Filitra should be used according to the advice of a qualified healthcare professional. The appropriate dose depends on individual health factors and other medicines being taken. Common side effects may include headache, flushing, indigestion, nasal congestion, dizziness, and back pain. Vardenafil can interact with nitrate medicines, potentially causing a dangerous drop in blood pressure. Anyone taking nitrates or certain heart medicines should consult a healthcare professional before using Filitra. Sudden vision or hearing changes, chest pain, or a prolonged erection require immediate medical attention. https://www.genericday.com/filitra-20-mg.html