How does Fildena 100 help with erectile dysfunction? Fildena 100 is a class of PDE-5 inhibitor drugs with sildenafil citrate as a key component. The entire working of Fildena 100mg or Fildena 120mg tablets is based on sildenafil while sildenafil relies on s*xual stimulation to occur. Once s*xual arousal is observed, Sildenafil reacts to lower the overall body pressure. Its main function is to...