are allergic to sildenafil, as contained in Viagra® and Revatio, or any from the elements in Viagra®. Begin to see the end of the leaflet for a complete listing of components in Viagra®.Sildenafil je aktivna sestavina, ki jo vsebuje ve?ina u?inkovitih pripravkov za potenco. Ta komponenta zagotavlja pretok krvi v penis in povzro?a mo?no in trdno