Filitra 40 mg contains vardenafil, which is a phosphodiesterase type 5 (PDE5) inhibitor. Similar to sildenafil (Viagra) and tadalafil (Cialis), vardenafil works by increasing blood flow to the penis during sexual stimulation, facilitating the achievement and maintenance of an erection. Filitra 40 mg contains 40 milligrams of vardenafil per tablet. This is a relatively high dose compared to other vardenafil formulations. https://www.flatmeds.com/product/filitra-40-mg/