Take one dose of Fildena 150 mg as prescribed by the doctor without overdosing or changing the dosage on your own. Always try to take the Fildena 150mg after a light meal or on an empty stomach and avoid taking it after a large or fatty meal. Once taken, it can keep you charged for more than 4-5 hours. Fildena 150 uses Sildenafil Citrate as its main salt composition in a powerful 150 mg dosage.