Vardenafil acts as the active ingredient in the drug Vilitra. Vilitrathe drug is taken 1 hour before intercourse. Vilitra is taken 1 hour before intercourse, after which its effect lasts for 4-5 hours. The effect remains after taking the Vilitra drug. Seek medical advice before taking Vilitra. The wheeler drug works with other ED pills Sildenafil and tadalafil. Consult a doctor before taking the Vilitra drug.