Clinical studies have demonstrated comparable efficacy between Tadarise 40 and Viagra, with each medication showing effectiveness in a significant percentage of men with ED. However, Tadarise 40 Mg's prolonged duration of action of up to 36 hours provides flexibility in timing sexual activity, which may be advantageous for some patients. While both medications work by inhibiting PDE5, Tadarise 40 Mg has a longer duration of action compared to Viagra, offering a window of opportunity for spontaneity in sexual activity.