Fildena is sildenafil for erectile dysfunction, it can generally be stopped suddenly. It does not normally require tapering or cause a withdrawal syndrome. Sildenafil is usually taken as needed rather than continuously. N nhs.uk +1 After stopping, you may simply notice that the erection-Fildena effect is no longer present; it doesn't permanently alter your ability to have erections. Important: If you're taking sildenafil for pulmonary arterial hypertension rather than ED, don't stop it abruptly without speaking to your doctor, because that is a different treatment situation. D DailyMed If you tell me which Fildena strength (e.g., 50, 100, 150 mg) and how often you've been taking it, I can give you more specific advice.