechanism supports a strong and sustained erection, helping men regain confidence in their sexual performance. However, it is important to note that Fildena 100 does not work as an aphrodisiac; sexual stimulation is necessary for it to be effective.