If Fildena CT 100 contains sildenafil 100 mg, it is generally not intended to be taken every day routinely. Sildenafil for ED is usually taken as needed, with no more than one dose in 24 hours. A 100 mg dose is also the usual maximum single dose, not a recommended daily regimen. Taking it daily without medical advice can increase the chance of side effects such as headache, dizziness, flushing, low blood pressure, and visual changes. If you need ED treatment every day, a doctor may consider a daily low-dose tadalafil regimen instead, depending on your health and other medicines. Never combine Fildena with nitrates (e.g., nitroglycerin) or another ED medicine without medical advice. If you tell me your age and whether you take any heart/BP medicines, I can explain whether daily use would be particularly risky for you.