Zhewitra is simply a generic version of Vardenafil, offering the same mechanism of action and similar results to Levitra but at a more affordable price. While the active ingredient is identical, the formulation might differ slightly depending on the manufacturer. The active ingredient in Levitra is Vardenafil, which works similarly to Sildenafil by blocking PDE5. However, Vardenafil has a slightly different chemical structure, which allows it to bind more effectively to the PDE5 enzyme, potentially enhancing its effectiveness for some individuals. https://www.flatmeds.com/product/zhewitra-20-mg/